Chip Espionage Timeline 1947–2026: How Semiconductor Secrets Became a National Security Battleground
South Korea's Sept 13, 2026 espionage law explained, plus a fact-checked chip espionage timeline from the 1947 transistor to today's AI chip race.
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A semiconductor company does not have to lose a truckload of chips to lose something enormously valuable. The asset at risk might be a circuit design file, a manufacturing recipe, an equipment setting, source code, a materials specification or years of accumulated engineering know-how — none of which requires a single physical chip to leave the building. On September 13, 2026, South Korea’s revised espionage law took effect, extending criminal espionage liability beyond North Korea to any foreign country or organization for the first time since the statute was written in 1953 — a direct response to a string of semiconductor technology-leakage cases involving Samsung Electronics and SK Hynix. But not every unauthorized transfer of chip know-how legally qualifies as espionage. This timeline traces how semiconductor knowledge evolved from a commercial edge into a national-security asset, and it is careful about which word applies to which case.
⚡ Chip Espionage in 60 Seconds
Chip espionage is the unauthorized acquisition of semiconductor designs, manufacturing know-how or trade secrets for the benefit of a foreign government or organization — a narrower, legally specific category than ordinary trade-secret theft or industrial-technology leakage. A chip’s value is not only the finished part: circuit designs, process recipes, equipment settings, materials knowledge, packaging techniques, test methods and accumulated engineering know-how can all be valuable on their own. Competitors can’t simply copy an advanced chip because reproducing it requires thousands of coordinated manufacturing steps, specialized tools, and years of yield-improvement experience that documents alone don’t transfer. On September 13, 2026, South Korea’s revised Criminal Act Article 98 took effect, for the first time allowing espionage charges — not just lighter trade-secret charges — against leaks benefiting any foreign country, not only North Korea. AI accelerators have raised the stakes because they combine leading-edge logic, high-bandwidth memory (HBM) and advanced packaging, each controlled by a different country, so no single nation controls the whole supply chain. Not every trade-secret case is espionage: the new Korean law requires proof the person acted for the benefit of, and under the direction of, a foreign government or equivalent organization — a specific intent element, not an automatic upgrade.
Chip Espionage: Key Questions
What to Understand Before You Read Further
- Espionage and trade-secret theft are legally different things. Espionage requires acting for the benefit of a foreign government or equivalent organization; trade-secret theft does not.
- South Korea’s law changed for the first time in 73 years. Criminal Act Article 98, written in 1953 to cover only North Korea, now covers any foreign country as of September 13, 2026.
- A finished chip is only one layer of value. Design files, process recipes, equipment settings, materials know-how and yield data can each be independently valuable.
- No single country controls the advanced chip supply chain. The Netherlands, Japan, Taiwan, South Korea, the United States and China each hold different chokepoints.
- Possessing information is not the same as possessing manufacturing capability. Reproducing a leading-edge process requires specialized tools, materials, integration and years of yield learning that documents alone can’t transfer.
- Export controls are a policy tool, not espionage. Restricting legal access to technology is a different government action from prosecuting unauthorized acquisition of it.
- AI increased the stakes rather than creating them. Semiconductors have carried defense significance since the Cold War; AI accelerators raised the commercial and strategic value further.
- Employee mobility is not automatically theft. General skills and experience are legally different from documented trade secrets, and courts treat the two differently.
- Several 2024–2026 Korean cases prompted the law, but most were prosecuted as trade-secret or industrial-technology crimes, not espionage — illustrating exactly the legal gap the new provision targets.
What Is Semiconductor Espionage?
Semiconductor espionage is the covert acquisition, collection, leaking, transmission or brokering of chip-related secrets carried out for the benefit of, and under the direction or instigation of, a foreign government or an equivalent organization. That state-benefit and direction element is what separates it from three related but legally distinct problems: ordinary reverse engineering (lawfully studying a purchased product), patent disputes (civil arguments over who owns an invention), and trade-secret litigation (civil or criminal cases over confidential business information that don’t require proving a foreign-government connection).
Most semiconductor “leak” cases reported in the press — an engineer taking design files to a new employer, a company suing a former partner — are trade-secret or industrial-technology cases, not espionage in the legal sense. Espionage statutes are typically reserved for conduct tied to a foreign state’s interests, carry much heavier penalties, and require prosecutors to prove intent and foreign direction that ordinary trade-secret law does not.
Can You Steal a Chip Without Stealing the Chip?
What’s actually valuable inside a semiconductor fab
🏭 Semiconductor Fab — What Is Actually Valuable?
Tap each asset to see why it matters.
Useful — but only one part of the value
A finished chip tells a buyer what it can do, and skilled reverse engineers can learn something from its structure. But it does not hand over the manufacturing recipe, the equipment settings, the yield data or the accumulated process integration that produced it — the parts of the value chain below.
Circuit Design
The schematic and layout files defining how billions of transistors connect. Design files can be copied instantly, but using them to make a working chip still requires a compatible manufacturing process, licensed IP blocks (EDA/IP), and a foundry capable of the node.
Process Know-How
The exact sequence of steps — deposition, etch, lithography exposure settings, anneal temperatures — tuned over years to hit acceptable yield. Two fabs with identical equipment can get very different results because this tuning knowledge is often undocumented, tacit engineering experience.
Software
EDA (electronic design automation) tools, process-control software, and the firmware/drivers that make a chip usable in a real system. Software is often licensed IP in its own right and can be as tightly guarded as the physical design.
Material Knowledge
Photoresists, specialty gases, ultra-pure chemicals and substrate materials each have exact-tolerance specifications. Sourcing and qualifying the right material supplier is itself a multi-year process, not just a shopping list.
Packaging Technology
Advanced packaging (stacking multiple dies, connecting memory to logic) is now central to AI chip performance. The techniques for bonding, stacking and testing multi-die packages are a distinct, valuable know-how layer.
Engineering Know-How
The accumulated, often tacit experience of engineers who have spent years solving yield problems on a specific line. This is the hardest asset to protect through document control alone, and the hardest to legally define when an employee changes jobs.
From Idea to Working Chip: the Full Stack
The most difficult semiconductor advantages often live in accumulated processes and know-how, not merely in the final chip.
Chip Espionage Timeline: 1947–2026
From the invention of the transistor to South Korea’s 2026 espionage-law overhaul
The Transistor Is Demonstrated at Bell Labs
In December 1947, Bell Labs researchers John Bardeen, Walter Brattain and William Shockley demonstrated the point-contact transistor, a solid-state device that could amplify and switch electrical signals without the bulk and fragility of vacuum tubes.
Why it matters: This is the starting point of the modern semiconductor era. Every device covered later in this timeline is, ultimately, a descendant of this invention.
The Integrated Circuit Is Invented
Jack Kilby at Texas Instruments built the first working integrated circuit in September 1958. Robert Noyce at Fairchild Semiconductor independently developed a more manufacturable monolithic IC using the planar process, filing his patent application in July 1959. Both contributions are credited: Kilby’s proof of concept and Noyce’s practical, mass-producible design.
Why it matters: Putting multiple transistors on one piece of silicon, rather than wiring discrete components together, made the modern chip industry possible.
Chips Become Strategically Important to Computing and Defense
Semiconductors move from lab curiosity to essential components in computers, telecommunications, aerospace, and defense systems. As chips grow more complex, the manufacturing know-how behind them — not just the finished part — starts to carry real commercial and strategic value.
An FBI Sting Catches Hitachi and Mitsubishi Engineers Buying IBM Trade Secrets
In a landmark 1982 FBI sting, engineers connected to Hitachi and Mitsubishi were arrested for purchasing stolen IBM System/370-series documentation from an undercover source posing as a corrupt IBM contractor. Hitachi pleaded guilty in U.S. federal court in 1983 and separately settled civil claims with IBM.
Why it matters: One of the earliest, best-documented corporate technology-theft prosecutions in the computing industry, and a template for how U.S. law treats trade-secret theft distinct from state-directed espionage.
U.S.–Japan Semiconductor Trade Tensions Intensify
Japanese manufacturers’ rapid gains in DRAM triggered U.S. anti-dumping complaints and, in 1986, a bilateral Semiconductor Trade Agreement regulating pricing and market access. This was industrial policy and trade friction — not espionage — but it established the precedent that semiconductor competitiveness is a matter of national economic policy, not just corporate strategy.
TSMC Is Founded, Creating the Pure-Play Foundry Model
Morris Chang founded Taiwan Semiconductor Manufacturing Company in 1987, backed by the Taiwanese government and Philips. TSMC’s model — manufacturing chips designed entirely by other companies, rather than designing and building its own — separated chip design from chip manufacturing at industry scale for the first time.
Why it matters: The foundry model let hundreds of “fabless” design companies compete without owning a fab, but it also concentrated leading-edge manufacturing know-how into a small number of companies — making Taiwan’s foundry capacity a global chokepoint decades later.
South Korea Rises in Memory, Taiwan Expands Foundries, Japan Holds Materials
Samsung became the world’s largest DRAM producer by the early 1990s. Taiwan’s foundry sector expanded around TSMC and later UMC. Japan retained deep strength in specialty materials and semiconductor equipment. U.S. firms kept leadership in chip design, EDA software and manufacturing equipment. This is the decade the modern, geographically specialized supply chain took shape.
Global Supply Chains Specialize Further
A single advanced chip increasingly depends on intellectual property, design tools, lithography equipment, specialty materials, manufacturing capacity and packaging drawn from several different economies. No one country’s supply chain is self-contained by this point.
TSMC Wins a Non-Compete Injunction Against a Star Engineer Who Moved to Samsung
TSMC sued former chief R&D officer Liang Mong-song after he joined Samsung, alleging breach of a non-compete and risk of trade-secret disclosure. Taiwanese courts sided with TSMC, temporarily barring Liang from working at Samsung on competing technology.
Why it matters: A purely civil, employee-mobility dispute — not espionage, not even a criminal trade-secret case — that illustrates how seriously chipmakers treat senior engineers moving to rivals, years before Korea’s 2026 law existed.
DOJ Charges Fujian Jinhua and UMC Over Micron DRAM Trade Secrets
U.S. prosecutors alleged that Taiwan’s United Microelectronics Corporation (UMC), working with China’s state-backed Fujian Jinhua, recruited a Taiwanese engineer who brought stolen Micron DRAM trade secrets. UMC pleaded guilty to criminal trade-secret theft in U.S. federal court in October 2022 and paid a $60 million fine; Fujian Jinhua was separately indicted.
Why it matters: This was prosecuted as trade-secret theft under existing U.S. law, not as espionage — exactly the legal category South Korea’s 2026 law creates a parallel, heavier option for.
The U.S.–China Technology Confrontation Escalates
The U.S. added Huawei to its Entity List in May 2019, restricting its access to U.S. chip technology. In October 2022, the U.S. imposed sweeping export controls on advanced chips and chipmaking equipment sold to China. Days earlier, on August 9, 2022, President Biden signed the CHIPS and Science Act, subsidizing domestic U.S. chip manufacturing.
Why it matters: Export controls restrict legal access to technology; they are a policy tool, not a criminal-espionage finding. But tighter legal access can heighten government concern about unauthorized acquisition — the throughline to later cases below.
ASML Discloses Data Theft by a China-Based Former Employee
ASML, the sole global supplier of extreme ultraviolet (EUV) lithography machines, disclosed in a securities filing that a former employee based in China had misappropriated data related to its chip-patterning technology, in violation of company policy. No criminal conviction has been publicly disclosed in connection with this specific incident.
Why it matters: Shows that the companies making chipmaking equipment — not only the chipmakers themselves — are targets, because equipment know-how is its own strategic chokepoint.
The EU Chips Act and Japan’s Rapidus Signal a Global Build Push
The EU Chips Act entered into force in September 2023, targeting a larger European share of global chip manufacturing. Japan’s government-backed Rapidus venture, founded in 2022, began pursuing 2-nanometer-class logic manufacturing. South Korea advanced its own “K-Chips Act” tax incentives the same year.
Former SK Hynix Employee Convicted Over Leaked Image-Sensor Trade Secrets
A South Korean court sentenced a former SK Hynix employee to 18 months in prison for leaking CMOS image-sensor trade secrets while job-hunting with a China-based company — prosecuted under existing industrial-technology and trade-secret law, before Article 98’s expansion took effect.
Former Samsung Employees Indicted Over DRAM Technology Sent to China’s CXMT
South Korean prosecutors indicted five former Samsung Electronics employees, alleging they transferred DRAM chipmaking technology to Chinese memory maker CXMT (ChangXin Memory Technologies). Separately, in December 2025, prosecutors indicted 10 people — including a Samsung Electronics executive — over alleged leakage of 10-nanometer-class DRAM process technology from Samsung and SK Hynix, with estimated economic damage in the tens of trillions of won.
Why it matters: These are the specific cases South Korean officials and lawmakers cited when explaining why Article 98 needed to expand — both were prosecuted under industrial-technology law, not espionage, because the old statute didn’t reach conduct benefiting a non-enemy foreign state.
South Korea’s National Assembly Passes the Article 98 Amendment
The National Assembly passed the Criminal Act amendment on February 26, 2026. The National Intelligence Service publicly welcomed it, saying it would strengthen South Korea’s ability to prevent leaks of strategic technologies including semiconductors, displays, batteries and AI. The law was promulgated on March 12, 2026, starting a six-month grace period before taking effect.
South Korea’s Revised Espionage Law Takes Effect
Criminal Act Article 98 now covers espionage carried out for the benefit of, and under the direction of, any foreign country or equivalent organization — not only an “enemy state.” Those who detect, collect, leak, transmit or broker state secrets for a foreign entity, or assist such acts, face a minimum of three years in prison. The older provision covering espionage for an enemy state (North Korea) is unchanged and still carries far heavier penalties, including death, life imprisonment or a minimum of seven years.
Why it matters: It is the first fundamental change to South Korea’s espionage framework in the 73 years since Article 98 was written in 1953, and it directly targets the legal gap exposed by the Samsung and SK Hynix cases above. See the full explainer below.
Why Can’t You Just Copy the Files?
Why semiconductor manufacturing is so hard to reproduce
A leading-edge semiconductor process is not a single secret — it is the accumulated output of thousands of coordinated manufacturing steps, highly specialized tools available from only a handful of suppliers worldwide, careful materials qualification, continuous defect control, precision metrology, and years of engineering effort spent improving yield (the percentage of chips on a wafer that work correctly).
Possessing a document that describes a process is not the same as possessing the capability to run that process at commercial scale. A competitor who obtained a full set of process documents would still need:
- The right equipment, often available from only one or two qualified suppliers globally, with years-long order backlogs.
- Qualified materials suppliers whose chemistries and substrates match the exact tolerances the process assumes.
- Process integration experience — knowing how hundreds of steps interact, which is rarely fully captured in any single document.
- Yield-improvement time — the multi-year, iterative engineering work of finding and fixing the causes of defective chips.
- A trained workforce capable of operating and troubleshooting the line day to day.
This is the core reason semiconductor security experts distinguish information from capability. Losing sensitive documents is a serious problem — it can save a competitor years of R&D and give away competitive positioning — but it does not, by itself, hand over a working fab.
Build an Advanced AI System
Tap a piece of the supply chain, then see what happens if it’s removed
🇺🇸 Design, EDA & IP
Role: U.S. companies lead chip architecture, electronic design automation (EDA) software, and much of the licensable IP that designs are built from.
Remove it: Without design tools and licensable IP, new chip architectures become far slower and costlier to develop from scratch.
🇳🇱 Advanced Lithography
Role: ASML, based in the Netherlands, is the sole global supplier of extreme ultraviolet (EUV) lithography systems needed for the most advanced logic nodes.
Remove it: Advanced-node manufacturing becomes significantly harder; older lithography tools cannot pattern the smallest features economically.
🇯🇵 Materials & Equipment
Role: Japan supplies critical specialty materials (photoresists, silicon wafers) and semiconductor manufacturing equipment from companies like Shin-Etsu, SUMCO and Tokyo Electron.
Remove it: Material and equipment shortages ripple through every fab globally, since qualifying alternate suppliers can take years.
🇹🇼 Leading-Edge Foundry Manufacturing
Role: Taiwan, primarily via TSMC, manufactures most of the world’s leading-edge logic chips, including most AI accelerators.
Remove it: Advanced processor production becomes severely constrained; no other single foundry network currently matches this leading-edge capacity.
🇰🇷 Advanced Memory / HBM
Role: South Korea’s SK Hynix and Samsung together supply the large majority of high-bandwidth memory (HBM) used alongside AI accelerators.
Remove it: Many high-end AI systems face memory-bandwidth constraints, since HBM production is concentrated among very few qualified suppliers.
🌍 Advanced Packaging & Broader Assembly
Role: Taiwan leads advanced multi-die packaging for AI chips; China and Southeast Asia handle a large share of broader global assembly, test and mature-node packaging volume.
Remove it: Finished-system assembly slows across the industry, since packaging capacity for the most advanced multi-die designs is itself concentrated.
Not every AI accelerator follows this exact route — the specific mix of countries involved varies by chip and by company. No single country completely controls the advanced semiconductor supply chain.
The Global Semiconductor Chokepoint Map
Who leads which layer — market leadership changes over time; treat this as a snapshot, not a permanent ranking
| Layer | United States | Netherlands | Japan | Taiwan | South Korea | China |
|---|---|---|---|---|---|---|
| Chip Design & EDA | LEADING | — | IMPORTANT | IMPORTANT | IMPORTANT | GROWING |
| Advanced Lithography (EUV) | DEPENDENT | LEADING | IMPORTANT | DEPENDENT | DEPENDENT | DEPENDENT |
| Specialty Materials & Chemicals | IMPORTANT | IMPORTANT | LEADING | IMPORTANT | IMPORTANT | GROWING |
| Leading-Edge Foundry (logic) | GROWING | — | GROWING | LEADING | MAJOR | DEPENDENT |
| Mature-Node Foundry | IMPORTANT | — | IMPORTANT | MAJOR | IMPORTANT | MAJOR / GROWING |
| DRAM / NAND Memory | IMPORTANT | — | IMPORTANT | — | LEADING | GROWING |
| HBM (AI Memory) | GROWING | — | — | — | LEADING | — |
| Advanced Packaging | GROWING | — | IMPORTANT | LEADING | IMPORTANT | MAJOR (volume) |
LEADING = dominant global position. MAJOR = large, competitive share. IMPORTANT = meaningful capability, not dominant. GROWING = expanding but not yet dominant. DEPENDENT = relies primarily on other economies for this layer. A dash means the country is not a significant player in that specific layer.
Why Semiconductor Security Matters So Much to South Korea
Samsung Electronics and SK Hynix are South Korean semiconductor manufacturers with leading global positions in memory-chip production. Together, they account for roughly 60–70% of world DRAM output. In HBM specifically, SK Hynix held approximately 50% of the market in the second quarter of 2026, with Samsung at roughly 33% and rising, according to industry trackers. Micron, the largest U.S.-based memory maker, holds most of the remainder.
South Korea’s foundry position is smaller: Samsung runs a significant leading-edge logic foundry business, competing with TSMC, but Taiwan retains overall leadership in advanced-node foundry manufacturing. South Korea’s core strategic strength is memory — DRAM, NAND and especially HBM — which is exactly the technology category cited in the 2025–2026 leakage cases that prompted the Article 98 amendment.
What Changed in South Korea on September 13, 2026?
Article 98 — Before vs. After
Legally, the change is precise: Article 98 of South Korea’s Criminal Act, in force since 1953, covered espionage only when carried out on behalf of an “enemy state” — interpreted in practice as North Korea. Prosecutors handling cases involving China, or any other foreign government or company, could not bring espionage charges no matter how serious the alleged conduct, and instead relied on lighter industrial-technology-protection or trade-secret statutes.
The amendment, passed by the National Assembly on February 26, 2026 and promulgated March 12, 2026, adds a new offense: detecting, collecting, leaking, transmitting or brokering state secrets for the benefit of, and under the direction of, any foreign country or equivalent organization — including a foreign company or third-country entity, not only a government. It carries a minimum three-year prison sentence. The original enemy-state provision, with its far harsher penalties, is untouched.
Legal experts have flagged real ambiguity that the government has not yet fully resolved: what counts as a “national secret” under the new provision, and what qualifies as an “equivalent organization,” remain open questions the law itself does not spell out in detail. Industry lawyers have specifically warned companies not to assume that ordinary technical data can be shared just because an export contract exists — each transfer needs case-by-case review.
Does this mean semiconductor trade secrets are now automatically espionage? No. The new offense still requires prosecutors to prove the specific intent element — that a person acted for a foreign government’s or organization’s benefit and under its direction. A case can still be prosecuted as ordinary trade-secret theft, as most of the 2024–2025 Samsung and SK Hynix cases described above were, if that intent element isn’t met or isn’t pursued. China’s foreign ministry has publicly pushed back on the law, calling for “fair, just, and non-discriminatory” treatment of foreign enterprises operating in Korea.
HBM: AI’s Critical Memory Layer
HBM (High Bandwidth Memory) is a specialized type of memory chip, built by stacking multiple memory dies vertically and connecting them with thousands of tiny electrical connections, then placing that stack physically close to a processor. This design moves far more data per second than conventional memory laid out on a circuit board — and AI accelerators need that bandwidth because model training and inference constantly move enormous volumes of data between memory and compute. HBM is not itself an AI processor — it is the memory component that keeps a separate AI accelerator supplied with data fast enough to use its full computing power.
Because HBM production is concentrated among very few qualified suppliers — primarily SK Hynix and Samsung, with Micron a smaller but growing third — the manufacturing know-how behind it has become strategically sensitive in a way ordinary memory chips were not a decade ago. That is the direct link between AI demand and the semiconductor-security cases described throughout this article.
Protect Silicon-X
A fictional semiconductor company — illustrative defensive-security scenario, not a real case
Silicon-X guards R&D systems, manufacturing documentation, engineering workstations, supplier relationships, physical facilities, source code and proprietary process knowledge. Tap a threat category to see how companies typically respond.
Cyber Risk
Network intrusion, credential theft or malware targeting engineering systems. Layered defenses: network segmentation, least-privilege access, logging and monitoring.
Insider Risk
An employee or contractor with legitimate access misusing it. Layered defenses: data classification, access auditing, insider-risk monitoring programs, confidentiality agreements.
Supply-Chain Risk
Exposure through a vendor, contractor or component supplier with weaker controls. Layered defenses: supplier security requirements, vetting and contractual controls.
Unauthorized Disclosure
Sensitive information shared beyond its intended audience, deliberately or accidentally. Layered defenses: data classification, secure development environments, clear documentation policy.
Recruitment / Employee Movement Risk
Departing staff carrying confidential material to a new employer. Layered defenses: exit reviews, clear confidentiality agreements, and legal boundaries drawn around documented trade secrets specifically — not around an employee’s general skills and experience.
Physical Access Risk
Unauthorized entry to fabs, labs or equipment. Layered defenses: badge access controls, visitor logging, restricted zones around sensitive tools.
Security Budget: 100. This is one illustrative allocation, not a formula — there is no perfect allocation. Semiconductor security is a layered-risk problem, and real companies weight these differently based on their own exposure.
Espionage vs. Trade-Secret Theft vs. Export Controls
| Issue | Espionage | Economic Espionage | Trade-Secret Theft | Patent Infringement | Export-Control Violation |
|---|---|---|---|---|---|
| Protected interest | National security / state secrets | National economic competitiveness | Confidential business information | A patented invention’s exclusivity | Government control over what may legally leave the country |
| State involvement | Central — foreign government or its agent | Central, but framed as economic rather than military/intel | Usually none required | None required | Government is the regulator, not necessarily a beneficiary of the act |
| Legal basis (example) | Criminal Act Art. 98 (South Korea); U.S. Espionage Act | U.S. Economic Espionage Act (18 U.S.C. §1831) | Trade Secrets Act; Industrial Technology Protection Act (Korea); Defend Trade Secrets Act (U.S.) | Patent law (civil) | Export Administration Regulations (U.S.); Korea’s export-control regime |
| Intent required | Acting for foreign state’s benefit, under its direction | Intent to benefit a foreign government | Knowing/intentional misappropriation, no foreign-state element required | Not intent-based — unauthorized use is enough | Exporting controlled items/tech without required authorization |
| Typical information type | State/national secrets | Proprietary technology, trade secrets | Confidential recipes, designs, source code, customer data | Patented, publicly disclosed inventions | Controlled technology, equipment, software |
| Hypothetical example | An engineer secretly passes a classified defense-chip design to a foreign intelligence officer | A company covertly funds theft of a rival’s chip process to hand it to a state-backed competitor | A departing employee copies confidential process documents onto a personal drive | A company manufactures a chip design still covered by someone else’s active patent | A firm ships restricted lithography equipment overseas without an export license |
All examples above are hypothetical illustrations of legal categories, not descriptions of specific real cases.
Major Semiconductor Technology-Protection Cases
Selected for legal and geographic diversity — not a ranked list of “worst” cases
| Year | Company / Technology | What Was Alleged | Brought By | Legal Status |
|---|---|---|---|---|
| 1982 | IBM System/370 documentation | Hitachi and Mitsubishi-linked engineers purchased stolen IBM trade secrets in an FBI sting | U.S. DOJ / FBI | CONVICTED (Hitachi guilty plea, 1983) + civil settlement |
| 2015 | TSMC process know-how | Former TSMC R&D chief allegedly at risk of disclosing trade secrets after joining Samsung | TSMC (civil suit) | CIVIL CLAIM — TSMC won an injunction |
| 2018–22 | Micron DRAM trade secrets | UMC and Fujian Jinhua allegedly used a recruited engineer to obtain Micron’s DRAM process technology | U.S. DOJ | CHARGED → CONVICTED (UMC guilty plea, Oct 2022, $60M fine) |
| Jan 2023 | ASML EUV-related data | Former China-based employee allegedly misappropriated internal data | ASML (company disclosure) | ALLEGATION — no public criminal conviction disclosed |
| 2024–26 | SK Hynix CMOS image-sensor trade secrets | Former employee allegedly leaked trade secrets while job-hunting with a China-based firm | South Korean prosecutors | CONVICTED (18-month sentence) |
| 2025 | Samsung DRAM technology | Five former employees allegedly transferred DRAM technology to China’s CXMT | South Korean prosecutors | INDICTED — ongoing |
| Dec 2025 | Samsung / SK Hynix 10nm-class DRAM process | 10 people, including a Samsung executive, allegedly leaked process technology to Chinese competitors | South Korean prosecutors | INDICTED — ongoing |
Can an Engineer Take Their Knowledge to a Competitor?
✅ Generally Allowed
- General skills, expertise and professional experience gained on the job
- Publicly available information and published research
- Knowledge that isn’t documented as a specific confidential trade secret
❌ Generally Not Allowed
- Confidential process documents, recipes or source code taken without authorization
- Customer or supplier information covered by a confidentiality agreement
- Materials covered by an active, enforceable non-compete agreement, where such agreements are valid
Courts and regulators draw a real line between an engineer’s general skills and experience — which the law generally lets them carry to a new employer, since restricting that too broadly would chill an entire labor market — and specific, documented trade secrets or confidential information, which remain the former employer’s protected property regardless of who’s carrying the knowledge. NDAs, confidentiality agreements and, where enforceable, non-compete clauses exist precisely to mark that boundary in writing.
Hiring a competitor’s engineer is not, on its own, espionage or even trade-secret theft. The 2015 TSMC-Samsung case above shows how this actually plays out: TSMC didn’t argue that Liang Mong-song couldn’t work in the industry again — it argued a specific move, to a specific rival, on specific technology, created an unacceptable trade-secret risk, and a civil court agreed on those narrow terms.
Why AI Raised the Stakes
PC Era
Chips = productivity and commercial advantage
Smartphone / Cloud Era
Chips = digital economic infrastructure
AI Era
Advanced chips = economic capability, AI capability, cloud capability, scientific computing, and some defense capabilities
Semiconductors have carried defense and national-security significance for decades — military systems, satellites and cryptographic hardware have depended on leading-edge chips since well before generative AI existed. What changed with the AI era is not that chips suddenly became strategically relevant; it’s that the value concentrated in advanced chips grew sharply, because the same accelerator and memory technology now underpins economic competitiveness, AI capability, cloud infrastructure and scientific computing all at once. That concentration of value is what raised the stakes around protecting the knowledge behind it.
How Countries Build AND Protect Chip Industries
Expanding Capacity
- New fabs and expanded manufacturing capacity
- Research funding and university partnerships
- Workforce training pipelines
- Equipment investment
- Direct subsidies (CHIPS Act, EU Chips Act, K-Chips Act)
Guarding What’s Built
- Intellectual-property and trade-secret law
- Cybersecurity requirements for critical infrastructure
- Export controls on sensitive technology and equipment
- Supply-chain vetting and screening
- Strategic-technology-specific criminal statutes, like South Korea’s revised Article 98
The U.S. CHIPS and Science Act (2022), the EU Chips Act (2023), China’s large state-backed semiconductor investment funds, South Korea’s K-Chips Act incentives, Japan’s Rapidus venture, and Taiwan’s long-standing foundry-support policies are all “build” moves — expanding manufacturing capacity. Export controls, technology-protection statutes and cybersecurity rules are “protect” moves. Modern chip competition runs on both simultaneously.
How Do Semiconductor Companies Protect Their Secrets?
Defensive Practices (High-Level)
- Least-privilege access to sensitive systems and documentation
- Network segmentation between R&D, manufacturing and general corporate systems
- Data classification so the most sensitive material carries the strictest controls
- Logging and monitoring of access to critical systems
- Insider-risk programs alongside standard employee training
- Supplier and contractor security requirements
- Confidentiality agreements and clearly documented trade-secret registers
- Physical access controls around fabs, labs and sensitive equipment
- Secure development environments for source code and design files
- Incident-response planning for when controls fail
This section describes defensive categories only. It does not, and will not, describe how to defeat, evade or bypass any of these controls.
What Happens Next?
South Korea’s government is expected to face pressure to clarify the still-ambiguous terms in the new Article 98 — particularly what counts as a “national secret” and an “equivalent organization” — before the law is tested in its first real prosecutions. The Samsung and SK Hynix cases already in the pipeline will likely be watched closely to see whether prosecutors bring the new espionage charge, or continue relying on the existing industrial-technology statute. Internationally, expect continued build-and-protect moves on both fronts: more capacity investment under the CHIPS Act, EU Chips Act and Rapidus, alongside tighter technology-security rules in Taiwan, Japan and the U.S. as AI accelerator demand keeps rising.
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Every dated entry above was checked against these references. Last reviewed 13 September 2026.
- South Korea's expanded espionage law takes effect amid push to protect chip technology (wire report)
- Korea JoongAng Daily: Scope of 'espionage' to include leaks to allies, foreign companies with first revision in 73 years
- Korea JoongAng Daily: Korea's espionage law revision closes one loophole but opens another for defense exporters
- UPI: South Korea expands espionage law to cover all foreign states
- Seoul Economic Daily: Ex-SK hynix Worker Jailed for Leaking Chip Secrets to China
- Bloomberg: South Korea Ramps Up Spy Law to Protect Chip Secrets From China