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Micron v. UMC & Fujian Jinhua: A Three-Front Battle Across Civil, Criminal, and Export Control Law

2026-04-25

In December 2017, U.S. memory giant Micron Technology sued Taiwan's UMC and PRC state-backed Fujian Jinhua in the Northern District of California, alleging coordinated theft of DRAM trade secrets. What followed was a six-year, three-front campaign: a civil suit, a parallel DOJ criminal indictment, and Commerce Department export controls. UMC pleaded guilty in 2020 and paid a USD 60 million fine; Micron and Jinhua reached a global settlement in December 2023; and a federal judge acquitted Jinhua at a bench trial in February 2024. The case remains a landmark of the U.S.-China chip war and the China Initiative era.

Micron v. UMC & Fujian Jinhua: A Three-Front Battle Across Civil, Criminal, and Export Control Law

When Micron Technology filed suit against United Microelectronics Corporation (UMC) and Fujian Jinhua Integrated Circuit Co. on December 5, 2017 in the Northern District of California, few observers anticipated that the dispute would mature into one of the defining legal artefacts of the U.S.-China semiconductor conflict. The case bundled commercial trade-secret theft with state industrial policy: Jinhua was a PRC state-backed DRAM project, UMC its contracted Taiwanese technology partner, and the alleged conduit was a small group of engineers who had moved from Micron’s Taiwan subsidiary to UMC and then onward to Jinhua. Over six years the dispute would expand from a single civil docket into a coordinated three-front campaign — civil litigation, federal criminal prosecution, and Entity List export controls — and would close with each front producing a different verdict.

Timeline

Strategies of the Parties

Micron opened on three fronts simultaneously, an approach that became a template for later technology-IP disputes. The civil suit in California was the commercial workhorse — seeking damages, injunctions and a forum to compel discovery. A parallel referral to DOJ produced criminal indictments that carried the threat of corporate fines an order of magnitude greater than civil damages, and personal exposure for the individual defendants. Most consequential was the regulatory front: by lobbying Commerce to add Jinhua to the Entity List in October 2018, Micron severed Jinhua from access to U.S. semiconductor equipment, design tools and IP, freezing Jinhua’s DRAM ramp before any court had ruled. The Entity List action did not require proof beyond a reasonable doubt; it required only a national-security risk finding.

UMC initially defended the civil and criminal cases vigorously, but pivoted in 2020 to a negotiated resolution. The plea agreement narrowed UMC’s exposure to a single count of receipt-and-possession of a stolen trade secret, swapped the open-ended damages threat for a fixed USD 60 million fine, and bought DOJ cooperation. UMC’s strategy reflected the realities of a publicly listed Taiwanese foundry that needed continued access to U.S. customers and equipment.

Fujian Jinhua chose a fundamentally different posture: contest jurisdiction, contest evidence, and stake its defence on the proposition that whatever wrong UMC’s individual employees may have committed, those acts were not attributable to Jinhua and did not benefit Jinhua. Jinhua appeared in the U.S. court, waived a jury, and tried the case to the bench in early 2024. The strategy was high-risk — Jinhua had already been crippled commercially by the Entity List — but it offered the only remaining route to a public exoneration.

Outcomes

The three fronts produced strikingly different results. On the criminal track, UMC pleaded guilty and paid USD 60 million; Jinhua was acquitted; and the three individual defendants remain charged but beyond U.S. reach. On the civil track, Micron and Jinhua reached a confidential global settlement in December 2023, mutually dismissing all claims worldwide. The Entity List designation remains in effect, and Jinhua’s planned DRAM production never materialised at scale.

The collateral consequences extended well beyond the courtroom. Micron itself became a target: in May 2023 the Cyberspace Administration of China declared Micron products a cybersecurity risk and barred them from China’s critical information infrastructure, materially affecting a customer base that had previously accounted for roughly a quarter of Micron’s revenue. The settlement seven months later was widely read as part of a broader recalibration of Micron’s China posture.

Significance

Three features make this case a landmark for early-stage to IPO-stage Chinese technology companies and for the U.S.-China legal interface generally.

First, it crystallised a three-instrument model — civil trade-secret litigation, federal criminal prosecution, and export-control designation — that has since been redeployed in other technology disputes. The instruments operate on different evidentiary thresholds and different timelines; combined, they multiply pressure on a foreign target faster than any single tool could.

Second, it exposed the divergent fates of corporate co-defendants. UMC, a Taiwan-listed foundry deeply integrated into the U.S.-aligned supply chain, rationally chose to settle and pay. Jinhua, a PRC state-backed entity that had already lost commercial viability through the Entity List, rationally chose to fight. The same underlying conduct produced a guilty plea and an acquittal in the same courtroom.

Third, the case sat at the centre of the DOJ China Initiative, launched in November 2018 to address PRC-linked economic espionage. The Initiative was wound down in early 2022 amid criticism over civil-liberties and racial-profiling concerns, but the Micron prosecutions outlived the program and produced both its largest corporate fine and one of its highest-profile acquittals. For Chinese semiconductor companies preparing for international expansion or capital markets exposure, the case remains required reading on how trade-secret hygiene at the engineer-mobility level can determine corporate-level outcomes years later.

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