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Yangtze Memory v Micron (CFI, 17 August 2026)

Date17 August 2026
CourtCFI
DivisionDüsseldorf (DE) Local Division
Type of actionInfringement Action
Case number(s)UPC_CFI_1034/2025
Registry referenceUPC-CFI-0001034/2025
PartiesYangtze Memory Technologies Co., Ltd. v. Micron Technology, Inc., Micron Europe Ltd., Micron Semiconductor (Deutschland) GmbH, Micron Semicond…

Official decision (PDF) · UPC registry entry

Case timeline

Dhenne Avocats represents claimants and defendants in European patent disputes before the Unified Patent Court, including the Paris divisions.

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Dhenne Avocats · 19 October 2026

Our analysis

Summary

On Micron’s application for protection of technical information on the Z01M chip, produced in support of a prior user right, the Local Division refuses an attorneys’ eyes only regime (paras. 16 to 26). Only the party whose access would be restricted may waive the right conferred by Rule 262A.6 RoP, and Yangtze’s waiver for information it had itself introduced does not extend to material produced against it (paras. 18 to 20). Being a competitor does not in itself justify such a regime, failing which Rule 262A.6 would be deprived of effect in most infringement actions (para. 21). US export restrictions, raised late, are the responsibility of the party choosing to produce the information (paras. 22 to 26). The existing circle of four persons is maintained (paras. 27 to 39). A five-year ban on any SDRAM design or research and development activity is refused as a disproportionate interference with the exercise of a profession. The ban accepted by the Court of Appeal in Ericsson v ASUSTeK, limited to licence negotiations with third parties, is held to be of an entirely different scale (paras. 40 and 41). Micron may withdraw the material concerned within a set time limit (para. 42).

Why it matters

The order applies to technical information the Court of Appeal’s case law on access by employees and draws a clear line: the ban accepted for comparable licences does not extend to research and development.

Practical point

Before producing sensitive technical information, check that it can be disclosed to at least one natural person on the opposing side, export constraints included. Otherwise, refrain from producing it or withdraw it within the time limit set by the Court.

Summary prepared by Dhenne Avocats. Only the official text of the decision is authoritative.

Decisions in the same proceedings

Going further

Lexicon: Patent infringement action.

Publications by Matthieu Dhenne: Pleading the Long Arm: What a UPC Statement of Claim Must Carry Beyond Jurisdiction (Kluwer Patent Blog).

Source and translations

Official source
Unified Patent Court registry link recorded in the record
Original language
not recorded
Translation available
no translation recorded the firm’s French record is a summary, not a translation
Date checked
not recorded
Only the official text is authoritative. A machine translation is never presented as official, republishing a third-party document requires a verified basis in rights, and a link to the source is preferred.

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Proceedings, related decisions, appeals, parties and patents as recorded in the registry and in the Dhenne Avocats corpus. Each link states its source.

Proceedings

  • UPC_CFI_1034/2025 official number

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Parties

Exact name as it appears in the record, group affiliation only where sourced and dated.

Decisions in the same proceedings and documented appeals

  1. 1 April 2026 Yangtze Memory v Micron (CFI, 1 April 2026) Application RoP262A · UPC_CFI_1034/2025

    L'estimation de bénéfice brut 2026 de Micron pour la France et l'Allemagne est protégée au titre de l'article 58 de l'Accord et des règles 262.2 et 262A, l'accès étant réservé aux représentants de Yangtze Memory et à quatre de ses salariés, sous astreinte en cas de violation.

  2. 17 August 2026 Yangtze Memory v Micron (CFI, 17 August 2026) Infringement Action · UPC_CFI_1034/2025
  3. 2 September 2026 Yangtze Memory v Micron (CFI, 2 September 2026) Infringement Action · UPC_CFI_1034/2025

    La demande d'écarter les arguments nouveaux de la duplique de Micron est renvoyée à la formation. Yangtze Memory est autorisée à répondre par écrit sur la possession antérieure avant le 17 septembre 2026.

What the record states

Nature of the act
Infringement Action
Outcome (Dhenne Avocats summary)
Saisie par Micron d'une demande de protection d'informations techniques sur la puce Z01M, produites au soutien d'un droit de possession antérieure, la division locale refuse l'accès réservé aux seuls avocats (§ 16 à 26). Seule la partie dont l'accès serait restreint peut renoncer au droit que lui confère la règle 262A.6 RoP, la renonciation de Yangtze pour des informations qu'elle avait elle-même introduites ne s'étend pas aux éléments produits contre elle (§ 18 à 20). La seule qualité de concurrent ne justifie pas ce régime, faute de quoi la règle 262A.6 serait privée de portée dans la plupart des actions en contrefaçon (§ 21). Les restrictions américaines à l'exportation, invoquées tardivement, relèvent de la responsabilité de la partie qui choisit de produire l'information (§ 22 à 26). Le cercle existant de quatre personnes est maintenu (§ 27 à 39). L'interdiction de cinq ans de toute activité de conception ou de recherche et développement sur la SDRAM est refusée comme atteinte disproportionnée à l'exercice de la profession. L'interdiction admise par la cour d'appel dans Ericsson c. ASUSTeK, limitée aux négociations de licence avec des tiers, est jugée sans commune mesure (§ 40 et 41). Micron peut retirer les éléments en cause dans un délai fixé (§ 42).
Appeal
No appeal documented in the corpus, this does not mean that no appeal was lodged.
Instance
First-instance decision, whether it has become final is not recorded.

Related decisions cited in the analyses

Scope: Dhenne Avocats corpus. Registry-based links are marked “official number”; links derived from the analyses are marked as such. An erroneous link can be withdrawn without deleting any record.

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