SK hynix Sues Patent Owners, Seeking Clarity on HBM and DRAM Rights

ENGLISH · SEMICONDUCTOR PATENTS

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SK hynix and its U.S. affiliate have filed a declaratory-judgment action in California against Longhorn IP and Mago Barca IP over patents asserted against high-bandwidth memory (HBM) and DRAM products. The complaint, filed October 8 in the Northern District of California, asks the court to find that the products do not infringe eight patents and that seven are invalid.

Two suits in different courts

The filing followed a separate patent-infringement action brought the same day by Mago Barca in the Eastern District of Texas. That case asserts five patents against SK hynix. The California complaint describes the patents as formerly associated with TSMC and alleges repeated demands through related entities. Those statements are allegations by SK hynix, not findings by a court.

The parallel cases put HBM and DRAM patent exposure in focus as demand for AI accelerators increases the strategic value of memory technology. The courts will need to assess claim scope, validity and infringement based on the evidence and applicable patent law. Neither filing resolves the merits.

Companies in the semiconductor supply chain should track asserted patent families, review product design against claim language and preserve licensing and technical records when disputes emerge.

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Sources: California docket · Texas docket · IP Fray report