MimirIP Sues MediaTek in East Texas Over Four Semiconductor Fabrication and Memory Interface Patents.

The complaint

The case is MimirIP LLC v. MediaTek Inc., No. 2:26-cv-00777-JRG (E.D. Tex.), filed September 1, 2026 in the Marshall Division with a jury demand. MimirIP is a Texas limited liability company based in Dallas; MediaTek is a Taiwanese corporation based in Hsinchu. The complaint says the patents came out of a memory chipmaker's research and development and that MimirIP owns them by assignment. It bases venue on 28 U.S.C. 1391(c)(3) because MediaTek is a foreign corporation.

The patents and asserted claims

U.S. Patent 7,468,317, titled Method of forming metal line of semiconductor device, issued December 23, 2008. Claim 1 covers forming a metal line by depositing two insulating layers with different etch selectivities, etching a contact hole through them, forming a metal barrier layer, filling the hole with a first metal, stripping that metal from the upper insulating layer so it remains only in the hole as a contact plug, and forming a metal line over the plug. U.S. Patents 7,755,954, issued July 13, 2010, and 7,978,547, issued July 12, 2011, are both titled Data I/O control signal generating circuit in a semiconductor memory apparatus. Claim 1 of the '954 patent covers a circuit that generates a short-delay and a long-delay signal and selects the short one in a high-speed operation mode and the long one in a low-speed mode, with the modes set by whether a CAS latency signal is above or below a predetermined value. Claim 1 of the '547 patent covers a circuit with two delay blocks that delay an input pulse by a smaller and a larger value and a selection block that picks one of the two delayed signals according to the value of a CAS latency signal. U.S. Patent 8,274,102, titled Semiconductor device, issued September 25, 2012. Claim 9 covers a semiconductor device with an active region in a substrate, a silicon germanium layer in a PMOS region of the active region, a PMOS gate over the silicon germanium layer, and an NMOS gate over the active region. The complaint asserts at least claim 1 of the '317, '954, and '547 patents and claim 9 of the '102 patent.

Accused products

For the '317 and '102 patents, the complaint accuses MediaTek systems on a chip including the Dimensity 800, 900, 1000, 6000, 7000, 8000, and 9000 Series, Helio G Series, and Kompanio Series, using images of a Dimensity 6300 for the '317 fabrication method and a Dimensity 7400 for the '102 claim. For the '954 and '547 patents, it accuses products that work with DDR3, LPDDR3, DDR4, and LPDDR4 memory, including Helio, Dimensity, MT81xx tablet, and Kompanio products. It pleads direct infringement, including under 35 U.S.C. 271(g) for products made by the patented process, and induced infringement; its general allegations also cite contributory infringement under 35 U.S.C. 271(c).

Knowledge and relief

MimirIP alleges, on information and belief, that MediaTek monitored its portfolio or the original owner's portfolio because the two chipmakers compete, so it knew or should have known of the patents when they issued, and that the infringement is willful. The prayer asks for damages of no less than a reasonable royalty, trebled, interest, an accounting for post-discovery damages, and attorneys' fees under 35 U.S.C. 285.

What to watch next

The case is assigned to District Judge Rodney Gilstrap, according to the September 1, 2026 assignment entry. Summonses were returned executed on September 11, and the court entered an order on a motion to extend MediaTek's time to answer on October 8, 2026 (ECF No. 13). Watch for MediaTek's answer or Rule 12 motion.