Yangtze Memory Technologies Company, Ltd. (YMTC) is a Chinese semiconductor integrated device manufacturer specializing in flash memory (NAND) chips. Founded in Wuhan, Hubei, China, in July 2016, YMTC was initially a subsidiary of the partially state-owned enterprise Tsinghua Unigroup, with significant investment from the Hubei provincial government and the state-owned China Integrated Circuit Industry Investment Fund. The company operates as a privately held entity with substantial state-linked financial backing and a diversified shareholder lineup including state-owned, private, and industrial capital. As of 2023, YMTC had approximately 8,000 employees. In September 2025, its parent company, Yangtze Memory Technologies Holding Co., Ltd., completed a shareholding reform, with a valuation exceeding 160 billion yuan.
YMTC focuses on the design, manufacturing, packaging, testing, and system solutions for 3D NAND flash memory. The company produces enterprise solid-state drives (SSDs) under its own brand and for resellers like Lexar, HP, Acer, Kingston, and Teamgroup, while its consumer products are marketed under the ZhiTai brand. YMTC's key technological innovation is its Xtacking® architecture, which separates memory cell arrays and peripheral logic circuits onto different wafers, enabling higher bit density and faster I/O speeds. The company has successfully mass-produced 32-layer, 64-layer, 128-layer, and 232-layer 3D NAND chips, and in late 2022, launched its fifth-generation 294-layer stacked architecture TLC NAND. In Q1 2026, YMTC's quarterly revenue reportedly exceeded 20 billion yuan.
Yangtze Memory Technologies Company, Ltd. is an active litigant, primarily as a plaintiff in patent infringement cases. The company has one tracked case as a plaintiff and zero as a defendant. The sole tracked case, Yangtze Memory Technologies Company, Ltd. v. Micron Technology, Inc. et al., was filed on November 9, 2023, in the U.S. District Court for the Eastern District of California. This lawsuit alleges that Micron infringed multiple YMTC patents related to 3D NAND flash memory and DRAM products, specifically targeting Micron's 96-, 128-, 176-, and 232-layer 3D NAND flash and some DDR5 SDRAM products. YMTC seeks to stop Micron from selling infringing products in the U.S. and to obtain patent royalties.
This litigation posture suggests YMTC is asserting its patent portfolio against competitors. The U.S. government added YMTC to the Entity List in December 2022 due to national security concerns, effectively limiting its access to U.S. technology and markets. Amidst this geopolitical context, YMTC's patent litigation against Micron is seen by some market observers as a strategic move to gain leverage against U.S. government actions rather than solely for financial gain. In addition to the patent suit, YMTC also filed a separate complaint in June 2025 in the District of Columbia against Micron, accusing it of an "astroturfing" campaign to damage YMTC's reputation and business, leading to its exclusion from the U.S. market. The company has also pursued patent enforcement in other jurisdictions, including the UK.