Chinese semiconductor memory giant YMTC is reportedly manufacturing anywhere between 400-500,000 wafers per year of leading-edge NAND memory, all on domestically produced wafers. According to Mayuki Hashimoto, CEO and Chairman of SUMCO, a Japanese company supplying raw silicon ingots and polished wafers, they are seeing a significant business impact stemming from China's growing self-reliance, especially with companies like YMTC producing its own silicon ingots and polished wafers. This has led to SUMCO's decreasing revenue, where the CEO shared some insights about Chinese ambitions. He added that China is producing about one million wafers of silicon per year, most of which are test wafers. This includes test runs from companies like SMIC and its customers, such as T-Head, HiSilicon, and others.

Last year, YMTC, with its Xtacking 4.0 3D NAND flash architecture, was the first company to achieve a 200+ layer count in the 3D NAND space. The company's product, X4-9070, a 232-layer TLC 3D NAND, uses multiple silicon wafers, hence growing its massive consumption of silicon that is projected to reach 500,000 wafers per year. Given that this is all homegrown silicon from ingots to NAND, this is a massive success for Chinese self-reliance efforts but a huge blow to companies that used to supply Chinese firms with raw materials. Although the company uses custom silicon, it still relies on foreign tools, photoresists, and pre-cursors. There are some indications that YMTC is developing its own tools; it is a plan of a broader strategy in the Chinese semiconductor industry to develop every step of the semiconductor manufacturing process. Huawei is also there to develop EUV scanners, and YMTC could help with its memory business, which is in need of a new tool.