Mainland China’s 3D NAND flash memory manufacturer, Yangtze Memory Technologies Co. (YMTC), filed a lawsuit against the U.S. memory chip leader, Micron Technology, on November 9th in the Northern District Court of California. The lawsuit accuses Micron of infringing upon eight of YMTC’s U.S. patents related to 3D NAND technology.

According to ICsmart, the patents involved in this case from YMTC include US10,950,623 (3D NAND memory device and method of forming the same), US11,501,822 (Non-volatile storage device and control method), US10,658,378 (Through-array contact [TAC] for three-dimensional memory devices), and US10,937,806 (Through-array contact [TAC] for three-dimensional memory devices), US10,861,872 (Three-dimensional memory device and method for forming the same), US11,468,957 (Architecture and method for NAND memory operation), US11,600,342 (Method for reading three-dimensional flash memory), and US10,868,031 (Multiple-stack three-dimensional memory device and fabrication method  thereof).

In the complaint, YMTC alleges that Micron’s 128-layer, 176-layer, and other series of 3D NAND technology have violated eight patents owned by YMTC. Micron is accused of using YMTC’s patented technology without authorization to compete with YMTC, protecting market share and impeding YMTC’s interests, thereby inhibiting innovation.

In recent years, with the stacking of 3D NAND technology reaching 128 layers and even higher, the chip area occupied by peripheral CMOS circuits may exceed 50%. To address this issue, YMTC introduced its proprietary innovative Xtacking technology in 2018.

Established in July 2016 and headquartered in Wuhan, Hubei, YMTC is an IDM (Integrated Device Manufacturer) specializing in the design and manufacturing of 3D NAND flash memory. It also provides comprehensive memory solutions.

Under the shadow of the ongoing US-China tech rivalry, Micron Technology adopted a low-key approach at this year’s Import Expo in Shanghai. During a meeting with Micron’s CEO, Sanjay Mehrotra, Chinese Minister of Commerce Wang Wentao on November 1st welcomed Micron’s continued presence and expansion in the Chinese market, emphasizing the importance of adhering to Chinese laws and regulations for sustainable development. Mr. Mehrotra expressed the company’s willingness to further invest in China.

However, on May 21st this year, China’s Cyberspace Administration announced serious cybersecurity issues with Micron’s products sold in China. These products didn’t pass the review, leading Chinese operators to halt the purchase of Micron’s products. This indicates a potential ban on Micron’s products in the Chinese market.

In October 2022, the US imposed exprt restrictions on advanced chip manufacturing equipment, including placing 36 Chinese companies such as YMTC on an entity list.

(Photo credit: iStock)

Following China’s Big Fund’s substantial $14.56 billion RMB investment in Changxin Xinqiao Storage Technology, a memory chip manufacturer, at the end of October, there are now reports of an additional $39 billion RMB injection.

China is actively building a domestic semiconductor supply chain, and according to Nikkei Asia, Changxin Xinqiao is set to utilize this funding to expedite the construction of its facility in Hefei, Anhui province, with the aim of achieving mass production within a span of three years.

Hefei is also the location of a production facility for ChangXin Memory Technologies (CXMT), a major semiconductor manufacturer specializing in DRAM production. Changxin Xinqiao shares some shareholders and its general manager with CXMT, according to Tianyancha.

Chinese media points out that Changxin Xinqiao has ambitious plans to produce DRAM chips in Hefei, destined for use in computers and a wide array of electronic devices. At present, Changxin Xinqiao has initiated the tendering process for new facility equipment and is poised to accelerate procurement and related procedures using the recently acquired funding.

With support from the Hefei City government, Changxin Xinqiao initiated the DRAM factory construction project in 2019 and laid out a policy to make use of domestically manufactured semiconductor production equipment.

(Image: CXMT)

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• [News] With two October Investments, Big Fund Phase II Commits Nearly 19 Billion RMB
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Report to Voice, After the release of the Huawei Mate 60 Pro, various components have begun to experience the long-lost sensation of surging demand, replenishment, and stockpiling. With the launch of the Apple iPhone 15, the once sluggish global consumer electronics market has suddenly come back to life. The current mindset among storage manufacturers is clear: regardless of whether there is a real or perceived shortage, the goal before the year-end is to raise prices until they are no longer incurring losses.

Leading storage giants have gone through a series of price drops, losses, and production reductions, and are now officially entering the “price hike” phase. Samsung, SK Hynix, Micron, and others have already expressed their intention to raise NAND Flash contract prices.

According to TrendForce latest price projection on NAND Flash, in response to persistent softening in demand, Samsung has taken a decisive step: a sweeping 50% production cut from September, with the focus mainly on processes under 128 layers. Other suppliers are also expected to follow suit and increase their production cutbacks in the fourth quarter to accelerate inventory reduction. With this maneuver in play, Q4 NAND Flash average prices are projected to either hold firm or witness a mild surge, possibly in the ballpark of 0~5%.

YMTC now is facing surging demand from both smartphone and module manufacturers. It is reported that the production capacity for the period up to 1H24 has already been fully booked, with PC and server manufacturers sharing the capacity, while module manufacturers may receive a smaller share.

The current NAND Flash market situation is such that trying to negotiate increased supply with NAND Flash manufacturers like Samsung, Micron, and YMTC may yield little new capacity, and accepting higher prices may be inevitable.

The sudden pre-sale launch of the Huawei Mate 60 Pro has undoubtedly acted as a major catalyst for the current smartphone market. Without it, many smartphone supply chain companies believed that the smartphone market wouldn’t recover until the second half of 2024, and the most pessimistic among them even doubted if it would improve by 2024. The release of the Huawei Mate 60 Pro and the Apple iPhone 15 has injected a long-awaited warmth into the global smartphone market, reinvigorating the entire smartphone component supply chain.

In recent times, the top-tier iPhone 15 Pro Max from Apple’s iPhone 15 series is expected to be available only in November, which some interpret as a sign of strong demand. However, it is more likely due to production bottlenecks, particularly related to technologies like CIS, which have resulted in limited shipments of the iPhone 15 Pro Max. Overall, the estimated shipment volume for the iPhone 15 series may still reach up to 80 million units.

Is this resurgence in smartphone demand a lasting trend with increased consumer willingness to upgrade, or is it a temporary phenomenon? Optimists and conservatives hold differing views, but what is certain is that the global smartphone shipment volume has entered a mature phase, with limited room for significant growth driven solely by new features. However, the storage capacity in each smartphone continues to increase, providing substantial opportunities for existing supply chain manufacturers.

While new opportunities like automotive and AI have emerged, there is still no demand in any new field that can entirely replace the massive smartphone market. Therefore, the consensus within the global tech industry is that for the economy to rebound, the consumer electronics sector, particularly smartphones, is indispensable at this stage. AI and electric vehicles alone cannot take the place of smartphones. (Image credit: YMTC)

(Source: https://mp.weixin.qq.com/s/cb0kRUpWU6MElLNh9CR9eA)

YMTC has officially notified a 3~5% price increase for NAND Flash in mid-May. However, the initial impact of the price hike is expected to be felt in the enterprise market, and it may take some time to reflect in the consumer spot market.

The semiconductor industry is in the midst of a correction period aimed at tackling inventory challenges, and the memory sector is feeling the impact. Major players in global memory manufacturing, including Samsung, SK Hynix, Micron, and YMTC, have recently disclosed substantial cuts in CAPEX, ranging from 45~50% starting from 4Q22. The most recent financial reports from Micron and Samsung further underscore the industry’s downward trend.

TrendForce highlights that YMTC’s decision to raise prices comes amidst market conditions marked by substantial oversupply in the second quarter. Despite Samsung’s efforts to curtail production, the positive effects of this reduction are not anticipated to materialize until the latter part of the year. Consequently, experts predict a more substantial decline in contract prices for the second quarter of 2023 than initially expected.

The market situation in 2Q23 is still oversupplied, leading to further price declines. Since October of last year, the market transaction price for wafers has been lower than the supplier’s cash cost due to selling pressure. Some suppliers used the opportunity when Samsung announced production cuts to raise the wafer price, which is likely why YMTC made this announcement. TrendForce predicts that as demand gradually recovers in the second half of the year, wafer prices will become more resilient. (Photo credit: YMTC LinkedIn)

According to a Financial Times report on October 24, 2022, as the U.S. Department of Commerce moves to restrict U.S. personnel from supporting semiconductor manufacturing “facilities” located in China to develop or produce chips without Department approval, Yangtze Memory Technologies Co., Ltd. (YMTC) has taken steps to avoid violating the ban and allowed a number of core employees with U.S. citizenship to resign.

YMTC is a domestic NAND flash memory chip manufacturer in China. In 2018, it only possessed the ability to produce 32-layer MLC 64Gb products. At that time, mainstream products offered by international manufacturers were 92-layer/96-layer TLC 256Gb/512Gb. Since then, YMTC has continued to catch up in terms of technology. By 2020, it had the capacity to mass-produce 128-layer TLC 512Gb products. The company’s new X3-9070 product, released in 3Q22, is estimated to have 232 stacked layers, equaling major international manufacturers if only in the amount of layers.

U.S. personnel played a key role in the process of YMTC’s continuous technological breakthroughs including Simon Yang, CEO since 2016. On the eve of the latest U.S. sanctions, Simon Yang resigned as CEO to become managing director. After the ban came into effect, a number of core personnel of U.S. nationality who assisted in the development of process technology resigned in succession. As sanctions continue to roil, technological development at YMTC may be delayed as a result.

Under the influence of the U.S. ban, YMTC not only faces brain drain, but will also experience difficulties expanding mass production of mainstream products and next-generation products. Since the U.S. Department of Commerce not only placed restrictions on equipment utilized to produce 128-layer (or more) NAND flash memory chips, but also maintains a “presumption of refusal” when reviewing the export of such equipment to China, YMTC may be unable to obtain sufficient equipment to produce next-generation 232-layer products or expand the production of mainstream 128-layer products.

As international NAND flash memory chip manufacturers continue to mass-produce products with more than 200 layers and move towards 300+ layers, if YMTC cannot manufacture products over 128 layers because the company continues to be limited by talent and equipment restrictions, the technological divide between YMTC and major international manufacturers will widen again and its recent efforts to keep up with technology will also come to nothing.

（Image credit: Unsplash）