hbm4

KB Securities released a report on September 11, indicating that Samsung Electronics' HBM market share is expected to increase from 33% in the second quarter to 40% in the fourth quarter, mainly due to HBM4 sales in the third quarter growing more than three times quarter-on-quarter, and HBM4 is expected to account for over 60% of its total HBM sales in the second half of the year.Samsung Electronics has established comprehensive mass production of HBM4, supplied HBM4E samples to core customers, adopted the HBM5 architecture with 1c core bare chips and 2-nanometer base bare chips, and outlined the roadmap for the next-generation ZHBM. In terms of its foundry business, the 4-nanometer yield has stabilized above 80%, and the 2-nanometer GAA yield has rapidly increased to over 70%. KB Securities analyst Kim Dong-Won stated that the foundry business is expected to turn profitable starting in the third quarter, and the 2-nanometer yield may help it secure orders from major U.S. clients within the year.

Samsung Electronics' wafer foundry division has recently surpassed 50% in the allocation of production capacity for the sixth-generation high bandwidth memory HBM4 substrate chips in the 4-nanometer process. The industry states that this division will invest more than half of its 4-nanometer wafers into HBM4 substrate chip manufacturing in the second half of this year to expand supply to companies like NVIDIA, Broadcom, and AMD.Samsung initiated mass production and shipment of HBM4 in February this year and plans to increase supply starting from the third quarter, significantly increasing the related wafer input since mid-year. This chip is based on Samsung's wafer foundry 4-nanometer (SF4) process. As of last month, over 50% of its total 4-nanometer capacity has been allocated to HBM4 substrate chips. According to insiders, Samsung's 4-nanometer process is currently at full capacity, with HBM4 substrate chips accounting for about 50% to 60%, and this high proportion will be maintained in the second half of the year.Samsung's wafer foundry production lines at Pyeongtaek Plant 2 and Plant 3 are mass-producing processes ranging from 4 to 7 nanometers, with a monthly capacity of about 30,000 wafers for the 4-nanometer process. Based on this, the wafer input related to HBM4 substrate chips is estimated to be about 15,000 wafers per month. During the second quarter earnings call, Samsung stated that it expects HBM4 revenue to increase more than threefold quarter-over-quarter in the third quarter, with HBM4 revenue in the second half expected to exceed 60% of the company's overall HBM revenue.

According to South Korean media reports, Samsung Electronics is cooperating with Nvidia (NVDA.O) to develop 8-layer seventh-generation high bandwidth memory (HBM4E), significantly reducing the stacking height compared to the original plans of 12 layers and 16 layers. The speed specification proposed by Nvidia is 17-18Gbps, which is about 20% higher than Samsung's initial HBM4E sample speed of 14.4Gbps. This product is reported to be used for NVHBM.

SemiAnalysis released the latest episode of its podcast, which pointed out that SK Hynix and Micron have been facing challenges in achieving the highest HBM4 speeds. In particular, SK Hynix had to redesign its base chip, resulting in delays in HBM4 deliveries to the NVIDIA Rubin platform.Samsung currently has the best HBM4 technology. Broadcom has traditionally relied heavily on Samsung for its HBM supply. Samsung's performance in the HBM3E generation was poor, which posed a disadvantage for Broadcom's ASICs. However, now Samsung is leading its competitors with HBM4, and this same supply chain relationship has become an advantage for Jalapeño.

According to reports from Seoul Economic Daily, Samsung Electronics is developing HBM4E (seventh generation) 8-layer products that meet NVIDIA's requirements, aiming to secure its position as a core partner in the supply of customized high-bandwidth memory NVHBM. This product reduces the stacking height compared to the originally planned 12-layer and 16-layer designs. The speed specifications proposed by NVIDIA are 17-18Gbps, which is about 20% higher than the speed of Samsung's initial HBM4E samples (14.4Gbps), and will be used for NVIDIA's publicly disclosed NVLink optimized specifications for NVHBM.The use of 8 layers, contrary to the previous logic of increasing capacity by adding more stacking layers in HBM, can reduce the difficulty of post-processing and yield pressure, which is beneficial for expanding supply and is seen as NVIDIA's strategy to alleviate memory shortages. NVHBM is expected to be applied starting with the next-generation AI GPU "Rubin Ultra," which is set to launch next year. This GPU will expand the interconnection scale between GPUs from a maximum of 72 to 576, enhancing overall computing power through hundreds of GPUs equipped with faster HBM.In the customized HBM market, Samsung is more competitive compared to SK Hynix and Micron, as NVHBM requires DRAM and the production capabilities of logic chip-based bare die designs, which Samsung can integrate. Industry insiders say that Samsung has verified the highest speed levels in HBM4, which can provide an advantage in speed competition.

Samsung Electronics and SK Hynix plan to increase the supply of 8-layer HBM4 memory to NVIDIA in the second half of this year.This move is influenced by NVIDIA's supply strategy, aiming to ensure a stable supply of HBM memory while also considering product heat generation.

SemiAnalysis reported that the Nvidia Rubin Ultra will feature 192GB of HBM4 8-hi memory. This is not only a significant reduction from the initially previewed 1TB HBM but is even lower than the 288GB capacity of the standard Rubin.The reasons for the HBM configuration being cut down to about one-fifth of the original include: the cancellation of the four-die Rubin Ultra scheme, reducing the number of cubes to 8; the stacking height being lowered from 16-hi to 8-hi; and the use of HBM4 with 24Gb dies instead of HBM4E with 32Gb dies. An upgraded version with 8-hi HBM4E may be released later.

According to UBS's analysis of the Vera Rubin superchip Bill of Materials (BOM), the share of memory semiconductors in the total cost of the platform has risen to about 62%, a significant increase from the 53% of the previous generation Blackwell Ultra (GB300). The total cost of the Vera Rubin superchip (which includes 1 Vera CPU and 2 Rubin GPUs) is approximately $38,902, with memory-related costs reaching $24,297. The cost of HBM4 is about $4,943 (accounting for 12.7% of the total cost), while the cost of the SOCAMM2 connecting the CPU is about $19,355 (accounting for 49.8% of the total cost), making it the core driver of rising memory costs.SOCAMM2 is a server memory module based on low-power DRAM LPDDR5X, supporting a maximum capacity of 1.5TB per CPU. The Vera Rubin NVL72 cabinet (which includes 72 Rubin GPUs and 36 Vera CPUs) is equipped with a total of 74.7TB DRAM, of which HBM4 accounts for 20.7TB, and LPDDR5X for the CPUs reaches 54TB, with the LPDDR usage in a single cabinet equivalent to about 4,500 high-end smartphones. However, due to uncertainties in the supply of LPDDR5X and HBM4E, NVIDIA is considering reducing the HBM configuration for the next generation Rubin Ultra.

Samsung Electronics released its Q2 2026 financial report, with revenue of 171.5 trillion Korean won (approximately $118.8 billion), a year-on-year increase of 130%, and a quarter-on-quarter increase of 28%, setting a new record for a single quarter; operating profit was 89.5 trillion Korean won (approximately $62 billion), a year-on-year increase of 1813.8%, and a quarter-on-quarter increase of 56.4%, exceeding market expectations by about 5%; net profit was 71.62 trillion Korean won (approximately $49.6 billion), a staggering year-on-year increase of 1299.9%. Earnings per share were 10,849 won, a year-on-year increase of 52%.The Device Solutions (DS) division reported revenue of 127.5 trillion Korean won, with operating profit of 89.2 trillion Korean won, a quarter-on-quarter increase of 56%, driven by demand for AI server memory, with both revenue and profit reaching historical highs. HBM4 has been mass-produced and shipped, and HBM4E samples have been delivered to major customers. The Device Experience (DX) division saw a quarter-on-quarter revenue decline of 9%, with the MX business affected by component cost pressures, reporting revenue of 33.2 trillion Korean won and an operating loss of 0.7 trillion Korean won.Samsung expects strong demand for server DRAM, eSSD, and HBM to continue in the second half of the year, with a tight market supply situation persisting, although demand in the mobile and PC sectors may see some slowdown. The company plans to expand sales of high-value-added products such as HBM4, DDR5, and SOCAMM2, and to mass-produce new mobile products using the second-generation 2nm process, aiming for double-digit revenue growth in its foundry business.