Nvidia's co-investment supports Samsung Electro-Mechanics' substrate expansion because it expects capacity to be tight when it needs supply. Samsung Electro-Mechanics says dedicated compute and switch substrate supply to Nvidia starts this year, with double-digit annual volume growth; by 2028 Nvidia orders should take a substantial share of its package-substrate capacity. Global customers fund part of its 6.78 trillion won expansion, but new Sejong output starts in September 2028. x.com 

Higher HBM stack requirements favor Samsung Electronics shares, even as the broader semiconductor industry suffers and DRAM is in dire straits. Daishin Securities says plans for 4-high and 6-high HBM in low-end inference appear shelved, while Nvidia's 8-high Rubin option appears dropped amid base-die supply constraints and customers' preference for bandwidth. x.com 

IC substrates are Schmid's more relevant growth driver today because demand is already high and rising. Schmid customers Ibiden and Unimicron are expanding capacity with NVIDIA support; higher order intake supports the prospect of more equipment orders. Its balance sheet has improved, and the risk/reward looks attractive at current levels despite volatility. Glass substrates may take another one to two years to matter commercially. This is a personal assessment, not a buy recommendation. x.com  … Show more

Tight memory supply keeps the AI memory supplier trade in bill-of-materials names if it persists. The investor aleabitoreddit reports an SK hynix shortage outlook through 2030 and an operating-margin result near 80%. HBM allocation and average-selling-price guidance are the next tests; Korea has already priced the earnings print, so the next move depends on who locks capacity. x.com 

Nvidia's need for many trillions of dollars of capacity should benefit its memory, connector and silicon photonics suppliers. Jensen Huang said Nvidia works with every memory vendor because it uses so much memory, and will work with every connector vendor and every silicon photonics company. That points to Applied Optoelectronics, Coherent, Lumentum, Ciena, Fabrinet, Micron, SanDisk and Korean equities. x.com 

SK hynix holds the key to Nvidia's growth because memory is Nvidia's number one bottleneck. Nvidia's 70% revenue growth guide is constrained by memory supply, its purchase commitments jumped from $119 billion to $279 billion mainly for memory, per CFO Colette Kress, and extreme memory pricing is weighing on its gross margin. Jensen Huang says unconstrained growth would be a lot higher. SK hynix leads in HBM3e and is ramping HBM4 for Rubin, ahead of Samsung and Micron. x.com  x.com 

AI server PCB and substrate makers are among the safest, lower-risk, lower-reward ways to play Nvidia's racks. PCB value rose 233% in one NVL72 generation, second only to memory, and Morgan Stanley flagged PCB as the top downstream hardware gainer. Unimicron leads AI server PCB with 18-22% share; Zhen Ding gets nearly 70% of revenue from AI; Victory Giant is the most direct Nvidia PCB play; Elite Material's low-loss CCL passed Nvidia certification. TTM, Tripod, Compeq, WUS and Shennan also gain. … Show more

Korean stocks' medium-term case remains strong as one of the most direct beneficiaries of AI memory, though the short term is crowded, fast-rising and heavily leveraged. Per Reuters, Nvidia and SK Group are set to announce a partnership during Jensen Huang's visit, reinforcing SK Hynix's role as a core HBM supplier, and Huang said memory shortages could last years. The KOSPI fell 5.54% on June 5 right after a high, so watch pullback volume, the won and foreign flows. x.com 

High-grade PCB and low-loss glass-fiber makers Nitto Boseki, Elite Material and Taiwan Union Technology should keep rising as the obvious workaround to an inevitable memory despec for Nvidia's Rubin Ultra and Feynman. All three have more than tripled in the past year, and some are up over 10x in three years. Switching suppliers is harder here than in memory, which is why a few firms dominate, but it is higher risk and new supply coming online has not been analyzed. x.com 

Samsung has the most upside among the three memory makers because it holds memory, foundry and packaging under one roof, letting it shorten development cycles and give customers more options. Its HBM4 collaboration on AMD's MI455X with 432GB of HBM4, plus foundry talks, shows a major AI customer taking it seriously again. Expect strong DRAM, NAND and HBM4 contributions. @JonahLupton notes it trades at 4.4x NTM EPS, and HBM prices rising at least 100% in 2027 may not be in estimates. x.com