Tower Semiconductor's stronger-than-expected capacity expansion lets it fill more optical-chip orders itself, reducing customers' incentive to move to foundries they regard as technologically weaker. Its hybrid bonding packs dense connections between photonic chips and their driver electronics, an advantage viewed as effectively unmatched among Western suppliers. Tower remains one of the highest-conviction holdings despite the portfolio trim. x.com 

BE Semiconductor Industries is a good long on its supply-chain importance, as recent Lam Research and Applied Materials news validates how important hybrid bonding is to advanced packaging. Upside looks more limited, though; it is unlikely to rise 300% like names such as Applied Optoelectronics. x.com 

Hanmi Semiconductor is expensive, and its surge reflects demand pulled forward. Once that ends, late buyers become exit liquidity. x.com  x.com 

Hanmi Semiconductor, the HBM TC bonder maker and a key SK hynix supplier, is a core AI memory pick, and its insiders look like they know something. Its CEO has bought $8M of stock this year even at elevated levels after a 5x rise in 12 months, and accumulated regularly last year. x.com  x.com  x.com 

Kulicke and Soffa is mispriced because JEDEC's relaxation to 775μm extends thermocompression bonding into HBM4 and HBM5, which is KLIC's field. Its fluxless TCB tools, which with ASMPT's aim to delay hybrid bonding adoption, are a structural tailwind the market reads as a delay risk. The stock has been a chronic disappointer for about three years on wirebonder cyclicality, and the dominant TCB narrative belongs to BESI and ASMPT. x.com 

Per FTR Investors, Applied Materials' larger stake strengthens BE Semiconductor's partnership in hybrid bonding and advanced AI chip packaging, supporting a bullish view. Applied Materials is increasing its stake from 9% to about 20%. x.com 

Logic folding could create more hybrid-bonding demand for BE Semiconductor than shorter HBM stacks take away. Customers are requesting four- or six-die stacks because HBM is expensive; fewer layers need fewer bonding steps and fit packages more easily with conventional solder, weakening the near-term HBM opportunity. Vertically stacked logic still needs exceptional alignment as it shortens signal paths and cuts energy use. x.com 

BESI should see a huge hybrid bonding order wave, especially from HBM4E and HBM5 roadmaps, and its price is compelling after the July selloff. x.com 

ASMPT should outperform BE Semiconductor over the next two years because hybrid bonding for HBM has slipped toward 2028, keeping older bonding in use longer. At Hot Chips 2026, SK hynix signaled it will extend MR-MUF through 16-high HBM4; per Yole, wafer-to-wafer hybrid bonding arrives around 2028. ASMPT specializes in the conventional bonding that is sticking around; BESI loses its main near-term driver. BESI is no slam-dunk short, since Intel's Diamond Rapids uses hybrid bonding in chiplets. … Show more

Micron is the more compelling memory maker on hybrid bonding because it is trying to win market share while Korean rivals rest on their laurels. x.com