Chip Packaging (CoWoS)

An accelerator is useless until logic and HBM are integrated on an interposer. 2.5D/3D capacity, hybrid bonders and TC bonders gate output.

Interposer→Bonding→Assembly→Module

Tightness score ⓘ

#8 of 56

■ Stable

Supply concentration5

Lead time4

Capex intensity4

Geopolitical exposure5

Pricing power5

Lead time

12–18 mo

Theme 1M

−14.3%

% in uptrend

Metric to watch

CoWoS capacity targets, OSAT overflow orders, and hybrid-bonder shipments.

What would prove us wrong

Weakens if CoWoS expansions run ahead of accelerator demand and OSAT utilisation drops.

Dependencies

Equal-weight · rebased 100 · 1Y

Stocks we track

Who controls this bottleneck

Roles, not recommendations. Delayed prices; local currency.

Stock	Role	Listing	Last	1D	1M	3M	YTD	Off 52w high	Next earnings
TSM Taiwan Semiconductor	Leading-node foundry and CoWoS packaging chokepoint	NYSE Taiwan	$405.5	−1.90%	−5.7%	−4.6%	+34.5%	−16.5%	2027-01-14
ASX ASE Technology	Largest OSAT; takes CoWoS-class overflow	NYSE Taiwan	$36.29	−4.05%	−18.1%	−8.2%	+127.7%	−23.8%	2026-10-29
AMKR Amkor Technology	Advanced packaging OSAT incl. US capacity	NASDAQ US	$37.12	−2.57%	−17.2%	−37.0%	−5.5%	−60.2%	2026-10-26
BESI.AS BE Semiconductor	Hybrid bonding equipment leader	Euronext Netherlands	€158.1	−1.06%	−9.4%	−33.5%	+18.9%	−50.7%	2026-10-22
042700.KS Hanmi Semiconductor	TC bonders for HBM stacking	KRX Korea	₩181,900	−1.14%	−16.4%	−11.5%	+43.2%	−55.6%	2026-10-30
6146.T Disco	Dicing and grinding for thin wafers and HBM	TSE Japan	¥47,370	−0.44%	−19.1%	−18.7%	−0.8%	−46.3%	2026-10-22

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