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CoWoS

TSMC's advanced chip-packaging technology that stacks and interconnects multiple dies and HBM memory on a silicon interposer, widely used in AI accelerators.

Known aliases

  • Chip on Wafer on Substrate
  • Chip-on-Wafer-on-Substrate
  • CoWoS
  • CoWoS-L
  • CoWoS-R
  • CoWoS-S

Current stories

investConfirmed6 publishers

GlobalFoundries signs a five-year silicon interposer deal with TSMC that ramps in 2028

GlobalFoundries signed a five-year deal with TSMC to make silicon interposers, targeting a volume ramp in the first half of 2028. Neither company disclosed pricing, customers or capacity, so the deal cannot yet show how much AI packaging work, if any, is leaving TSMC's own plants.

Perspective Coverage

7 publishers
Builder
Builder 24%
Operator
Operator 38%
Investor
Investor 38%

Reality

Evidence60
Adoption15
Hype gap+20
Incentives55
Confidence65
investOne report1 publisher

Counterpoint's 12-layer Rubin forecast keeps more DRAM wafers tied up in HBM

Counterpoint Research now expects most Nvidia Rubin products to use 12-layer HBM4 instead of the rumored eight-layer stacks. Four more dies per stack keep wafers in HBM as SK hynix and Samsung's 16-layer parts wait on yields and TSMC packaging.

Publishers:koreaherald.com

Reality

Evidence40
Adoption55
Hype gap+25
Incentives
Not scored
Confidence40
investConfirmed3 publishers

TSMC's possible Texas campus hinges on a tax credit worth $7 billion a fab

TSMC is weighing a Texas campus of up to six $20 billion fabs that reportedly hinges on a 35% CHIPS Act tax credit expiring at the end of 2026. At $7 billion a fab, the credit lets Congress set about a third of the price before TSMC's board has voted.

Perspective Coverage

5 publishers
Builder
Builder 14%
Operator
Operator 39%
Investor
Investor 47%

Reality

Evidence55
Adoption10
Hype gap+25
Incentives65
Confidence55
investOne report1 publisher

TSMC's one-quarter revenue gain outran Samsung's entire foundry quarter

Counterpoint puts TSMC at 73% of second-quarter foundry revenue and Samsung Foundry at 5.9%. Because that share is weighted by leading-edge prices, it measures the scarcity of advanced capacity as much as the volume of it.

Reality

Evidence55
Adoption82
Hype gap+12
Incentives50
Confidence58
investOne report1 publisher

Intel's CEO puts the fix for customers' 95% reliance on TSMC on the customers who chose it

Lip-Bu Tan told a Splunk keynote in Denver that relying on one Taiwan-based company for 95% of AI chip production is very risky. The one 14A commitment he can point to, Terafab, ships its first product in mid-2028.

Publishers:en.sedaily.com

Reality

Evidence42
Adoption25
Hype gap+38
Incentives85
Confidence48
investOne report1 publisher

Debt supplies four of every five disclosed dollars in China's AI fundraising

Zhipu closed about $5 billion two months after raising $4 billion in a July share sale. The largest sum in the same tally is the $29.6 billion that ByteDance borrowed from roughly 30 banks at home and abroad.

Publishers:en.sedaily.com

Reality

Evidence30
Adoption35
Hype gap+22
Incentives60
Confidence35
scienceOne report1 publisher

Positron raises $875M for an inference chip built around commodity LPDDR5X instead of HBM

The Reno startup says its Asimov ASIC carries 288 GB of on-package LPDDR5X and realizes more than 90% of its memory bandwidth. Both figures come from the company, and no independent benchmark accompanies them.

Publishers:forkast.news

Reality

Evidence26
Adoption5
Hype gap+58
Incentives74
Confidence54
investOne report1 publisher

Glass, not lithography: Korea's HBM lead rests on a packaging step it does not own

Seoul Economic Daily calls glass substrates the next packaging battleground. The committed dollars it names belong to Intel; the only Korean number in the story is a share price.

Publishers:en.sedaily.com

Reality

Evidence30
Adoption24
Hype gap+46
Incentives66
Confidence38
buildOne report1 publisher

LG sells an OSAT a 1.5-micron maskless imager, betting packaging capacity is the bottleneck

The tool tops out well short of DUV resolution. Its argument is throughput, 600 mm substrates and digital pattern correction while CoWoS supply stays tight.

Publishers:tomshardware.com

Reality

Evidence42
Adoption22
Hype gap+18
Incentives58
Confidence45
buildOne report1 publisher

The chokepoint moved: ABF film, not lithography, now caps China's accelerator output

Ajinomoto has reportedly told mainland customers it will cut supply of high-end packaging film by 30 percent. It holds about 95 percent of that market; China supplies under 5 percent of its own.

Publishers:tomshardware.com

Reality

Evidence52
Adoption34
Hype gap+22
Incentives71
Confidence48