ASE Technology Holding vs Unimicron: Advanced packaging compared

November 2026 edition · assessment by Frontier Tech Intelligence

ASE Technology Holding ranks 42 on the AI Infra 100 with a score of 91; Unimicron ranks 80 with 86. ASE Technology Holding is ahead on technology and firepower. Unimicron is ahead on leverage. Level on deployment, production, commercials, progress and positioning. ASE Technology Holding is based in Kaohsiung, Taiwan, Unimicron in Taoyuan, Taiwan. ASE Technology Holding is named in 2 signals and Unimicron in 1.

ASE Technology Holding →

Kaohsiung, Kaohsiung, Taiwan · AI Core · Fabrication, memory & packaging / Advanced packaging · aseglobal.com

ASE is a major semiconductor assembly and advanced-packaging provider, with FOCoS, FOCoS-Bridge, CoWoS, system-in-package and FC-BGA capabilities for AI and HPC applications.

AI Infra 100 · rank 42 · score 91

Scores, AI Core (of 10)

Deployment10
Production10
Commercials10
Progress10
Technology8
Positioning8
Firepower10
Leverage8

Darker bar: ahead of the other company on that measure.

Positioning

ASE Technology Holding is a Taiwan-based public OSAT and advanced-packaging provider, positioned among the largest global independent assembly-and-test suppliers and a major alternative to in-house foundry packaging. Its domain activity accelerated through a February-2025 Penang plant launch, May-2025 FOCoS-Bridge-with-TSV technology announcement, October-2025 NT$17.6 billion K18B advanced-packaging factory groundbreaking, May-2026 310mm panel-level packaging line announcement, and May-2026 Analog Devices facility acquisition. ASE supplies or works with named ecosystem participants including NVIDIA through subsidiary SPIL, AMD, Analog Devices and WUS; the open question is how much of its broad packaging revenue is directly attributable to AI accelerators rather than general semiconductor demand.

Latest signals

  • ASE is expanding into post-package testing and full-process packaging for AI chips.Electronics Weekly
  • ASE is ramping on-substrate packaging and chip-probe volumes amid TSMC’s CoWoS shortfall.Electronics Weekly

2 signals name ASE Technology Holding.

Facts, with sources

  • EMS revenue declined 5.2% year over year to NT$257.2 billion, primarily because of slow recovery in general communications and automotive products.sec.gov
  • EMS revenue declined 5.2% year over year.sec.gov
  • ASE and WUS announced a strategic collaboration to build an advanced AI-packaging hub in Kaohsiung focused on FOCoS and FC-BGA capacity.ase.aseglobal.com

17 facts on file.

Unimicron →

Taoyuan, Taoyuan, Taiwan · AI Core · Fabrication, memory & packaging / Advanced packaging · unimicron.com

Unimicron supplies high-end ABF substrates used by semiconductor and accelerator manufacturers in advanced packaging.

AI Infra 100 · rank 80 · score 86

Scores, AI Core (of 10)

Deployment10
Production10
Commercials10
Progress10
Technology6
Positioning8
Firepower8
Leverage10

Darker bar: ahead of the other company on that measure.

Positioning

The largest Taiwanese IC-substrate and PCB maker, main ABF substrate supplier to four US hyperscalers' custom ASICs and to Nvidia and Google; the volume producer under the Ibiden-class high end.

Latest signals

  • ASE, PTI, Amkor, TSMC, SK hynix, Ibiden, and Unimicron are expanding advanced-packaging capacity.Electronics Weekly

1 signals name Unimicron.

Facts, with sources

  • >500mUnimicron via BigGo
  • NT$ 42890000000Unimicron via BigGo
  • High-end ABF substrate sold out; capacity full through year-endDigiTimes

3 facts on file.

More comparisons

Questions this page answers

ASE Technology Holding or Unimicron: which is ahead in ai core?

ASE Technology Holding ranks 42 on the AI Infra 100 with a score of 91; Unimicron ranks 80 with 86. ASE Technology Holding is ahead on technology and firepower. Unimicron is ahead on leverage. Level on deployment, production, commercials, progress and positioning. ASE Technology Holding is based in Kaohsiung, Taiwan, Unimicron in Taoyuan, Taiwan. ASE Technology Holding is named in 2 signals and Unimicron in 1.

How do ASE Technology Holding and Unimicron compare?

ASE Technology Holding ranks 42 on the AI Infra 100 with a score of 91; Unimicron ranks 80 with 86. ASE Technology Holding is ahead on technology and firepower. Unimicron is ahead on leverage. Level on deployment, production, commercials, progress and positioning. ASE Technology Holding is based in Kaohsiung, Taiwan, Unimicron in Taoyuan, Taiwan. ASE Technology Holding is named in 2 signals and Unimicron in 1. Both company files carry the scores on eight measures, the facts with sources and the latest signals.

Every comparison here comes from the same files members use every day.

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