The AI Infrastructure Stack
Overview  /  Tier V Silicon  /  Layer 13: Advanced Packaging
Sub-category 13.2

OSAT — Outsourced Assembly & Test

The packaging houses that handle the non-leading-edge majority of the world’s chips, plus growing AI-adjacent work.

Players

Players: ASE Technology ASX, Amkor Technology AMKR, JCET 600584.SS, Powertech Technology (PTI) 6239.TW, ChipMOS IMOS, Tongfu Microelectronics 002156.SZ, King Yuan Electronics 2449.TW

Analysis coming soon — this page is scaffolding for deeper research into osat — outsourced assembly & test.