TSMC is reviving a Taiwan site it once walked away from. According to Tech Times, the chipmaker is bringing the Longtan complex back into its plans for both 1.4nm fabrication and CoWoS advanced packaging, at a moment when capacity for each is sold out globally.
Reporting circulated via MSN adds detail on the scale: the Longtan Science Park expansion is moving closer to approval, and supply chain sources describe plans for two to three fabs producing TSMC's 1.4nm A14 process, plus two CoWoS advanced packaging plants. The Taoyuan location, per that account, had previously been rejected.
Two pieces of jargon are worth unpacking. "1.4nm" — which TSMC brands A14 — is a marker for the company's next major leap in transistor density, the kind of node that ends up inside flagship phones and AI accelerators. CoWoS, short for chip-on-wafer-on-substrate, is the packaging technique that stitches logic chips together with high-bandwidth memory. It has become the choke point for AI hardware: you can fabricate all the silicon you want, but without CoWoS capacity it cannot be assembled into a finished AI processor.
That's the significance of putting both on one site. The sources describe leading-edge manufacturing and the packaging step that has bottlenecked AI chip supply landing together in one Taoyuan complex, and describe demand for both as already spoken for.
The caveat: this is reporting drawn from supply chain sources on a project described as nearing approval, not a confirmed TSMC announcement, and neither source gives a construction timeline or production date.
It matters because TSMC's capacity decisions effectively set the ceiling on how many advanced AI chips the world can build — and reviving a site it once passed on suggests the company is scrambling for room.