Package Cost Console

For most of semiconductor history, packaging was the cheap, unglamorous last step — a plastic shell and some wires to connect a die to a board, a small fraction of total cost that nobody modeled carefully. That era is over. As performance became limited by how fast data moves between chips rather than how many transistors fit on one, the package turned into a first-class engineering and cost problem, and for the most advanced AI parts it can cost as much as the silicon it houses.

The cost structure is the same across technologies even as the magnitude varies: a substrate that fans the die's fine connections out to the board, the interconnect that joins die to substrate, the assembly labor to place and attach everything, and test to catch failures — all divided by assembly yield. What changes between package types is the weight of each term. Wire-bond keeps every term cheap but limits you to perimeter pins; flip-chip adds a bumping process and a dense substrate; fan-out throws away the substrate entirely; and 2.5D adds an expensive silicon interposer to deliver the bandwidth HBM demands.

Choosing among them is an electrical decision with a cost consequence, not the other way around. A high-pin-count, high-bandwidth processor simply cannot use wire-bond, no matter how cheap it is. The discipline is to pick the least expensive technology that actually meets the I/O, bandwidth and thermal requirements — exactly what the side-by-side comparison in this console supports.

This is the entry point to the Packaging & Assembly suite. For the expensive case of HBM-class 2.5D, the CoWoS Cost console models the interposer and memory stacks in detail; and the packaging cost you estimate here feeds into per-chip cost via the Wafer Cost console.