1. Overview Wafer-Scale Integration (WSI) is not an original concept of Cerebras. In 1980, Gene Amdahl, the father of the IBM mainframe, founded Trilogy Systems, attempting to manufacture an entire wafer as a single processor. Trilogy raised $230 million from entities including IBM and Sperry Rand — the largest startup financing in Silicon Valley history at the time — but during prototype testing, the entire wafer short-circuited upon power-up and burned to a dim red glow, metal wiring layers delaminated, and the thermal solution failed completely. Combined with a devastating fab flood and the sudden death of the company president, along with Amdahl himself being seriously injured in a car accident, Trilogy ended in total failure five years after its founding. In the same period, Texas Instruments, ITT, and the U.S. National Security Agency (NSA) all attempted the WSI route, but the shared conclusion was: manufacturing a commercial wafer-scale chip would require 99.99% fabrication yield — something considered impossible to achieve for at least 100 years at the time. ...
