Fabricate Fairchilds Experimental Mos Logic Gate a Second Independent Confirmation

# Fabricate Fairchilds Experimental MOS Logic Gate: A Second Independent Confirmation

## 1. Why a Second Lab Reaching the Same Result Mattered More Than the First

Fairchild Semiconductor's own experimental PMOS logic-gate program, built independently of RCA's shift-register work and using Fairchild's own planar-process oxide expertise, reached a working MOS logic gate on a timeline close enough to RCA's to establish that the result was reproducible across organizations and process lineages, not an artifact specific to one lab's particular oxide batch. This independent confirmation is what actually convinced the wider industry the result was real:

## 2. Real Diagram: What Fairchild's Gate Actually Demonstrated That RCA's Had Not

Where RCA's demonstration emphasized dynamic charge-storage (the shift register's defining trick), Fairchild's gate specifically demonstrated static combinational logic — a NOR/NAND-equivalent function held in a steady state, not dependent on a clock to refresh the stored value, closing a gap RCA's dynamic-only demonstration had left open about whether MOS could do conventional static logic at all.

## 3. What Fairchild's Gate Actually Demonstrated That RCA's Had Not

Between RCA's dynamic demonstration and Fairchild's static one, by 1963 the experimental MOS program had answered both of the obvious open questions — could MOS transistors work together as a circuit, and could that circuit hold a conventional static logic state — leaving only reliability and manufacturability, the subject of the next several steps, standing between demonstration and product.