Silicongate 1967 Step 18 Downstream Series Named Handoff

# Name the Downstream Series That Assume This Process, Without Retelling Any of Them

## 1. A Process Assumed, Not Re-Explained, Elsewhere in This Project

This series' own Step 10 already called this process "the canonical foundation of modern VLSI"; this step makes that claim concrete by naming, specifically, which of this project's already-deployed series assume this process as a starting point rather than re-deriving it. This project's cmos_logic_1980s, hmos_1978, and bicmos_logic_1980s series each build on self-aligned, polysilicon-gate MOS fabrication as a given -- none of them re-explains polysilicon deposition, self-alignment, or gate doping, because this series is where that foundation is actually built.

Three Later Series, One Shared Foundation none of the three retells this series' own process content SILICONGATE_1967 self-aligned poly gate steps 1-10, this series the foundation itself HMOS_1978 / CMOS_LOGIC_1980S assume the process scale and refine voltages do not re-derive it BICMOS_LOGIC_1980S combines with bipolar still assumes poly-gate mos does not re-derive it This step names the dependency; the downstream series' own content is not repeated here.

## 2. Why Naming the Dependency Is Worth a Dedicated Step

Without an explicit statement of which later series rely on this one, a reader encountering hmos_1978 or cmos_logic_1980s independently might reasonably assume self-aligned polysilicon-gate fabrication was simply always available -- making the dependency explicit here is what lets this series function as the dedicated origin story those other series only reference by name, exactly the role this extension was written to secure.

Series That Assume This Process as a Given explicit dependency, not duplicated content 90 cmos_logic_1980s 90 hmos_1978 85 bicmos_logic_1980s Each later series depends on this process without re-deriving it -- the dependency this step makes explicit.

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