Closing the Arc and Handing Off by Name to CMOS Logics Own Commercial Era

# Closing the Arc and Handing Off, by Name, to CMOS Logic's Own Commercial Era

## 1. What This Series Covered

This series told two genuinely separate but contemporaneous commercial stories: Part A, the first MOS integrated circuits actually shipped as products by General Microelectronics and Electronic Arrays starting in 1964, the density-for-cost tradeoff that made calculator chips commercially viable, the yield and contamination problems that had to be solved before volume shipment was possible, and the turn toward memory that Intel's 1968 founding represented; and Part B, the first commercially dominant linear integrated circuits, from Bob Widlar's uA702 and uA709 through the uA741's internally compensated, short-circuit-protected design and the uA723 and 78xx voltage-regulator families, resting on a precision-matching and trimming discipline that digital logic never needed.

Step 10 and step 11 tied both halves together explicitly: same era, same fabs, often the same companies — Fairchild above all — genuinely different product categories, each riding its own branch of the same underlying integrated-circuit growth curve.

The Full Arc, Named Handoffs at Both Ends 20. What This Series Covered TIMELINE 1963cmos invention 1963, named only1964-68Part A: this series, mos logic1965-71Part B: this series, linear ics~1980cmos logic 1980s, named only this series' own arc sits between two already-covered eras, each referenced here by name and not retold

## 2. A Named Handoff to a Later Commercial Era

This series does not retell `cmos_logic_1980s`, the already-deployed series covering CMOS logic's own commercial era, which picks up the digital-logic thread roughly a decade after this series' Part A closes, once VLSI density and standing-power pressure finally made complementary MOS the dominant logic technology rather than the dormant 1963 patent and paper this series' sibling series, `cmos_invention_1963`, already covers. Readers following the digital-logic thread forward from this series' Part A should go there next; this series' own arc ends here, at the close of the first commercial era for both MOS logic and linear integrated circuits.

Forward Handoff 20. A Named Handoff to a Later Commercial Era STRUCTURE this series' close first commercial mos + linear ic era, 1964-1971ish cmos logic 1980s cmos's own commercial era, roughly a decade later the digital-logic thread continues there, by name, not retold here

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