Full Custom - Drawing Transistors The Hard Way
summary
Covers full‑custom analog layout with concrete, usable rules: five layout rules (avoid long aspect ratios, use dummy devices, interleave for matching, prioritize power over signal, enforce metal directions) and three practical tips (copy standard cells, leave space, write scripts). Demonstrates Magic and Cadence workflows, mentions SkyWater 130 and FinFETs, quantifies small effects like adding metal to gain 5–10 ps delay, notes lack of open‑source EMIR tools, and reports actual taped‑out silicon that works.
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chapters (14)
- 0:00Full custom layout intro
- 2:25Why choose full custom
- 3:48Five layout principles
- 7:18Matching devices for yield
- 9:27Power vs signal routing
- 10:30Metal direction and thickness
- 11:32Tips to speed up layout
- 12:35Circuit performance via layout
- 14:19Q&A: bad layout
- 15:25Q&A: matching pairs
- 16:29Q&A: via dropping scripts
- 17:11Q&A: open-source PDKs
- 17:54Q&A: async layout
- 19:17Closing remarks
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