Definition in One Sentence 5 nm smartphone SoC: The last generation FinFET + high-k metal gate, converting the entire power budget that improves performance by 15% into extended battery life. Why It Matters • Compared to 7 nm, transistor density increases by 70%, power consumption for the same tasks decreases by 25%, and battery life increases by 2 hours with unchanged battery capacity. • First integration of A78/X1 large cores + LPDDR5-5500, video playback power consumption decreases by 0.4 W, and screen-on time directly increases by 1 hour. • The GPU area accommodates 24-core Mali-G78, peak frame rate increases by 30%, yet heat generation is lower, preventing frame drops during gaming. Fun Fact / Interview Question Q: Is the improvement in battery life of the 5 nm SoC solely due to transistor density? (The answer will be revealed tomorrow.)
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Answer to Yesterday’s Question: CFET thermal dissipation relies on microchannel water cooling at the back and TSV copper pillar thermal conduction, reducing chip-level thermal resistance by 30%, with the process still under development.
【Silicon Knowledge Calendar · Day 015】 One minute every day, mastering chip knowledge.