Building and civil
Dies per wafer (300 mm)
Die-per-wafer: squares in a circle, so the bigger the die the larger the share thrown away
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
円に四角を詰めるので、端は必ず捨てる。
しかも大きいダイほど、捨てる割合が増える ——同じ 300mm ウェハで、20mm 角なら 148 個・端の捨て 28.8%、40mm 角なら 32 個・同 46.7%。
外周 3mm は端の除外で、そもそも使わない(破線の内側だけが有効)。枡の数は、この図を作るときに実際に数えた。
Source (YAML)
examples/gallery/207-ウェハのダイ取り.zumen.yaml
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