| shrink_rate | 0.81 | 工艺收缩率 |
| mem_rate | 0.9 | memory rate |
| aspect_ratio | 0.6 | layout宽高比 |
| distance-micron | 2000 | |
| urate | 0.67 | logic rate |
before shrink: area(mm2) = (logic/urate+ram/mem_rate)/1000000
after shrink: area(mm2) = [(logic/urate+ram/mem_rate)/1000000]*shrink_rate