Patent ID: 9627379
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A FinFET device, comprising: a substrate having at least one first fin and at least one second fin in a first region and having at least one third fin and at least one fourth fin in a second region; a first gate across the at least one first fin and a second gate across the at least one second fin, wherein a first end sidewall of the first gate is faced to a second end sidewall of the second gate, and a first opening is formed between the first and second end sidewalls of the first and second gates; and a third gate across the at least one third fin and a fourth gate across the at least one fourth fin, wherein a third end sidewall of the third gate is faced to a fourth end sidewall of the fourth gate, and a second opening is formed between the third and fourth end sidewalls of the third and fourth gates, wherein a pattern density of the first region is different from a pattern density of the second region, and an included angle between a sidewall of the first opening and the substrate is different from an included angle between a sidewall of the second opening and the substrate.