Patent ID: 9418994
Filing Date: 2016-08-16
CPC Classification: H01L

Claim Text:
1. A fin field effect transistor (FinFET) device structure, comprising: a substrate, wherein the substrate comprises a first region and a second region; an isolation structure formed on the substrate; first fin structures formed on the first region, second fin structures formed on the second region, wherein the number of the first fin structures is greater than the number of the second fin structures; and remaining fin structures formed on the second region, wherein the remaining fin structures are completely covered by the isolation structure; wherein the first fin structures have a first height which is measured from a top surface of the isolation structure to a top surface of the first fin structures; the second fin structures have a second height which is measured from a top surface of the isolation structure to a top surface of the second fin structures, and a gap between the first height and the second height is in a range from about 0.4 nm to about 4 nm.