Patent ID: 9461044
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. A method for fabricating a fin field effect transistor (FinFET), comprising: patterning a substrate to form a plurality of trenches in the substrate and a semiconductor fin between the trenches; forming a plurality of insulators in the trenches; forming a dielectric layer to cover the semiconductor fin and the insulators; forming a dummy gate strip on the dielectric layer, a lengthwise direction of the dummy gate strip being different from a lengthwise direction of the semiconductor fin; forming a pair of spacers on sidewalls of the dummy gate strip; removing the dummy gate strip and thinning the dielectric layer underneath to form a thinned portion between the pair of spacers; and forming a gate between the pair of spacers to cover the thinned portion and sidewalls of the pair of spacers.