Patent ID: 9324570
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: providing a semiconductor substrate and a hard mask layer, wherein the hard mask layer is disposed on the semiconductor substrate, and the semiconductor substrate has a first region and a second region defined thereon; using a first photomask to form a sacrificial block on the hard mask layer in the first region, a first dummy pattern on the sacrificial block, a first spacer on sidewalls of the sacrificial block and a second spacer on the hard mask layer in the second region; using a second photomask to form a feature mask on the first dummy pattern and a fin cutting mask on the second spacer and the hard mask layer; performing a fin cutting process to remove a portion of the first dummy pattern without being covered with the feature mask, a portion of the sacrificial block underlying the portion of the first dummy pattern and the first spacer to form a dummy feature and a sacrificial feature and to remove a portion of the second spacer without being covered with the fin cutting mask to form a plurality of fin spacers; transferring the fin spacers and the sacrificial feature to the hard mask layer to form a feature hard mask and a plurality of fin hard masks; and transferring the feature hard mask and the fin hard masks to the semiconductor substrate to form a feature structure and a plurality of fin structures.