Patent ID: 8716080

Claim:
A method of manufacturing a semiconductor device, the method comprising: (a) providing a first substrate having a first semiconductor layer and a first hard mask layer on the first semiconductor layer, wherein the first semiconductor layer comprises a first region and a second region, the first region being formed of a first semiconductor material, the second region comprising a layer that is formed of a second semiconductor material different from the first semiconductor material and is formed when the first hard mask layer is being formed; (b) forming a second mask layer having a first pattern and a second pattern on the first hard mask layer, the first pattern being located on the first hard mask over the first region and the second pattern being located on the first hard mask over the second region; and (c) etching the first hard mask layer and the first semiconductor layer using the second mask layer as a mask to form a first fin in the first region and a second fin in the second region such that the first fin comprises a layer formed of the first semiconductor material, and the second fin comprises a layer formed of the second semiconductor material.