Patent ID: 9048260
Filing Date: 2015-06-02
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, comprising: providing a substrate, wherein the substrate includes a monocrystalline semiconductor material; blanket depositing a first hard mask layer over the substrate; blanket depositing a second hard mask layer over the first hard mask layer; etching the first hard mask layer and second hard mask layer to form a mask; etching the substrate in alignment with the mask to form a fin; blanket depositing a dielectric material over the fin; polishing the dielectric material to be planar with a top surface of the first hard mask layer, wherein the second hard mask layer is removed in the polishing process; etching the dielectric material to expose an active region of the fin; blanket depositing a gate structure material; and etching the gate structure material to form a gate structure, wherein the gate structure wraps around the fin to define a channel region within the fin and source/drain regions on opposite sides of the channel region, and wherein the first hard mask layer protects the top surface of the fin from the etching process.