Abstract:
A semiconductor device, including: a substrate having a first semiconductor material; a second semiconductor layer on the substrate; a third semiconductor layer on the second semiconductor layer and being a device formation region; an isolation structure on both sides of the third semiconductor layer and on the substrate; and an insulating layer below the source and drain regions of the third semiconductor layer and between the isolation structure and the ends of the second semiconductor layer.
Abstract:
Provided is a method for manufacturing a fin structure. The method may include forming an initial fin on a substrate, forming a dielectric layer on the substrate to cover the initial fin, planarizing the dielectric layer by sputtering, and further etching the dielectric layer back to expose a portion of the initial fin, wherein the exposed portion serves as a fin.
Abstract:
A method for manufacturing a dummy gate in a gate-last process and a dummy gate in a gate-last process are provided. The method includes: providing a semiconductor substrate; growing a gate oxide layer on the semiconductor substrate; depositing bottom-layer amorphous silicon on the gate oxide layer; depositing an ONO structured hard mask on the bottom-layer amorphous silicon; depositing top-layer amorphous silicon on the ONO structured hard mask; depositing a hard mask layer on the top-layer amorphous silicon, and trimming the hard mask layer so that the trimmed hard mask layer has a width less than or equal to 22 nm; and etching the top-layer amorphous silicon, the ONO structured hard mask and the bottom-layer amorphous silicon in accordance with the trimmed hard mask layer, and removing the hard mask layer and the top-layer amorphous silicon.