Patent ID: 9196709
Filing Date: 2015-11-24
Classification: H01L

Abstract:
1. A method comprising: recessing a portion of a semiconductor substrate between opposite isolation regions to form a recess, wherein after the step of recessing, the portion of the semiconductor substrate comprises a top surface comprising: performing an epitaxy to grow a semiconductor material in the recess, wherein the semiconductor material is grown from the flat surface and the slant surface; performing a planarization to level a top surface of the semiconductor material with top surfaces of the isolation regions; after the planarization, performing an annealing; and after the annealing, recessing the isolation regions, wherein a portion of the semiconductor material protrudes over the isolation regions to form a semiconductor fin, and wherein after the recessing the isolation regions, top surfaces of remaining portions of the isolation regions are higher than the top edge of the slant surface.