Patent ID: 9530674
Filing Date: 2016-12-27
CPC Classification: C23C,H01J,H01L

Claim Text:
1. A method of filling a trench in a semiconductor wafer, the method comprising: performing a first directional plasma treatment with a first ion beam at a first angle with respect to a sidewall of the trench to form a treated portion of the sidewall and an untreated bottom of the trench; depositing a material in the trench directly on the treated portion of the sidewall and the untreated bottom of the trench, wherein a deposition rate of the material on the treated portion of the sidewall is different than a second deposition rate on the untreated bottom of the trench, and wherein the material is deposited using a technique selected from the group consisting of chemical vapor deposition (CVD), physical vapor deposition (PVD), plasma-enhanced chemical vapor deposition (PECVD), and atomic layer deposition (ALD); and performing a second directional plasma treatment with a second ion beam at a second angle with respect to a sidewall of the trench to perform an angled ion beam etching upon the deposited material.