Patent ID: 11876018
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of fabricating a semiconductor device on a substrate, comprising:
forming hard mask pillars on a surface of the substrate;
forming sacrificial spacers on a first side of each hard mask pillar and a second side of each hard mask pillar, wherein open gaps are formed between adjacent sacrificial spacers;
etching the hard mask pillars to form pillar gaps;
etching gate trenches into the substrate through the open gaps and the pillar gaps;
forming a gate electrode within the gate trenches;
implanting channels and sources in the substrate below the sacrificial spacers;
forming an insulator layer around the sacrificial spacers;
etching the sacrificial spacers to form contact trenches within the substrate; and
filling the contact trenches with a conductive material to form contacts.