Patent ID: 9368349
Filing Date: 2016-06-14
CPC Classification: H01L

Claim Text:
1. A method of performing a self-aligned litho-etch (SALE) process, comprising: forming a spacer material over a substrate comprising a multi-layer hard mask having a first layer and an underlying second layer to provide a first cut layer comprising the spacer material at a first cut position; forming a reverse material over the spacer material to form a second cut layer comprising the reverse material at a second cut position over the substrate; forming a second plurality of openings, cut according to the second cut layer, to expose the second layer at a second plurality of positions corresponding to a second plurality of shapes of a SALE design layer; forming a first plurality of openings, cut according to the first cut layer, to expose the second layer at a first plurality of positions corresponding to a first plurality of shapes of the SALE design layer; and etching the second layer according to the first plurality of openings and the second plurality of openings.