Patent ID: 9136463
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A method comprising: forming a magnetic tunnel junction (MTJ) structure including a conductive layer on a substrate; depositing a sacrificial layer on the conductive layer, the sacrificial layer comprising silicon carbon; depositing an amorphous carbon layer on the sacrificial layer, the sacrificial layer selected to have a chemical structure having substantially no impact on a resolution of a pattern definition with respect to the amorphous carbon layer; depositing one or more hard mask and photo-resist layers on the amorphous carbon layer deposited on the sacrificial layer, the amorphous carbon layer located between the sacrificial layer and the one or more hard mask and photo-resist layers; patterning and removing the one or more hard mask and photo-resist layers and the amorphous carbon layer; and depositing a non-magnetic spacer film on an exposed portion of the sacrificial layer, wherein the sacrificial layer is comprised of the same material as the non-magnetic spacer film.