Patent ID: 7368299
Filing Date: 2008-05-06
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: providing a workpiece; depositing a first magnetic layer over the workpiece; depositing a tunnel insulator over the first magnetic layer; depositing a second magnetic layer over the tunnel insulator, wherein the second magnetic layer, tunnel insulator, and first magnetic layer form a magnetic stack; patterning the second magnetic layer, tunnel insulator, and first magnetic layer, wherein the second magnetic layer comprises a first pattern and the tunnel insulator and the first magnetic layer comprise a second pattern, the second pattern being larger than the first pattern, wherein the second magnetic layer comprises a top surface, and wherein patterning the second magnetic layer comprises a wet etch process; and after patterning the second magnetic layer, forming a conductive cap layer over at least a substantial portion of the top surface of the second magnetic layer.