Patent ID: 6998150
Filing Date: 2006-02-14
Classification: B82Y,G01R,G11B,H01F,Y10T

Abstract:
1. A method to control magnetostriction of a ferromagnetic free layer, comprising: depositing a first copper layer on a substrate; exposing said first copper layer to oxygen; depositing a second copper layer on said first copper layer; depositing a first ferromagnetic layer on said second copper layer; depositing a third copper layer on said first ferromagnetic layer; exposing said third copper layer to oxygen; depositing a second ferromagnetic layer on said third copper layer; depositing a fourth copper layer on said second ferromagnetic layer; and depositing a third ferromagnetic layer on said fourth copper layer, thereby completing formation of the ferromagnetic free layer, said ferromagnetic free layer having a positive magnetostriction constant.