Patent ID: 8535954
Filing Date: 2013-09-17
Classification: B82Y,G11C,H01F,H01L

Abstract:
1. A method for fabricating a magnetoresistive random access memory (MRAM) element, comprising: providing a substrate; depositing a first insulating layer on the substrate; forming a bottom electrode in the first insulating layer; depositing a second insulating layer on the first insulating layer and the bottom electrode; forming a first via hole in the second insulating layer; forming an annular reference layer in the first via hole; filling the first via hole with a first gap fill material layer; depositing a barrier layer on the second insulating layer, the annular reference layer and the first gap fill material layer; depositing a third insulating layer on the barrier layer; forming a second via hole in the third insulating layer; forming an annular free layer in the second via hole; filling the second via hole with a second gap fill material layer; and forming a top electrode on the annular free layer.