Patent ID: 9054300
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A method of fabricating a thermally assisted magnetoresistive random access memory device, comprising: forming a magnetic tunnel junction; disposing contact wiring having a top contact electrode and a bottom contact electrode, the contact wiring providing write bias to heat the magnetic tunnel junction; forming a multilayer dielectric encapsulant configured to retain the heat within the magnetic tunnel junction, wherein the multilayer dielectric encapsulant surrounds the magnetic tunnel junction; wherein the multilayer dielectric encapsulant includes at least a first dielectric material and a second dielectric material the first dielectric material being adjacent to the second dielectric material; improving interfacial thermal resistance of the multilayer dielectric encapsulant by configuring the first dielectric material and the second dielectric material to comprise differences of: the first dielectric material and the second dielectric material are different materials; the first dielectric material and the second dielectric material have different lattice constants; and the first dielectric material and the second dielectric material have different crystal structures, wherein one is amorphous dielectric material and another is crystalline dielectric material.