Patent ID: 9070868
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. A thermally assisted magnetoresistive random access memory device, comprising: a magnetic tunnel junction; contact wiring having a top contact electrode and a bottom contact electrode, the contact wiring providing write bias to heat the magnetic tunnel junction; and a multilayer dielectric encapsulant configured to retain the heat within the magnetic tunnel junction; wherein the multilayer dielectric encapsulant comprises at least a first dielectric material and a second dielectric material the first dielectric material being adjacent to the second dielectric material; wherein the first dielectric material and the second dielectric material have different crystal structures, in which one is amorphous dielectric material and another is crystalline dielectric material; wherein the multilayer dielectric encapsulant extends both below and above a height of the magnetic tunnel junction; wherein the first dielectric material is deposited by a first deposition technique; and wherein the second dielectric material is deposited by a second deposition technique different from the first deposition technique; wherein the first dielectric material and the second dielectric material have different Young's modulus numbers.