Patent ID: 8790935
Filing Date: 2014-07-29
Classification: H01L

Abstract:
1. A method of manufacturing a magnetic tunnel junction, comprising: forming a metal filled first via in a first insulating material; performing a sputter of the metal filled first via and the first insulating material at different rates to form a recess comprising a first surface of the metal filled first via out of plane with a second surface of the first insulating material; patterning a first conductive layer on the metal filled first via and first insulating material; forming a magnetic tunnel junction layer on the first conductive layer; forming a second conductive layer on the magnetic tunnel junction layer, wherein the recess is duplicated in each of the first conductive layer, the magnetic tunnel junction layer, and the second conductive layer; and patterning the second conductive layer and the magnetic tunnel junction layer to form a conductive electrode overlying a magnetic tunnel junction, the position of the conductive electrode and the magnetic tunnel junction determined by aligning the patterning with the recess.