Patent ID: 9246093
Filing Date: 2016-01-26
CPC Classification: G11C,H01L

Claim Text:
1. A phase change memory cell comprising: a first selection device and a second selection device respectively associated with a first phase change memory cell and a second phase change memory cell, the first and the second selection devices disposed along a wordline direction; a contact region on said selection devices; an interface layer in direct contact with said contact region; an L-shaped vertical heater element in direct contact with said interface layer, wherein said L-shaped vertical heater element includes a curved vertical wall and a horizontal base, wherein the vertical wall and the horizontal base of the L-shaped vertical heater element respectively have a height and a length that perpendicularly extend, and wherein said curved vertical wall of said L-shaped vertical heater element has a width extending perpendicular to a direction of the length of horizontal base and extending along said wordline direction; and a phase change material in direct contact with said vertical heater element, wherein the first and the second selection devices are separated along the wordline direction by a trench isolation that extends into and terminates within a wordline under the first and the second selection devices.