Patent ID: 9543510
Date: 2017-01-10
CPC Classifications: H01L

Claim:
1. A multi-layer phase change material, comprising: a multi-layer film structure, said multi-layer film structure comprising a plurality of periodic units, said periodic units each comprising a first single-layer film phase change material and a second single-layer film phase change material, wherein: said first single-layer film phase change material and said second single-layer film phase change material are alternately stacked and are in contact with each other; each of said first single-layer film phase change material and said second single-layer film phase change material is changeable from an amorphous state to a crystalline state by a first electric pulse and is changeable from the crystalline state to the amorphous state by a second electric pulse; said first single-layer film phase change material consists of a first plurality of chemical components; said second single-layer film phase change material consists of a second plurality of chemical components; said first plurality of chemical components are the same as said second plurality of chemical components and a percent composition of said first plurality of chemical components is different from a percent composition of said second plurality of chemical components; a crystal structure of said first single-layer film phase change material and a crystal structure of said second single-layer film phase change material belong to a same lattice system; and a lattice mismatch between said first single-layer film phase change material and said second single-layer film phase change material is less than 10%.