Patent ID: 9627395
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A method of manufacturing a monolithic three-dimensional memory device, comprising: forming a stack including an alternating plurality of first material layers and second material layers over a substrate; forming an opening that vertically extends through the stack; forming a semiconductor channel comprising an amorphous or polycrystalline semiconductor material over a sidewall of the opening, wherein the semiconductor channel extends through the stack; diffusing a metallic material through at least a portion of the semiconductor channel, wherein the metallic material induces crystallization of the amorphous or polycrystalline semiconductor material in the semiconductor channel into a crystalline semiconductor material portion; and forming backside recesses by removing the second material layers selective to the first material layers, wherein a portion of the outer sidewall of the semiconductor channel comprising the amorphous or polycrystalline semiconductor material is physically exposed in each backside recess.