Patent ID: 7838379

Claim:
A method of manufacturing a non-volatile memory device including a memory device for storing information by a change of a resistance value of a memory material layer, the memory device having a structure of combination of the memory material layer and a diode, the method comprising: providing a substrate; forming a lower electrode above the substrate; forming a first amorphous silicon layer above the lower electrode; forming a second amorphous silicon layer above the first amorphous silicon layer; irradiating a surface of the second amorphous silicon layer with a laser so as to transform at least the second amorphous silicon layer into a polysilicon layer; and patterning the polysilicon layer, wherein the laser irradiates in the step of laser irradiation so as to form a first region of a higher temperature and a second region of a relatively lower temperature temporarily in a horizontal direction in the second amorphous silicon layer, and wherein, in the step of patterning the polysilicon layer, a portion of the polysilicon layer associated with the first region is removed.