Patent ID: 7883930

Claim:
A manufacturing method of a phase change memory comprising: forming a first electrode; forming an electrically conductive layer on the first electrode; forming a block copolymer layer having an ordered structure where first polymer phases and second polymer phases are approximately regularly arranged on the electrically conductive layer; selectively removing the first polymer phases to form a plurality of recesses on a surface of the block polymer layer; forming a plurality of electrically conductive bodies corresponding to the ordered structure of the block copolymer by utilizing the recesses as masks to perform etching process on the electrically conductive layer; forming a high resistance film with a resistance higher than that of the electrically conductive bodies among the plurality of electrically conductive bodies; forming a phase change material layer which can change its phase between a first phase state having a first specific resistance and a second phase state having a second specific resistance different from the first specific resistance on the plurality of electrically conductive bodies and the high resistance film; and forming a second electrode on the phase change material layer.