Patent ID: 8293557

Claim:
A method for manufacturing a MEMS device, comprising: preparing a substrate provided with a first substrate and a second substrate bonded to the first substrate, the first substrate having a cavity formed in a manner to extend to a first surface serving as an inner surface of the second substrate, the second substrate having a thermally-oxidized film which has been subjected to patterning formed on the first surface in a position corresponding to the cavity; forming a movable portion on the second substrate by forming a slit in a region facing the cavity, the movable portion being provided with the thermally-oxidized film on the first surface and being deformable to a space formed by the cavity; forming a first electrode layer on a second surface opposite to the first surface for the movable portion; forming a sacrifice layer on the first electrode layer and the second substrate; forming a second electrode layer on the sacrifice layer; and removing the sacrifice layer and the thermally-oxidized film after the second electrode layer is formed.