Patent ID: 8652764

Claim:
A method for manufacturing a piezoelectric membrane type device which includes a substrate, and a piezoelectric device having a piezoelectric membrane and provided on a first principal surface of said substrate, said method comprising, (a) a substrate preparing step of preparing said substrate; (b) a piezoelectric material layer forming step of forming, above said first principal surface of said substrate, a piezoelectric material layer which is a layer including a piezoelectric material to be changed into said piezoelectric membrane by being fired; (c) a first mask forming step of forming a first mask above said piezoelectric material layer; (d) a piezoelectric material layer processing step of injecting a blast media including at least one of abrasive grains and an organic solvent to said first principal surface of said substrate toward said piezoelectric material layer, which has not been fired and on which said first mask has been formed, so as to eliminate said piezoelectric material layer existing in a portion on which said first mask does not exist; (e) a first mask eliminating step of eliminating said first mask; and (f) a firing step of firing said piezoelectric material layer.