Patent ID: 7604353

Claim:
A deformable mirror device comprising: a substrate; a plurality of electrodes provided on the substrate; a spacer disposed on the substrate; a support member disposed above the spacer and having an opening passing through from a first face of the support member facing to the substrate to a second face of the support member facing opposite from the first face; a first insulation film provided on the first face of the support member; a second insulation film provided on the second face of the support member; and a deformable electrode film disposed so as to be opposed to the electrodes at a spacing, formed so as to cover the opening, and supported by the support member with sandwiching the first insulation film, wherein the electrode film comprises a reflection portion on a face opposite from the electrodes, and the support member is disposed above the substrate with sandwiching the electrode film, the first insulation film and the spacer, and wherein the support member comprises silicon, the first and second insulation films comprise silicon oxide, and the electrode film comprises a silicon film with impurities introduced therein.