Patent ID: 7301259

Claim:
A vibration type driving apparatus comprising: an elastic member given vibrations by an electric-mechanical energy conversion element; and a contact member contacting the elastic member and driven by vibrations given to the elastic member, wherein the elastic member is formed by aluminum oxide ceramics containing 5 wt % to 40 wt % of zirconium oxide, the aluminum oxide ceramics has an arithmetic average height Ra of more than 0.05 μm and 0.2 μm or less for the surface of the member, and maximum values of elevation differences are in the range of 0.05 μm to 0.2 μm between zirconium oxide particles and aluminum oxide particles on the surface, wherein the contact member is formed by stainless steel, and wherein vibration is generated by the elastic member to drive the contact member, whereby the contact member wears and a wearing powder of the contact member is accumulated in a recess of a surface of the elastic member.