Patent ID: 7531232

Claim:
A component for a vacuum apparatus comprising a ceramic and/or metallic thermal spray film formed on a base material, wherein projection-shaped particles of a width of 10-300 μm, a height of 4-600 μm and an average height/width ratio of 0.4 or higher are present within a range of 20-20,000 particle/mm 2 on the surface of said thermal spray film, and the projection-shaped particles have a mountain-like shape and have rounded corners, in the case of the ceramic thermal spray film, the projection-shaped particle is formed by an agglomerate of particles of a diameter of 0.1-5 μm, and in the case of the metallic thermal spray film, the projection-shaped particle is formed by an agglomerate of particles of a diameter of 0.1-10 μm.