Patent ID: 9583376
Date: 2017-02-28
CPC Classifications: B24B,B25B,H01L

Claim:
1. A suction-holding apparatus comprising: a suction plate made of an air-permeable material and including a front face and a rear face that are spaced apart from each other in a thickness direction of the suction plate; a holding member formed with a through-hole in which the suction plate is placed; and a base to which the holding member is attached, the base being adjacent to the rear face of the suction plate; wherein the suction plate is formed with at least one jutting-out portion in a manner such that an outer edge of the rear face is disposed outwardly from an outer edge of the front face as viewed in the thickness direction at the jutting-out portion, the through-hole includes a first edge and a second edge that are spaced apart from each other in the thickness direction, the first edge being adjacent to the base, the holding member is formed with at least one eaved portion in a manner such that the second edge of the through-hole is disposed inwardly from the outer edge of the rear face as viewed in the thickness direction at the jutting-out portion, the suction plate comprises a plurality of annular elements that are concentrically disposed, each annular element having an outer side surface that tapers in the thickness direction, the holding member has an inner surface tapering in the thickness direction, and the plurality of annular elements include an outermost annular element with which an entirety of the inner surface of the holding member is in direct contact, and the outermost annular element has a rear face held in direct contact with the base.