Patent ID: 6422928
Filing Date: 2002-07-23
Classification: B24B,H01L

Abstract:
An abrasive machine, comprising:an abrasive plate having an upper face, which is an abrasive face capable of abrading a wafer; a holding section including: a head member being located above the abrasive face with a prescribed separation; a holding plate being provided between said head member and the abrasive face, said holding plate having a lower face, which is a holding face capable of holding the wafer; and a bellows being fixed between said holding plate and said head member, said bellows allowing said holding plate to move close to and away from and incline with respect to a lower face of said head member, said bellows forming a pressure chamber; means for pressing the wafer onto the abrasive face, with said holding plate, by pressurizing the pressure chamber; and a driving mechanism for relatively moving said abrasive plate with respect to the wafer held by said holding section so as to abrade the wafer by the abrasive face, wherein said bellows is made by cutting a block of plastic without forming seams and said plastic is ultra-high molecular weight polyethylene.