Patent ID: 9337075
Filing Date: 2016-05-10
CPC Classification: B24B,H01L

Claim Text:
1. A chemical mechanical polishing fixture having lateral perforation structures, comprising: a holder, comprising: a retaining ring having a second joint surface and a plurality of second holes, wherein the second holes are annularly arranged on the second joint surface, and each second hole corresponds to one first hole; and a plurality of bushing screws, each having a screw head, a hollow structure and a screw rod, wherein an inner wall surface of the screw rod has a second inner thread structure, an outer wall surface of the screw rod has an outer thread structure, each bushing screw penetrates the second holes of the retaining ring and the first holes of the holder, and then is locked to the first inner thread structure via the outer thread structure to fix the holder and the retaining ring, so that the first joint surface and the second joint surface are joined closely, and the second inner thread structure is used for locking the chemical mechanical polishing fixture having lateral perforation structures to a semiconductor machine individually with a setscrew.