Patent ID: 9475167
Filing Date: 2016-10-25
CPC Classification: B24B

Claim Text:
1. An apparatus for polishing a substrate by bringing the substrate into sliding contact with a polishing pad, said apparatus comprising: a polishing table configured to be rotatable about its axis and support the polishing pad; a top ring configured to press the substrate against the polishing pad on said polishing table; and a pad temperature regulator configured to regulate a surface temperature of the polishing pad and provided above said polishing table, wherein said pad temperature regulator includes a pad contact element brought into contact with a surface of the polishing pad, and a liquid supply system configured to supply a temperature-controlled liquid to said pad contact element, wherein said pad contact element has a space therein and a partition that divide the space into a first liquid passage and a second liquid passage, wherein said first liquid passage and said second liquid passage are connected in series at a location above a central portion of said polishing table, wherein said first liquid passage is in communication with a liquid inlet coupled to said liquid supply system, wherein said second liquid passage is in communication with a liquid outlet coupled to said liquid supply system, wherein said partition extends in a radial direction of said polishing table, and wherein plural baffles, extending substantially perpendicular to said partition and in approximately a circumferential direction of said polishing table, are provided in each of said first liquid passage and said second liquid passage, said plural baffles being staggered alternately to form each of said first liquid passage and said second liquid passage into a zigzag passage that extends alternately in a rotating direction of the polishing table and in a direction against the rotating direction, wherein said plural baffles comprise first baffles and second baffles, said first baffles being connected to said partition and being substantially perpendicular to said partition, said second baffles being connected to a side of said pad contact element, and wherein said first baffles and said second baffles are staggered alternately along a radial direction of said polishing table.