Rotary joint and polishing apparatus
US9764446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2015 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Dec 30, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B37/107
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention suppresses generation of noises attributable to rotation of a rotary joint. A rotary joint includes a rotating body that rotates on a rotating axis A, a housing disposed so as to surround the rotating body, and at least one bearing disposed between the rotating body and the housing and adapted to support rotation of the rotating body. The rotary joint supplies fluids through fluid connection ports formed in the housing and fluid passages formed inside the rotating body to a polishing table having attached thereto a polishing pad for polishing a substrate or a holding portion that is adapted to hold the substrate while pressing the substrate against the polishing pad. At least one elastic member is interposed at least either between the rotating body and the at least one bearing or between the housing and the at least one bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.