- Patent Title: Heated stage with variable thermal emissivity method and apparatus
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Application No.: US14792509Application Date: 2015-07-06
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Publication No.: US10256121B2Publication Date: 2019-04-09
- Inventor: Mirko Vukovic , Ronald Nasman
- Applicant: Tokyo Electron Limited
- Applicant Address: JP Tokyo
- Assignee: Tokyo Electron Limited
- Current Assignee: Tokyo Electron Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: H01L21/67
- IPC: H01L21/67 ; H01L21/285

Abstract:
Embodiments include a method for controlled cooling of a heated stage. The method includes setting a stage coupling to a maximum value and heating the stage to a process temperature. The method includes providing a wafer on the heated stage in a process chamber. The method includes performing a process on the wafer and reducing the heating stage coupling to a predetermined minimum value and reducing the heated stage temperature. The method includes removing the wafer from the heated stage and the process chamber. The heated stage is covered with a plurality of pixels, each pixel of the plurality of pixels include a level of emissivity and are equipped with an emissivity control device configured to independently adjust the level of emissivity of the pixel. The heated stage coupling is configured to achieve a predetermined radiative coupling and control the wafer cooling rate and target temperature.
Public/Granted literature
- US20170011975A1 HEATED STAGE WITH VARIABLE THERMAL EMISSIVITY METHOD AND APPARATUS Public/Granted day:2017-01-12
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