Invention Grant
- Patent Title: Polyceramic e-chuck
- Patent Title (中): 聚碳酸酯卡盘
-
Application No.: US11823978Application Date: 2007-06-29
-
Publication No.: US07667944B2Publication Date: 2010-02-23
- Inventor: Mahmood Naim
- Applicant: Mahmood Naim
- Applicant Address: US CT Danbury
- Assignee: Praxair Technology, Inc.
- Current Assignee: Praxair Technology, Inc.
- Current Assignee Address: US CT Danbury
- Agent Iurie A. Schwartz
- Main IPC: H01T23/00
- IPC: H01T23/00

Abstract:
The present invention discloses an electrostatic chuck for clamping work substrates, said chuck comprising three layers, where the dielectric constant of included non-conductive layers is selected to provide overall lower capacitance to the chuck. In the chuck assembly of the present invention, the top dielectric layer that is in contact with a substrate, such as, a wafer, has a dielectric constant that is preferably greater than about 5, with a resistivity that is preferably greater than about 1E6 ohm.m, whereas the bottom dielectric layer has a dielectric constant that is preferably less than about 5 and a resistivity that is preferably greater than about 1E10 ohm.m. The intermediate layer preferably has a conductive layer where the resistivity is less than about 1 ohm.m.
Public/Granted literature
- US20090002913A1 Polyceramic e-chuck Public/Granted day:2009-01-01
Information query