Patent ID: 7372691
Filing Date: 2008-05-13
Classification: G02F,H01L

Abstract:
1. A method for reliably attaching two substrates together, comprising: providing a substrate attaching device comprising a vacuum chamber, a first electrostatic chuck at least partly set in the vacuum chamber, a working table stationable below the first electrostatic chuck in the vacuum chamber, and a sub-vacuum chamber connected with the vacuum chamber; holding a first one of the substrates to the first electrostatic chuck, and disposing a second one of the substrates on the working table; moving the first electrostatic chuck and the working table closer together until the first substrate and the second substrate are attached together; and supplying a gas to the first electrostatic chuck in order to separate the first substrate from the first electrostatic chuck, while simultaneously maintaining a degree of vacuum in the sub-vacuum chamber higher than a degree of vacuum in the vacuum chamber.