Patent ID: 7597774
Filing Date: 2009-10-06
Classification: B32B,G02F,H01L,Y10T

Abstract:
1. A method of bonding two substrates held by first and second holding plates arranged to face each other in a process chamber, the method comprising: vacuum holding at least one of the two substrates by at least one of the first or second holding plates in the process chamber; feeding a gas in the process chamber to elevate pressure in the process chamber to a predetermined elevated pressure higher than the atmospheric pressure; electrostatically holding said at least one of the two substrates by said at least one of the first or second holding plates after the pressure in the process chamber is elevated to the predetermined elevated pressure, pressing the two substrates to bond to each other after said electrostatically holding said at least one of the two substrates; and stopping the vacuum holding before pressing the two substrates.