The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1996
Filed:
Dec. 27, 1994
Supika Mashiro, Tokorozawa, JP;
Tomoaki Osada, Tokyo, JP;
Anelva Corporation, Fuchu, JP;
Abstract
A method for rapidly, reliably, and safely removing a substrate from an electrostatic clamping electrode and a mechanism for effecting the method. The method comprises forming a gap between an electrode and a substrate which had been made to hold onto the electrode by electrostatic clamping to increase the electrostatic potential between the substrate and the electrode, generating a DC-glow-discharge in the vicinity of the substrate according to Paschen's law, and removing the substrate from the electrode after eliminating the static charge from the substrate using gas molecules charged by the DC-glow-discharge. A mechanism for effecting the method comprises a means for introducing a gas, a protruding means, a means for controlling the pressure, a sequencer for sequentially activating them, and a lifting mechanism for adjusting the height of the protruding means to the gap distance necessary for generating a DC-glow-discharge between the substrate and the electrode.