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:
Jul. 24, 2007
Filed:
May. 15, 2003
Michael W. Stowell, Jr., Loveland, CO (US);
Michael W. Stowell, Jr., Loveland, CO (US);
Applied Films Corporation, Longmont, CO (US);
Abstract
A method and apparatus for sputter deposition in which both a pulsed DC power supply and an RF power supply apply power to the target in the sputter deposition equipment. The pulsed DC power supply provides an on cycle where power is applied to the target, and an off cycle, in which a reverse polarity is applied to the target. The application of the reverse polarity has the effect of removing any charge that may have built up on the surface of the target. This reduces the likelihood of arcing occurring on the surface of the target, which can degrade the quality of the film being deposited on the substrate. By applying RF power simultaneously with the pulsed DC power to the target, the ionization efficiency on the target surface is increased. This results in a greater amount of material being removed from the target surface more quickly.