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:
Mar. 25, 2003
Filed:
Apr. 26, 2000
David W. Kinnard, Olney, MD (US);
Other;
Abstract
A baffle plate assembly ( ) is provided for distributing gas flow into an adjacent process chamber cavity ( ) containing a semiconductor wafer to be processed. The baffle plate assembly ( ) comprises a generally planar upper baffle plate ( ) fixedly positioned above a generally planar lower baffle plate ( ) and covered by a process chamber top wall ( ). The top wall ( ) and the lower baffle plate form a plenum therebetween, the plenum operating at a higher pressure than the process chamber cavity ( ) during operation of the device, At least the lower baffle plate ( ) has a pattern of apertures ( ) formed therein for permitting gas to pass therethrough and into the wafer process chamber. The upper baffle plate ( ) and the lower baffle plate ( ) are positioned generally parallel to each other, and the upper baffle plate ( ) is smaller than the lower baffle plate ( ). Preferably, the lower baffle plate ( ) is comprised of low-alloy anodized aluminum, and the upper baffle plate ( ) is comprised of sapphire-coated quartz.