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. 16, 1996
Filed:
Oct. 27, 1995
Roger A Olsen, Amery, WI (US);
John Wary, Noblesville, IN (US);
William F Beach, Bridgewater, NJ (US);
Specialty Coating Systems, Inc., Indianapolis, IN (US);
Abstract
Chemical vapor deposition apparatus is provided for the quick and efficient deposition of Parylene AF4 onto silicon wafers in the production of semiconductor chips. The apparatus includes a post-pyrolysis chamber maintained at a predetermined temperature for capturing unpyrolyzed dimer before entry into the deposition chamber, and a filter structure positioned at the deposition chamber inlet to filter out microscopic particles and impurities prior to deposition onto the wafer surface. The post-pyrolysis chamber includes baffles for capturing the unpyrolyzed dimer, and the filter material preferably comprises PTFE. The filter element is heated to prevent deposition onto the filter.