Abstract
Disclosed is a method for removing poly-para-xylylene, its derivatives, and copolymers (collectively called "parylene") from bodies, including relatively large bodies such as printed circuit (PC) boards, that is capable of yielding relatively high removal rates. A body such as a PC board coated with parylene is placed into a reaction chamber downstream from a microwave plasma such that plasma discharge products generated by the microwave plasma react with the parylene, etching the parylene without exposing the body to bombardment by energetic ions and/or electrons. The plasma is generated from a gas mixture containing oxygen, a second gas, and optional additives such as N2 O, He,or Ar. The second gas is selected from the group consisting of fluorocarbons, fluorosulfides, and chlorofluorocarbons. A currently preferred second gas is CFR4. The inventive method is also applicable for fabricating articles such as integrated circuits and semiconductor devices that comprise a parylene layer.
Recommended Citation
Bachman, B., Hofstatter, E. A., Ritter, J. M., & Rubin, J. J. (1990). Method for fabricating or modifying an article comprising the removal of a polymer coating. U.S. Patents
Department(s)
Economics
Patent Application Number
US07/428,137
Patent Number
US4946549A
Document Type
Patent
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 1990 Nokia Bell Labs, AT&T Corp, All rights reserved.
Publication Date
07 Aug 1990
