JOHN R WYLIE
Engineering in North Andover, MA
License number
Massachusetts 26307
Expiration Date
Jun 30, 1990
Type
Industrial Engineer
Address
Address
North Andover, MA 01845
Professional information
Removal Of Rtv Silicon Rubber Encapsulants
US Patent:
4089704, May 16, 1978
Filed:
Dec 27, 1976
Appl. No.:
5/754098
Inventors:
John Herbert Heiss - Bethlehem PA
John Robert Wylie - North Andover MA
John Robert Wylie - North Andover MA
Assignee:
Bell Telephone Laboratories, Incorporated - Murray Hill NJ
Western Electric Company Inc. - New York NY
Western Electric Company Inc. - New York NY
International Classification:
H01L 2330
US Classification:
134 29
Abstract:
Disclosed is a method of removing silicone rubber encapsulating material from micro-electronic circuits. The encapsulant is broken down molecularly and removed by a solution of tetramethyl-ammonium hydroxide which is diluted with an alcohol such as 2-propanol. It was found that this stripping solution causes minimal swelling of the encapsulant and leaves no significant residue which cannot be removed by standard rinsing.