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:
May. 26, 1992
Filed:
Mar. 23, 1990
Maurice S Karpman, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A semiconductor device having a package sealed by a UV-curable, thixotropic, acrylated epoxy and a method for sealing the package are disclosed. The package is sealed at room temperature by polymer cross-linking of the epoxy which is initiated by exposure of at least a portion of the expoxy to ultraviolet (UV) frequency radiation. In accordance with one embodiment of the invention, a base is provided having an electronic component attached to the base at a predetermined location. A lid having a layer of UV-curable epoxy screen-printed to a bonding portion is positioned onto the base enclosing the electronic component within a cavity formed by the union of the base and the lid. The lid is sealed to the base at room temperature by irradiating an exposed edge portion of the epoxy layer with UV frequency radiation. The formation of the seal at room temperature avoids thermal damage to temperature sensitive materials in both the package and the enclosed electronic component.