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:
Aug. 27, 1991
Filed:
Oct. 09, 1990
Edward Carnall, Jr, Rochester, NY (US);
Edward J Ozimek, Penfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
The present invention relates to a preform of a solid body of an amalgam. The amalgam is a mixture of a metal which is liquid at room temperature and at least one powdered metal. The preform is formed by mixing together the ingredients of the amalgam and pouring the amalgam into a caity in a mold. The mold and amalgam is then cooled to a temperature below the melting temperature of the liquid metal in the amalgam. The preform is then removed from the mold. The preform can be stored at the low temperature until it is desired to use it to bond two bodies together. The preform can be used to bond two bodies together, such as the cover plate and housing of a microelectronic device package, by placing the preform between the two bodies. The bodies are mechanically scrubbed and clamped together with the preform therebetween and heated to a temperature at which the preform melts and the amalgam reacts to bond to the two bodies. Since the liquid metal in the amalgam has a melting temperature slightly above normal room temperature, the bonding can be achieved at relatively low temperatures.