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. 23, 1991
Filed:
Aug. 01, 1988
Lawrence E Crowe, Lindenwood, IL (US);
Thomas A Sutrina, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A hermetically sealed circuit assembly having circuit elements to be compression bonded and a stack containing at least one hermetically sealed circuit assembly having circuit elements which are compression bonded is disclosed. Uniform thickness of individual hermetically sealed circuit assemblies measured across columns is insured by positioning deformable spacers in the columns containing the circuit elements to be compression bonded, and deforming the deformable spacers so that a surface of each of the deformed spacers lies within a single plane. Thereafter a compressive force is applied to a stack or one or more circuits through the columns which contain the circuit elements to be compression bonded. The individual hermetically sealed circuit assemblies have circular corrugations in a flat surface and circular corrugations in a lid which are disposed within the columns containing the individual circuit elements to be compression bonded to permit freedom of motion in all directions of the individual circuit elements to be compression bonded without applying torsional or other loads to any other circuit elements to be compression bonded. Furthermore, all circuit buses contain one or more corrugations between each circuit element to be compression bonded and external connections to couple the circuit elements to be compression bonded to the exterior of the hermetically sealed chamber and in circuit buses between any adjacent circuit elements to be compression bonded.