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:
Jan. 18, 1994
Filed:
Sep. 17, 1992
Deepak K Pai, Burnsville, MN (US);
Ceridian Corporation, Bloomington, MN (US);
Abstract
A circuit module includes a multilayer circuit board having a plurality of alternate layers defining circuit paths and insulation with conductive vias between selected circuit paths of different layers. A hermetic seal is sealed to the top layer of the multilayer circuit board, and the circuit paths and/or vias are selectively connected to external pads by vias extending through the multilayer circuit board, one via terminating at a pad internal to the sealed region and another via terminating at the external pad. In one form, the vias providing the external connection extend into a substrate supporting the board, and circuit paths in the substrate electrically connect the vias together. In a second form, the vias providing the external connection are electrically connected together by selected circuit paths in the circuit board. A conductive anchor extends through the circuit board to the substrate to provide an anchor for the seal. Where the vias providing external connection are connected by selected circuit paths in the circuit board, the conductive anchor comprises posts having openings through which the selected circuit paths pass.