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:
Apr. 19, 1988
Filed:
Jun. 30, 1987
Lance R Kaufman, Mequon, WI (US);
Other;
Abstract
A circuit package (2) includes a housing (10) having a chimney (20) extending downwardly through an upper epoxy coating material (16) into a lower thermally expansible soft silicon coating material (14) which covers heat generating electrical components (8) on a ceramic substrate (4). The soft silicon coating material is pliable and subject to thermal expansion. The epoxy coating material is substantially rigid and not subject to thermal expansion. The chimney provides a thermal expansion relief passage for the soft silicon coating material upon heating thereof by the electrical components, to prevent the ceramic substrate from being pushed away from the housing by the soft silicon coating material during thermal expansion thereof, and reduce undesirable forces against internal components.