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. 12, 1998
Filed:
Apr. 12, 1996
Roger Prost, St. Egreve, FR;
Thomson-CSF Semiconducteurs Specifiques, Paris, FR;
Abstract
The invention relates to components such as pyroelectric sensors which are particularly sensitive to piezoelectric effects and which, consequently, are disturbed by the mechanical deformations or the vibrations which the component may experience. In order to limit these disturbances, it is proposed to insert, between the chip (10) carrying the pyroelectric layer and the bottom of the package (30), a flexible sheet (42) of silicone which absorbs the deformations of the package without transmitting them to the chip. Ultrasonic bonding of the connecting wires (34) is still possible despite the presence of the flexible sheet. The chip is preferably fixed to a metallized ceramic plate (40) and abutments (44) are preferably provided at the bottom of the package in order to limit the compression of the flexible sheet (42) during the bonding operation.