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. 01, 2001
Filed:
May. 25, 1999
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
Seal coating mask for semiconductor element and method of use thereof with a seal coating mask with an opening located at a position where a semiconductor element is mounted on a wiring board. The coating mask has an annular protrusion formed along the whole periphery of the opening. A clearance of about 0.01 to 0.5 mm is formed between at least a part of the whole periphery of the annular protrusion and the front surface of the wiring board. The coating mask also includes a space portion formed on the back of the seal coating mask for cutting off cooling material outside of the annular protrusion. The coating mask is used to forcibly coat a material for sealing the semiconductor element in the front surface of the wiring board.