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:
Jun. 15, 1989
Giuseppe Marchisi, Milan, IT;
Abstract
A hollow-type package of optically and non-optically active semiconductor devices is entirely made of moldable plastic material by utilizing a preformed box-like shell of a rigid plastic material for enclosing the semiconductor dye and the electrical connection wires before molding the shell in an epoxy resin. The protective shell is composed of two corresponding half parts and, in the case of optically active devices, the top half of the shell is provided with a window closed by a transparent pane which is sealed during the encapsulation. Preferably, the two halves of the protection shell have two spaced lateral walls forming two spaced sealing perimeters and a perimetral chamber which is formed therebetween and surrounds a central cavity of the shell for accommodating any encapsulating resin which may eventually enter through the outer sealing perimeter during molding. The central cavity of the shell may be filled with a nonrigid silicon resin before molding for further increasing the protection. The entirely plastic hollow package may be formed through a normal plastic molding process.