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:
Jun. 23, 1998
Filed:
Jan. 16, 1996
Naoki Sata, Kitakatsuragi-gun, JP;
Kazuo Kusuda, Shiki-gun, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A photocoupler device includes a light-emitting chip, a light-receiving chip, a light-emitting side lead frame for individually holding the light emitting chip and a light-receiving side lead frame for individually holding the light-receiving chip. The light-emitting and light-receiving chips are opposed to each other so as to be optically coupled and covered with a light-transmissive resin as a first molding layer, in the whole part except in the outside connecting terminal portions of the two lead frames. The first molding layer is further covered with an opaque resin as a second molding layer. In such a photocoupler device, the light-transmissive resin is made to contain fillers in an amount of 80% by weight or more and directly cover the light-emitting chip, without needing silicone-resin coating for protecting the light-emitting chip.