Sharp Kabushiki Kaisha Corporation

Yoshiki Yasuda

Hideya Takakura

Motonari Aki

In a lead frame which has second tie bars in the vicinity of plastic packages first notches are formed along first edges of the second tie bars (in areas defined on both sides of the inner leads and to come into contact with a punch during the tie bar cutting step). The first notches prevent troubles associated with close arrangement of the second tie bars and the plastic packages. In addition, second notches are provided along second edges of the second tie bars. These second notches are designed to receive the tips of outer leads which extend from neighboring plastic packages of the lead frames.

Lead frame for a plastic encapsulated semiconductor device

A semiconductor light receiving device is provided, which comprises a semiconductor substrate, a collector region, a base region, and an emitter region, an insulating film covering the surface of the collector region, the base region, and the emitter region, a first metal line on the insulating film at a position corresponding to the base region and being electrically connected to the emitter region, and a second metal line on the insulating film at a position corresponding to a junction portion of the base region and the collector region and being electrically connected to the emitter region. The first metal line has a sloped surface such that incident light falling on the first metal line is reflected and directed toward the surface of the base region.

Semiconductor light receiving device and electronic apparatus incorporating the same

An object of the present invention is to provide a photocoupling device which can supply sufficient light to a light receiving element by increasing brightness on the input section side at a low input current, and provide a method of manufacturing, with which such a photocoupling device can be assembled without adding an extra process. A photocoupling device of the invention includes an input section having two light emitting elements and lead terminals for supplying a drive current to the light emitting elements, and an output section having a light receiving element opposed to light emitting faces of the light emitting elements and lead terminals for supplying a drive current to the light receiving element, wherein the two light emitting elements are connected in series.

Growing community of inventors

Nara, Japan

Yoshiki Yasuda