Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1996-04-24
1997-02-04
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
257433, H01L 310203
Patent
active
056001312
ABSTRACT:
A photodetecting device for use in an optical head comprises a photodetector (20) having a body portion (21) at one surface of which a light receiving surface (21a) is provided and a plurality of lead portions (22) each extending outwardly from the other surface of the body portion (21), and, a metallic substrate (10) having a through hole (12) and a plurality of electrically conductive land portions (13) formed on a first surface of the metallic plate (10) via an insulating layer (11). The lead portions (22) of the photodetector (20) are bent toward the substrate (10). An end portion of the lead portion (22) is connected to the land portion (13). The photodetector (20) is disposed so that the light receiving surface (21a) faces the through hole (12) and a light from the optical head (H) on which a second surface of the substrate (10) is joined arrives at the light receiving surface (21a) through the through hole (12).
REFERENCES:
patent: 3963920 (1976-06-01), Palmer
patent: 4623220 (1986-11-01), Grabbe et al.
patent: 5317195 (1994-05-01), Ishikawa et al.
patent: 5436997 (1995-07-01), Makiuchi et al.
NEC Corporation
Pyo Kevin
Westin Edward P.
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