Optical detector, optical head device, optical information...

Details Optical detector, optical head device, optical information... Optical detector, optical head device, optical information...

2006-12-26

2006-12-26

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044140

Reexamination Certificate

active

07154838

ABSTRACT:
A photodetector, includes: a semiconductor chip that converts received light to an electric signal; and a resin body that encapsulates the semiconductor chip. The photodetector further includes a protective unit, and at least a light transmission area, through which the light passes, in a surface of the resin body on an incident side of the light is covered by the protective unit. Covering the light transmission area with the protective unit that is less in reactivity with light than the resin body can suppress deformation of the resin body due to light, thus suppressing deterioration of the optical characteristics of the photodetector.

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patent: 6144107 (2000-11-01), Narita
patent: 6594221 (2003-07-01), Ogasawara
patent: 49-114362 (1974-10-01), None
patent: 63-830 (1988-01-01), None
patent: 4-152556 (1992-05-01), None
patent: 4-196588 (1992-07-01), None

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