Semiconductor light-emitting device having annular shape...

Details Semiconductor light-emitting device having annular shape... Semiconductor light-emitting device having annular shape...

2007-07-24

2007-07-24

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S498000, C257S079000

Reexamination Certificate

active

10969015

ABSTRACT:
A semiconductor light-emitting device includes: a semiconductor substrate; a light-emitting layer formed on the semiconductor substrate; a current-blocking layer formed on a part of the light-emitting layer for restricting light-emission; a current-spreading layer formed on the current-blocking layer and the other part of the light-emitting layer; a front electrode formed on the current-spreading layer; and a rear electrode formed on a rear side of the semiconductor substrate. The current-blocking layer is composed of a central region and an outer region which surrounds the central region via a part of the current-spreading layer, so that a light-emitting region that appears on a front surface of the device has an annular shape. The front electrode and the central region of the current-blocking layer are opposed to each other.

REFERENCES:
patent: 6121635 (2000-09-01), Watanabe et al.
patent: 2002/0020842 (2002-02-01), Sasaki et al.
patent: 2003/0001162 (2003-01-01), Udagawa
patent: HEI 4-229665 (1992-08-01), None
patent: HEI 8-167738 (1996-06-01), None
patent: HEI 11-26810 (1999-01-01), None

Affiliated with

Also associated with

Rating

Semiconductor light-emitting device having annular shape... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor light-emitting device having annular shape..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor light-emitting device having annular shape... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3803226