Coherent light generators – Particular active media – Semiconductor
Patent
1990-11-15
1993-09-14
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 45, 257 99, H01S 319
Patent
active
RE0343781
ABSTRACT:
A light emitting device is disclosed which includes a semiconductor block, an active layer disposed in such a fashion as to penetrate through the mutually facing end surfaces of the semiconductor block, and an electrode disposed on the main plane of the semiconductor block, wherein the electrode consists of a first electrode portion disposed along the active layer, and a second electrode portion continuing integrally the first electrode portion and having the periphery thereof out of contact from the periphery of the second main plane of the semiconductor block. A current is caused to uniformly flow through the entire active layer, and a light emitting operation is carried out stably. Since the electrode is not disposed on the periphery of the semiconductor block, the occurrence of junction short-curcuit, which might otherwise occur when a wafer is cut off to produce laser chips or when the corners of the chip break off, can be reduced.
REFERENCES:
patent: 4352187 (1982-09-01), Amann
patent: 4376307 (1983-03-01), Rozzi et al.
patent: 4692927 (1987-09-01), Sawai et al.
patent: 4731790 (1988-03-01), Sawai
Hayashi Shoji
Ichiki Masahiro
Kobayashi Masamichi
Naka Hiroshi
Sawai Masaaki
Davie James W.
Hitachi , Ltd.
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