Fishing – trapping – and vermin destroying
Patent
1991-05-30
1993-04-27
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
437130, H01L 2120, H01L 21208
Patent
active
052061850
ABSTRACT:
A semiconductor laser device is disclosed which comprises a semiconductor substrate having a ridge portion, the width of the ridge portion being smaller in the vicinity of the facets than in the inside of the device; a current blocking layer formed on the substrate including the ridge portion; at least one striped groove formed on the center of the ridge portion through the current blocking layer; and a multi-layered structure disposed on the current blocking layer, the multi-layered structure successively having a first current blocking layer, an active layer for laser oscillation, and a second current blocking layer; wherein at least two side grooves are symmetrically formed on both sides of the center region of the ridge portion with the same width as that of the regions thereof near the facets. Also, disclosed is a method for producing the semiconductor laser device.
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Hosoba Hiroyuki
Matsui Sadayoshi
Matsumoto Mitsuhiro
Morimoto Taiji
Chaudhuri Olik
Sharp Kabushiki Kaisha
Trinh Loc Q.
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