Patent ID: 6717182
Filing Date: 2004-04-06
Classification: B41J,H01L

Abstract:
An end face light-emitting thyristor for emitting light from an end face thereof, comprising:a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, a third semiconductor layer of the first conductivity type, and a fourth semiconductor layer of the second conductivity type stacked in that order on a substrate of the first conductivity type, wherein the end face includes an edge of at least two of the stacked semiconductor layers, a first electrode provided on the fourth semiconductor layer in the vicinity of the edge for injecting current into the stacked semiconductor layers, wherein the current injected from the first electrode is concentrated near the end face, whereby light is primarily emitted from the end face, and a second electrode provided on the third semiconductor layer, wherein the first, second and third semiconductor layers have a necked portion between a region including the first electrode and a region including the second electrode.