Further, there has also been known that a transparent electroconductive layer having an uneven surface is formed between the reflection layer and the semiconductor layer to obtain a light confining effect that {HEAD ~ an optical distance} of reflected light is prolonged to obtain {TAIL ~ an effect} of suppressing an excessive current flowing at the time of an occurrence of a shunt phenomenon 
Further , there has also been known that a transparent electroconductive layer having an uneven surface is formed between the reflection layer and the semiconductor layer to obtain a light confining effect that { HEAD ~ an optical distance } of reflected light is prolonged to obtain { TAIL ~ an effect } of suppressing an excessive current flowing at the time of an occurrence of a shunt phenomenon
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