| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to suppress the spread of impurities from an over flow layer to an active layer and suppress the decrease in emission efficiency. SOLUTION: The invention comprises a first conduction type first cladding layer 2 formed on a crystal substrate 1, an active layer 4 formed on the first cladding layer, a spread prevention layer 51 which is formed on the active layer and which prevents impurities from being spread to the active layer, an over flow prevention layer 5 of a second conduction type different from the first conduction type, which is formed on the spread prevention layer and which prevents the over flow of carrier poured into the activity layer, and a second conduction type second cladding layer 7 formed on the over flow prevention layer. COPYRIGHT: (C)2006,JPO&NCIPI
|
