| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor element that reduces polarization generated by the lamination of two semiconductor layers having different composition each other, has a mesa section for enabling a carrier to move smoothly, and has low electric resistance. SOLUTION: A band gap change layer of which the composition changes is arranged between the two semiconductor layers that are laminated at the mesa section and have different composition each other in a lamination direction. COPYRIGHT: (C)2007,JPO&INPIT
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