| 摘要 |
The present invention provides an electronic device (100) having superior qualities. The electronic device includes an active region (130) located over a substrate (110) and an undoped layer (140) located over the active region, the undoped layer having a barrier region including aluminum (150) located thereover. The electronic device further includes a doped upper cladding layer (170) located over the barrier region. In an exemplary embodiment of the invention, the barrier region is a barrier layer or a number of barrier layers located between a plurality of the undoped layers. |
