Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With particular semiconductor material
Reexamination Certificate
2006-04-26
2008-09-16
Ho, Tu-Tu V (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
With particular semiconductor material
C257SE33008, C257S014000
Reexamination Certificate
active
07425732
ABSTRACT:
A nitride semiconductor device includes an active layer including a first nitride semiconductor layer and a second nitride semiconductor layer which are periodically stacked, the second nitride semiconductor layer having a different composition from a composition of the first nitride semiconductor layer. An energy at a lower edge of a conduction band in the first nitride semiconductor layer is lower than an energy at a lower edge of a conduction band in the second nitride semiconductor layer, and an energy at an upper edge of a valence band in the first nitride semiconductor layer is lower than an energy at an upper edge of a valence band in the second nitride semiconductor layer.
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Chichibu et al., “Effective band gap inhomogeneity and piezoelectric field in InGaN/GaN multiquantum well structures”, Applied Physics Letters 73 (1998) pp. 2006-2008.
Nakazawa Satoshi
Takizawa Toshiyuki
Ueda Daisuke
Ueda Tetsuzo
Ho Tu-Tu V
Matsushita Electric - Industrial Co., Ltd.
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