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    • 36. 发明授权
    • SINGLE QUANTUM WELL RESONANT TUNNELING SEMICONDUCTOR DEVICES
    • 半导体器件共振隧穿在一个简单的量子位能POT。
    • EP0274511B1
    • 1994-12-28
    • EP87904746.2
    • 1987-05-26
    • Hughes Aircraft Company
    • SCHULMAN, Joel, N.
    • H01L29/88H01L29/205H01L29/76
    • B82Y10/00H01L29/205H01L29/7606H01L29/882
    • A single quantum well semiconductor device (10), wherein a central quantum well layer (12) is disposed between a pair of barrier layers (14) to form a quantum barrier (15), the barrier layers (14) having a composition such that a resonance energy level (18) is created in the quantum well layer (12), and having a thickness sufficiently small, so that electrons can tunnel through the quantum barrier (15) under an applied voltage. The quantum well layer (12) and barrier layers (14) are disposed between two electron injection layers (16a, 16b) having compositions selected so that the conduction band minimum energy (20) for electrons in the injection layers is about that of, but less than, the resonance energy level (18) of the quantum well (12). Electrons pass through the quantum barrier (15) by tunneling, upon application of a small voltage to the two main terminals of the device sufficient to raise electrons near the conduction band minimum energy (20) of the injection layer (16a) to the resonance energy level (18) of the quantum well. The internal voltage (Va) necessary for tunneling is reduced, as compared with conventional double barrier tunnel diodes. A higher tunneling current and a higher peak-to-valley current ratio over the negative resistance range are obtained, and the DC operating point voltage is reduced. The semiconductor device (10) can be a two-terminal device or a three-terminal device wherein a terminal for applying a voltage to the quantum barrier (15) is provided.