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Openai/69174844-9774-8012-8b69-32262ca5e35a
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==== 1. 肖特基接触：势垒 = 主角 - 接触区本身就是器件的功能核心。 - 电流大小由势垒高度 ΦB 控制。 - 如肖特基二极管、金属–半导体探测器中，势垒承担“开关”作用。 ==== # 欧姆接触：势垒 = 路障（要消除的） - 接触只是载流子进出半导体的“通道”。 - 理想状态下，界面几乎不改变半导体的电势分布。 - 所以我们在 MOSFET、LED 等器件中刻意做成欧姆接触，让接触不参与器件功能，只传电流。
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