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Technical Article
为何GaN HEMT没有雪崩击穿?
Release date:2023-04-13
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Category:Technical Article
Views:544次
GaN有很高的击穿场强(硅的10倍)
就硅器件而言,高电场导致硅PN结出现雪崩击穿
GaN HEMT 更像瓷片电容击穿,因为它的击穿点常常位于器件上部的绝缘层中(电场最集中的地方)
与硅不同之处在于,氮化镓一旦发生击穿,就是永久性的
对氮化镓而言,通常的设计余量会有30%以上,而硅器件仅有10%
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氮化镓与超结硅不同封装的结-壳热阻( RthJC )比较
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寄生电容: GaN和硅超结MOS对比
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