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US08907419B2 LDMOS with enhanced safe operating area (SOA) and method therefor 有权
LDMOS具有增强的安全操作区(SOA)及其方法

LDMOS with enhanced safe operating area (SOA) and method therefor
Abstract:
A laterally double diffused metal oxide semiconductor device includes a well region having a first conductivity, a first carrier redistribution region having the first conductivity type, wherein the second well region is under the well region, and a highly doped buried layer under the second well region. The highly doped buried layer has the first conductivity type and has a dopant concentration less than that of the well region and less than that of the first carrier redistribution region, and the buried layer is tied to the first well region. In addition, a method for forming the laterally double diffused metal oxide semiconductor device, which may use epitaxial growth, is disclosed.
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