Circuit design for increasing charge device model immunity

摘要

A charge device model (CDM) immunity module used in a semiconductor circuit for CDM damage protection. The CDM immunity module comprises a CDM ground pad and a current directing device such as a diode coupled between the CDM ground pad and a substrate of at least one device in a core circuit to be protected, wherein the current directing device and the CDM ground pad dissipate CDM charges to avoid damage to an oxide layer of the protected device.