Patent ID: 7414287

Claim:
A semiconductor device, comprising: one or more lateral diffusion metal oxide semiconductor (LDMOS) transistors, each LDMOS transistor comprising a LDMOS well of a first conductivity type, a LDMOS source region of a second conductivity type formed in the LDMOS well, and a LDMOS drain region of the second conductivity type separated from the LDMOS well by a LDMOS drift region of the second conductivity type; and one or more silicon controlled rectifier-lateral diffusion metal oxide semiconductor (SCR-LDMOS) transistors, each SCR-LDMOS transistor comprising a SCR-LDMOS well of the first conductivity type, a SCR-LDMOS source region of the second conductivity type formed in the SCR-LDMOS well, a SCR-LDMOS drain region of a second conductivity type and an anode region, wherein the anode region is between the SCR-LDMOS drain region and a SCR-LDMOS drift region, wherein at least one of the SCR-LDMOS transistors and at least one of the LDMOS transistors share a common well of the first conductivity type.