Patent ID: 8482031

Claim:
Lateral Insulated Gate Bipolar Transistor (LIGBT) comprising: a first contact region of a first conductivity type; a second contact region of said first conductivity type; a source region of a second, opposite conductivity type located within a well region of said first conductivity type and connected electrically to said second contact region; a lateral drift region of the second conductivity type located between the said well region and said first contact region, said lateral drift region to be depleted of mobile carriers during an off-state blocking mode of the LIGBT and able to conduct charge during an on-state conducting mode of the LIGBT; and an insulated gate placed above and in direct contact to said well region, said insulated gate to control charge in a channel region between said lateral drift region and said source region of said second conductivity type and to thereby control flow of charge within the said drift region, wherein said first contact region is a charge injection region to inject charge towards said lateral drift region and has a peak doping concentration lower than about 1×10 19 /cm 3 .