Patent ID: 8921903
Filing Date: 2014-12-30
Classification: H01L

Abstract:
1. A lateral junction field-effect transistor comprising: a withstand voltage keeping region of a first conductivity type; a channel region of a second conductivity type formed on said withstand voltage keeping region; a gate region of the first conductivity type formed on said channel region; a gate electrode electrically connected to said gate region and for receiving a first voltage; a source electrode and a drain electrode spaced apart from each other with said gate electrode sandwiched between the source electrode and the drain electrode, and electrically connected to said channel region; a control electrode electrically connected to an impurity region of the first conductivity type, the impurity region electrically connected to the withstand voltage keeping region of the first conductivity type, the control electrode for receiving a second voltage and applying the second voltage to said withstand voltage keeping region causing said withstand voltage keeping region and said channel region to be in a reverse biased state in an OFF operation, the first voltage being different from the second voltage wherein the source electrode is located between the control electrode and the gate electrode, and a depressed portion having a bottom located in the channel region without extending into the withstand voltage keeping region is formed laterally next to the source electrode, wherein the impurity region electrically connected to the control electrode extends from the bottom of the depressed portion into the withstand voltage keeping region.