| 摘要 |
PROBLEM TO BE SOLVED: To prevent a decrease in breakdown voltage due to current concentration from being caused by suppressing an increase in potential difference between float layers in an extension direction of the float layers. SOLUTION: A gate electrode 7a is electrically connected to a gate wiring 11 applied with a gate voltage, and dummy gate electrodes 7b and 7c are connected to a first float wiring 12 electrically connected to a first float layer 3b; and a second float layer 3c is electrically connected to a second float wiring 13, and a third float layer 3d is electrically connected to a third float wiring 14. Thus, the dummy gate electrodes 7b and 7c are electrically connected to the first float layer 3b to obtain a structure wherein a switching surge and switching loss are balanced with each other. COPYRIGHT: (C)2009,JPO&INPIT |
