| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite type semiconductor element where voltage to be turned on is easily set to a desired value. SOLUTION: The composite type semiconductor element is provided with a thyristor consisting of an n1 area 11, a p1 area 12, an n2 area 13 and a p2 area 14, a first diode consisting of a first p-type semiconductor area 15 and a first n-type semiconductor area 16 and connected to the p1 area, and a second diode consisting of a second p-type semiconductor area 17 and a second n-type semiconductor area 18 and connected to the n1 area. The first and second diodes are connected in series so that the flowing direction of currents flowing through each by breakdown. By properly increasing the number of diodes to be connected, it is possible to make the thyristor turn on a desired high voltage. COPYRIGHT: (C)2004,JPO&NCIPI
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