摘要:
An elastic printed board (102) is provided so that stress applied by the silicon gel (101) is absorbed by the printed board (102). Further, the printed board (102) is formed to be so narrow that the stress may be escaped. On the other hand, the wires on which a high voltage is applied are patterned on respective printed boards. This serves to prevent discharge through the surface of the same printed board served as current passage. This design makes it possible to hermetically close the power module, prevent intrusion of moisture or contamination as well as displacement, transformation and crack of the cover plate (105).
摘要:
An elastic printed board (102) is provided so that stress applied by the silicon gel (101) is absorbed by the printed board (102). Further, the printed board (102) is formed to be so narrow that the stress may be escaped. On the other hand, the wires on which a high voltage is applied are patterned on respective printed boards. This serves to prevent discharge through the surface of the same printed board served as current passage. This design makes it possible to hermetically close the power module, prevent intrusion of moisture or contamination as well as displacement, transformation and crack of the cover plate (105).
摘要:
An area of a narrow interval between neighboring insulating gates (7) and an area of a wide interval are provided and in the area of a wide interval, a p-type well layer deeper (9) than a p-type base layer is provided. By use of this constitution, even if an area of a narrow interval between neighboring insulating gates and an area of a wide interval are provided, the withstand voltage will not be lowered.
摘要:
An IGBT according to the present invention has an N-layer having a larger carrier concentration and being deeper than a substrate on the collector side and a lowly injected p-layer realizing a low switching loss on the collector side, wherein the maximum of the carrier concentration of the p-layer on the collector side is 10 to 100 times of the maximum of the carrier concentration of the n-layer adjoining the p-layer and the turn-off loss is reduced without lowering a reverse bias safety operation area (RBSOA) of the IGBT.
摘要:
An IGBT according to the present invention has an N-layer having a larger carrier concentration and being deeper than a substrate on the collector side and a lowly injected p-layer realizing a low switching loss on the collector side, wherein the maximum of the carrier concentration of the p-layer on the collector side is 10 to 100 times of the maximum of the carrier concentration of the n-layer adjoining the p-layer and the turn-off loss is reduced without lowering a reverse bias safety operation area (RBSOA) of the IGBT.
摘要:
An area of a narrow interval between neighboring insulating gates and an area of a wide interval are provided and in the area of a wide interval, a p-type well layer deeper than a p-type base layer is provided. By use of this constitution, even if an area of a narrow interval between neighboring insulating gates and an area of a wide interval are provided, the withstand voltage will not be lowered.
摘要:
An elastic printed board (102) is provided so that stress applied by the silicon gel (101) is absorbed by the printed board (102). Further, the printed board (102) is formed to be so narrow that the stress may be escaped. On the other hand, the wires on which a high voltage is applied are patterned on respective printed boards. This serves to prevent discharge through the surface of the same printed board served as current passage. This design makes it possible to hermetically close the power module, prevent intrusion of moisture or contamination as well as displacement, transformation and crack of the cover plate (105).