NPN type heavy current high -gain darlington transistor

The utility model provides a NPN type heavy current high -gain darlington transistor for the vehicle air conditioner speed adjusting device, this product are two chip composite's golden tube sealing, and the chip includes a N type substrate, back metal level formed at the N type substrate back, the preceding stage transistor T1's of mutual isolation P type base region and back level transistor T2's P type base region are formed with in the front of N type substrate, be formed with preceding stage transistor T1's N+ type launch site in preceding stage transistor T1's P type base region, be formed with back level transistor T2's N+ type launch site in back level transistor T2's P type base region, it has the oxide layer to cover in the front of N type substrate, still be formed with connection preceding stage transistor T1's the N+ type launch site and the connection metal level of back level transistor T2's P type base region on the positive oxide layer of N type substrate. It is good that this pair resistance darlington transistor has a heat stability, characteristics such as fast, anti the burning out nature of switching time is strong, the magnification is big.