US PATENT SUBCLASS 438 / 340
.~ Making plural bipolar transistors of differing electrical characteristics

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438 /   HD   SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS

309  DF  FORMING BIPOLAR TRANSISTOR BY FORMATION OR ALTERATION OF SEMICONDUCTIVE ACTIVE REGIONS {25}
340.~ Making plural bipolar transistors of differing electrical characteristics

DEFINITION

Classification: 438/340

Making plural bipolar transistors of differing electrical characteristics:

(under subclass 309) Process for making multiple bipolar transistors possessing differing electrical properties.