US PATENT SUBCLASS 438 / FOR 472
EMITTER DIP PREVENTION (OR UTILIZATION) (437/961)

Current as of: June, 1999
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438 /   HD   SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS

FOR 472EMITTER DIP PREVENTION (OR UTILIZATION) (437/961)

DEFINITION

Classification: 438/FOR.472

EMITTER DIP PREVENTION (OR UTILIZATION):

Foreign art collection involving the utilization of special diffusion techniques to eliminate the undesirable tendency of the base-collector junction to "bulge" downwardly during the emitter diffusion.