双极型晶体管原理 ADD BORON ( B)TO GET P DOPED REGION UNBOUND ELECTRONS CURRENT FLOW ELECTRON FLOW 000.0 FORWARD BIASED JUNCTION ALLOWS CURRENT FLOW 000 DEPLETION REGION ABSENCE OF ELECTRONS OR"HOLES PHOSPHOROUS DOPIN ELECTRON FLOW CURRENT FLOW P-N JUNCTION REVERSE BIASED JUNCTION 电子材料与器件工艺一绪论电子材料与器件工艺－绪论 7 双极型晶体管原理