Haifang Zhang

Method for manufacturing collector region and collector region buried layer of bipolar transistor

Novel Manufacturing Approach for Collector and N Type Buried Layer Of Bipolar Transistor

Manufacturing approach for collector and a buried layer of bipolar transistor

Manufacturing technology for collector region and collector region buried layer of bipolar transistor

Method for improving isolation of emitting electrode and base electrode polysilicon side wall

Electrode lead-out structure in STI process

Method for improving impurity concentration distribution of impurity injection type polysilicon emitter

Method for manufacturing oxide layer/ nitride layer/ oxide layer side wall

L-shaped silicon germanium heterojunction transistor and preparation method thereof

Electrode lead-out structure in insulation process