Method of manufacturing a BiCMOS semiconductor device

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

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438234, H01L 218238

Patent

active

060665203

ABSTRACT:
A method of making a BiCMOS semiconductor device in which different polysilicon layers are used to form the gate electrodes of the CMOS devices and an emitter leading electrode for the bipolar device. A first polysilicon layer forms the lower portion of the gate electrodes of the CMOS devices, while a second highly doped polysilicon layer forms a center portion of emitter leading electrode of the bipolar device.

REFERENCES:
patent: 5547893 (1996-08-01), Sung
patent: 5970333 (1999-10-01), Girs et al.

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