MOS transistor having adjusted threshold voltage formed along wi

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

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438209, 438203, 438217, H01L 21265

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active

056187432

ABSTRACT:
A process is disclosed (hereafter referred to as the "BiCDMOS Process") which simultaneously forms bipolar transistors, relatively high voltage CMOS transistors, relatively low voltage CMOS transistors, DMOS transistors, zener diodes, and thin-film resistors, or any desired combination of these, all on the same integrated circuit chip. The process uses a small number of masking steps, forms high performance transistor structures, and results in a high yield of functioning die. Isolation structures, bipolar transistor structures, CMOS transistor structures, DMOS transistor structures, zener diode structures, and thin-film resistor structures are also disclosed.

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