Bipolar sinker structure and process for forming same

Details Bipolar sinker structure and process for forming same Bipolar sinker structure and process for forming same

1988-12-28

1991-03-19

James, Andrew J.

357 47, 357 49, H01L 2122, H01L 2144, H01L 2108

Patent

active

050015389

ABSTRACT:
A sinker which is self-aligned with the oxide isolating trench which is used to define the tub in which the complete bipolar device is located. In a preferred approach to the process for forming the sinker of this invention, little additional diffusion of the sinker occurs during subsequent processing, whereby an effective sinker, aligned with the collector of the bipolar device, is achieved without additional masking steps.

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