MANUFACTURING METHOD FOR SEMICONDUCTOR DEVICE HAVING DEEP SUB-COLLECTOR REGION
PROBLEM TO BE SOLVED: To provide a method for forming a BiCMOS device comprising a deep sub-collector region and a self-aligning mark. SOLUTION: There are provided a step (a) where a layer with a first pattern comprising a thick dielectric material is formed on the surface of a material stack formed...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
20.12.2002
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide a method for forming a BiCMOS device comprising a deep sub-collector region and a self-aligning mark. SOLUTION: There are provided a step (a) where a layer with a first pattern comprising a thick dielectric material is formed on the surface of a material stack formed on a semiconductor substrate through lithography, a step (b) where high energy/high dose injection is performed via an opening of the first layer as well as the material stack to form at least one deep sub-collector region in the semiconductor substrate, a step (c) where a layer with a second pattern (photoresist or dielectrics) is formed by lithography, and a step (d) where etching is performed through the material stack for forming an alignment mark in the semiconductor substrate, which is positioned below, using the layer with the first pattern as an alignment mark mask. |
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Bibliography: | Application Number: JP20020101203 |