High voltage transistor structure and method
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United States of America Patent
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Oct 24, 2017
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app pub date -
Feb 20, 2013
filing date -
Feb 20, 2013
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Abstract
A high voltage transistor structure comprises a first double diffused region and a second double diffused region formed in a first well of a substrate, wherein the first and second double diffused regions are of the same conductivity as the substrate, a first drain/source region formed in the first double diffused region, a first gate electrode formed over the first well and a second drain/source region formed in the second double diffused region. The high voltage transistor structure further comprises a first spacer formed on a first side of the first gate electrode, wherein the first spacer is between the first drain/source region and the first gate electrode, a second spacer formed on a second side of the first gate electrode and a first oxide protection layer formed between the second drain/source region and the second spacer.
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