Integrated circuit diode
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United States of America Patent
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Jun 16, 2015
Grant Date -
Sep 19, 2013
app pub date -
Apr 25, 2013
filing date -
May 10, 2011
priority date (Note) -
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Abstract
A method includes forming isolation regions in a semiconductor substrate to define a first field effect transistor (FET) region, a second FET region, and a diode region, forming a first gate stack in the first FET region and a second gate stack in the second FET region, forming a layer of spacer material over the second FET region and the second gate stack, forming a first source region and a first drain region in the first FET region and a first diode layer in the diode region using a first epitaxial growth process, forming a hardmask layer over the first source region, the first drain region, the first gate stack and a portion of the first diode layer, and forming a second source region and a second drain region in the first FET region and a second diode layer on the first diode layer using a second epitaxial growth process.
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