Semiconductor switch device
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United States of America Patent
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Dec 18, 2018
Grant Date -
Feb 22, 2018
app pub date -
Aug 15, 2017
filing date -
Aug 17, 2016
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Abstract
A method of making a semiconductor switch device and a semiconductor switch device made according to the method. The method includes depositing a gate dielectric on a major surface of a substrate. The method also includes depositing and patterning a gate electrode on the gate dielectric. The method further includes depositing an oxide to cover the top surface and sidewall(s) of the gate electrode. The method also includes, after depositing the oxide, performing a first ion implantation process at a first implantation dosage for forming a lightly doped drain region of the switch device. The method further includes forming sidewall spacers on the sidewall(s) of the gate electrode. The method also includes performing a second ion implantation process at a second implantation dosage for forming a source region and a drain region of the semiconductor switch device. The second implantation dosage is greater than the first implantation dosage.
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