Super junction trench power MOSFET devices
First Claim
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1. A super junction trench power metal oxide semiconductor field effect transistor (MOSFET) device having a channel of first type dopant, said device comprising:
- a first column comprising insulating material that separates a column of second type dopant from a first column of said first type dopant;
a second column comprising insulating material that separates said column of said second type dopant from a second column of said first type dopant;
a gate element for a field effect transistor, wherein said gate element is aligned between said first column of insulating material and said second column of insulating material and is positioned above said column of said second type dopant; and
a trench formed between said gate element and an adjacent gate element, said trench extending into said first column of said first type dopant, said trench filled with source metal.
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Abstract
In a super junction trench power MOSFET (metal oxide semiconductor field effect transistor) device, a column of p-type dopant in the super junction is separated from a first column of n-type dopant by a first column of oxide and from a second column of n-type dopant by a second column of oxide. In an n-channel device, a gate element for the FET is advantageously situated over the column of p-type dopant; and in a p-channel device, a gate element for the FET is advantageously situated over the column of n-type dopant.
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Citations
11 Claims
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1. A super junction trench power metal oxide semiconductor field effect transistor (MOSFET) device having a channel of first type dopant, said device comprising:
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a first column comprising insulating material that separates a column of second type dopant from a first column of said first type dopant; a second column comprising insulating material that separates said column of said second type dopant from a second column of said first type dopant; a gate element for a field effect transistor, wherein said gate element is aligned between said first column of insulating material and said second column of insulating material and is positioned above said column of said second type dopant; and a trench formed between said gate element and an adjacent gate element, said trench extending into said first column of said first type dopant, said trench filled with source metal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification