Semiconductor power device having a top-side drain using a sinker trench
First Claim
1. A semiconductor power device comprising:
- a plurality of groups of stripe-shaped gate trenches extending in a silicon region over a substrate; and
a plurality of stripe-shaped sinker trenches each extending between two adjacent groups of the plurality of groups of stripe-shaped gate trenches, the plurality of stripe-shaped sinker trenches extending from a top surface of the silicon region through the silicon region and terminating within the substrate, the plurality of stripe-shaped sinker trenches being lined with an insulator along the sinker trench sidewalls so that a conductive material filling each sinker trench makes electrical contact with the substrate along the bottom of the sinker trench and makes electrical contact with an interconnect layer, wherein the plurality of sinker trenches are wider and extend deeper than the plurality of groups of stripe-shape gate trenches.
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Accused Products
Abstract
A semiconductor power device includes a plurality of groups of stripe-shaped gate trenches extending in a silicon region over a substrate, and a plurality of stripe-shaped sinker trenches each extending between two adjacent groups of the plurality of groups of stripe-shaped gate trenches. The plurality of stripe-shaped sinker trenches extend from a top surface of the silicon region through the silicon region and terminate within the substrate. The plurality of stripe-shaped sinker trenches are lined with an insulator along the sinker trench sidewalls so that a conductive material filling each sinker trench makes electrical contact with the substrate along the bottom of the sinker trench and makes electrical contact with an interconnect layer along the top of the sinker trench.
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Citations
14 Claims
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1. A semiconductor power device comprising:
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a plurality of groups of stripe-shaped gate trenches extending in a silicon region over a substrate; and a plurality of stripe-shaped sinker trenches each extending between two adjacent groups of the plurality of groups of stripe-shaped gate trenches, the plurality of stripe-shaped sinker trenches extending from a top surface of the silicon region through the silicon region and terminating within the substrate, the plurality of stripe-shaped sinker trenches being lined with an insulator along the sinker trench sidewalls so that a conductive material filling each sinker trench makes electrical contact with the substrate along the bottom of the sinker trench and makes electrical contact with an interconnect layer, wherein the plurality of sinker trenches are wider and extend deeper than the plurality of groups of stripe-shape gate trenches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification