Method for manufacturing a semiconductor device and semiconductor device
First Claim
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1. A method for manufacturing a semiconductor device, comprising:
- providing a semiconductor substrate with an active region and a margin region adjacent to the active region, wherein the active region comprises trenches filled with conductive material in the semiconductor substrate; and
breaking through a spacer layer having varying thickness, in the margin region at a selected location and removing at least part of the spacer layer in the active region; and
selecting the location such that, on condition that the spacer layer in the active region is removed such that at least part of the semiconductor mesa structure is exposed and the conductive material in the trenches is not exposed, the spacer layer in the margin region is removed to the conductive layer and not to the semiconductor substrate.
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Abstract
A method for manufacturing a semiconductor device and semiconductor device. One embodiment provides a semiconductor substrate with an active region and a margin region bordering on the active region. The spacer layer in the margin region is broken through at a selected location and at least part of the spacer layer is removed in the active region using a common process. The location is selected such that at least part of the semiconductor mesa structure is exposed and the spacer layer in the margin region is broken through to the conductive layer and not to the semiconductor substrate.
6 Citations
13 Claims
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1. A method for manufacturing a semiconductor device, comprising:
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providing a semiconductor substrate with an active region and a margin region adjacent to the active region, wherein the active region comprises trenches filled with conductive material in the semiconductor substrate; and breaking through a spacer layer having varying thickness, in the margin region at a selected location and removing at least part of the spacer layer in the active region; and selecting the location such that, on condition that the spacer layer in the active region is removed such that at least part of the semiconductor mesa structure is exposed and the conductive material in the trenches is not exposed, the spacer layer in the margin region is removed to the conductive layer and not to the semiconductor substrate. - View Dependent Claims (2, 3, 4)
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5. A method for manufacturing a semiconductor device, comprising:
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providing a semiconductor substrate with an active region and a margin region adjacent to the active region, wherein the active region comprises trenches filled with conductive material in the semiconductor substrate, wherein the conductive material in the trenches is insulated from the semiconductor substrate by an insulation layer, and wherein a semiconductor mesa structure is formed between each two trenches, wherein a layer of the conductive material, insulated from the semiconductor substrate by an insulation layer and short-circuited with the conductive material in the trenches, is formed in the margin region, and wherein a spacer layer comprising a varying thickness in the margin region is formed over the semiconductor substrate; and breaking through the spacer layer in the margin region at a selected location and removing at least part of the spacer layer in the active region, using a common process, wherein the location is selected such that, on condition that the spacer layer in the active region is removed such that at least part of the semiconductor mesa structure is exposed and the conductive material in the trenches is not exposed, the spacer layer in the margin region is removed to the conductive layer and not to the semiconductor substrate. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification