Superjunction semiconductor device
First Claim
1. A superjunction semiconductor device having an active region and a termination region surrounding the active region, a central vertical axis of a boundary column of a second conductivity type material defining the boundary between the active region and the termination region, the active and termination regions including columns of first and second conductivity type material alternately arranged along a horizontal direction in a semiconductor region having top and bottom surfaces,wherein the spacing between the central vertical axes of the boundary column and a first column of the second conductivity type material in the termination region placed closest to the boundary column is equal to the spacing between the central vertical axes of the boundary column and a second column of the second conductivity type material in the active region placed closest to the boundary column, and the width of the first column is greater than the width of the second column.
3 Assignments
0 Petitions
Accused Products
Abstract
In accordance with an embodiment of the invention, a superjunction semiconductor device includes an active region and a termination region surrounding the active region. A central vertical axis of a boundary column of a second conductivity type material defines the boundary between the active region and the termination region. The active and termination regions include columns of first and second conductivity type material alternately arranged along a horizontal direction in a semiconductor region having top and bottom surfaces. At least one of the columns of the first conductivity type material in the termination region has a different width than a width of the columns of the first conductivity type material in the active region.
-
Citations
20 Claims
-
1. A superjunction semiconductor device having an active region and a termination region surrounding the active region, a central vertical axis of a boundary column of a second conductivity type material defining the boundary between the active region and the termination region, the active and termination regions including columns of first and second conductivity type material alternately arranged along a horizontal direction in a semiconductor region having top and bottom surfaces,
wherein the spacing between the central vertical axes of the boundary column and a first column of the second conductivity type material in the termination region placed closest to the boundary column is equal to the spacing between the central vertical axes of the boundary column and a second column of the second conductivity type material in the active region placed closest to the boundary column, and the width of the first column is greater than the width of the second column.
-
7. A superjunction semiconductor device having an active region and a termination region surrounding the active region, a central vertical axis of a boundary column of a second conductivity type material defining the boundary between the active region and the termination region, the active and termination regions including columns of first and second conductivity type material alternately arranged along a horizontal direction in a semiconductor region having top and bottom surfaces,
wherein the spacing between the central vertical axes of adjacent columns of the second conductivity type material in the termination region becomes progressively greater in a direction away from the active region along a horizontal direction.
-
9. A superjunction semiconductor device having an active region and a termination region surrounding the active region, a central vertical axis of a boundary column of a second conductivity type material defining the boundary between the active region and the termination region, the active and termination regions including columns of first and second conductivity type material alternately arranged in a semiconductor region,
wherein at least one of the columns of the first conductivity type material in the termination region has a different width than a width of the columns of the first conductivity type material in the active region, and wherein the columns of the second conductivity type material in the termination and active regions are of the same width.
Specification