Semiconductor device with FET MESA structure and vertical contact electrodes
First Claim
1. A semiconductor device comprising a semiconductor body comprising a field effect device, the semiconductor body having source and drain regions spaced apart by a body, region, the field effect device having a gate structure for controlling a conduction channel in a conduction channel accommodating portion of the body region between the source and drain regions, wherein the field effect device comprises a mesa structure having end walls and side walls, the source and drain regions meet respective end walls and part of the side walls of the mesa structure, source and drain electrodes contact the source and drain regions respectively along a depth of the walls of the mesa structure, the body region extends between and meets the side walls of the mesa structure, and the gate structure extends along and between the side walls such that the conduction channel accommodating portion extends along and between the side walls.
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Accused Products
Abstract
A semiconductor device comprises one or more field effect devices (FD) having source and drain regions (5 and 6) spaced apart by a body region (3a). A gate structure (7a, 7b), preferably in a trench (4), controls a conduction channel in a portion (3b) of the body region (3a) between the source and drain regions. The device has one or more mesa structures (100) having end and side walls (100a to 100d). The body region (3a) extends between and meets at least the side walls (100c and 100d) of the mesa structure. The gate structure (7a, 7b) extends along and between the side walls such that the conduction channel accommodating portion (3b) extends along and between the side walls (100c and 100d). The source and drain regions (5 and 6) meet respective end walls (100a and 100b) of the mesa structure and/or its side walls (100c and 100d). At the mesa walls, a source electrode (S) contacts the source region (5) and a drain electrode (D) contacts the drain region (6). (FIGS. 12 and 13)
36 Citations
20 Claims
- 1. A semiconductor device comprising a semiconductor body comprising a field effect device, the semiconductor body having source and drain regions spaced apart by a body, region, the field effect device having a gate structure for controlling a conduction channel in a conduction channel accommodating portion of the body region between the source and drain regions, wherein the field effect device comprises a mesa structure having end walls and side walls, the source and drain regions meet respective end walls and part of the side walls of the mesa structure, source and drain electrodes contact the source and drain regions respectively along a depth of the walls of the mesa structure, the body region extends between and meets the side walls of the mesa structure, and the gate structure extends along and between the side walls such that the conduction channel accommodating portion extends along and between the side walls.
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15. A semiconductor device comprising a field effect device formed as a mesa structure with source and drain regions at opposite ends of a trench formed in the mesa structure, a gate structure provided within the trench on bottom and side walls of the trench to control a conduction channel between the source and drain regions, and source and drain electrodes that extend along and contact a depth of the source and drain regions.
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16. A semiconductor device comprising a semiconductor body that comprises a field effect device, wherein the semiconductor body comprises source and drain regions spaced apart by a body region, and wherein the field effect device comprises:
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a gate structure for controlling a conduction channel in a conduction channel accommodating portion of the body region between the source and drain regions;
a mesa structure having end walls and side walls, wherein the source and drain regions meet respective end walls and part of the side walls of the mesa structure, and wherein the gate structure extends along and between the side walls such that the conduction channel accommodating portion extends along and between the side walls; and
source and drain electrodes contacting the source and drain regions along a depth of the source and drain regions. - View Dependent Claims (17, 18, 19, 20)
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Specification