Vertical power MOSFET and methods of forming the same
First Claim
1. A device comprising:
- a semiconductor layer of a first conductivity type;
a first and a second body region over the semiconductor layer, wherein the first and the second body regions are of a second conductivity type opposite to the first conductivity type;
a doped semiconductor region of the first conductivity type between and contacting the first and the second body regions, wherein the doped semiconductor region has a bottom portion extending into the semiconductor layer to separate a top surface layer of the semiconductor layer into a first region and a second region;
a gate dielectric layer over the first and the second body regions and the doped semiconductor region; and
a first gate electrode and a second gate electrode over the gate dielectric layer, and overlapping the first and the second body regions, respectively, wherein the first and the second gate electrodes are physically separated from each, and are electrically interconnected, and wherein the doped semiconductor region is overlapped by a region between the first and the second gate electrodes.
0 Assignments
0 Petitions
Accused Products
Abstract
A device includes a semiconductor layer of a first conductivity type, and a first and a second body region over the semiconductor layer, wherein the first and the second body regions are of a second conductivity type opposite the first conductivity type. A doped semiconductor region of the first conductivity type is disposed between and contacting the first and the second body regions. A gate dielectric layer is disposed over the first and the second body regions and the doped semiconductor region. A first and a second gate electrode are disposed over the gate dielectric layer, and overlapping the first and the second body regions, respectively. The first and the second gate electrodes are physically separated from each other by a region, and are electrically interconnected. The region between the first and the second gate electrodes overlaps the doped semiconductor region.
30 Citations
20 Claims
-
1. A device comprising:
-
a semiconductor layer of a first conductivity type; a first and a second body region over the semiconductor layer, wherein the first and the second body regions are of a second conductivity type opposite to the first conductivity type; a doped semiconductor region of the first conductivity type between and contacting the first and the second body regions, wherein the doped semiconductor region has a bottom portion extending into the semiconductor layer to separate a top surface layer of the semiconductor layer into a first region and a second region; a gate dielectric layer over the first and the second body regions and the doped semiconductor region; and a first gate electrode and a second gate electrode over the gate dielectric layer, and overlapping the first and the second body regions, respectively, wherein the first and the second gate electrodes are physically separated from each, and are electrically interconnected, and wherein the doped semiconductor region is overlapped by a region between the first and the second gate electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A device comprising:
-
a semiconductor layer of a first conductivity type; a first and a second body region over the semiconductor layer and having a second conductivity type opposite to the first conductivity type; a doped semiconductor region of the first conductivity type between the first and the second body regions, wherein bottoms of the doped semiconductor region and the first and the second body regions are in contact with top surfaces of the semiconductor layer; a gate dielectric layer over the first and the second body regions and the doped semiconductor region; a first and a second gate electrode over the gate dielectric layer, and overlapping the first and the second body regions, respectively, wherein the first and the second gate electrodes are physically separated from each other by a region, and are electrically interconnected; a source region comprising first portions over the first and the second body regions, and a second portion in the region between the first and the second gate electrodes, with the second portion of the source region being at a same level as portions of the first and the second gate electrodes; and a drain region underlying the semiconductor layer and comprising metal, wherein the source region and the drain region are on opposite sides of a region that comprises the first and the second body regions. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A device comprising:
-
a semiconductor layer of a first conductivity type; a first and a second body region in a surface region of the semiconductor layer and having a second conductivity type opposite to the first conductivity type; a doped semiconductor region of the first conductivity type between the first and the second body regions, wherein bottoms of the doped semiconductor region and the first and the second body regions are in contact with top surfaces of the semiconductor layer; a gate dielectric layer over the first and the second body regions and the doped semiconductor region; a first and a second gate electrode over the gate dielectric layer, and overlapping the first and the second body regions, respectively, wherein the first and the second gate electrodes are physically separated, and are electrically interconnected; a metal line connecting the first gate electrode to the second gate electrode; a conductive field plate physically separated from the first gate electrode and the second gate electrode, wherein the conductive field plate is electrically connected to the metal line, and the conductive field plate comprising; a first portion and a second portion directly over the first and the second gate electrodes, respectively; and a third portion connecting the first portion to the second portion of the conductive field plate. - View Dependent Claims (17, 18, 19, 20)
-
Specification