Semiconductor apparatus having high withstand voltage
First Claim
Patent Images
1. A semiconductor apparatus comprising:
- a support substrate;
an insulation layer provided on the support substrate;
a semiconductor layer provided on the insulation layer and including a first element formation region and a second element formation region as an island region that is surrounded by a trench region to be electrically isolated from the first element formation region;
a buffer region surrounding the island region for preventing an electrical interference between the island region and the first element formation region;
a source region and a drain region provided in the island region, a first one of the source region and the drain region being looped around a second one of the source region and the drain region;
a source electrode and a drain electrode respectively provided on the source region and the drain region, a first one of the source electrode and the drain electrode connected to the first one of the source region and the drain region, and extending between the trench region and a second one of the source electrode and the drain electrode; and
a gate electrode provided over a portion of the island region between the source region and the drain region,wherein when a first voltage having a specific polarity is applied to the first one of the source electrode and the drain electrode, a second voltage having the specific polarity is applied to one of a specific portion of the island region, the trench region, and the support substrate, the specific portion of the island region extending between the trench region and the first one of the source electrode and the drain electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
An island region surrounded by a trench is provided in an SOI substrate. The island region is further surrounded by a buffer region with a buffer region contact layer. In the island region, a source region is annularly provided around a drain region, and source and drain electrodes are respectively provided on the source and the drain regions. An annular auxiliary electrode is formed with the source electrode to extend over the trench. Accordingly, a voltage applied to the source electrode can be applied to the auxiliary electrode, so that electric field concentration between the buffer region and the source electrode is relaxed.
105 Citations
21 Claims
-
1. A semiconductor apparatus comprising:
-
a support substrate; an insulation layer provided on the support substrate; a semiconductor layer provided on the insulation layer and including a first element formation region and a second element formation region as an island region that is surrounded by a trench region to be electrically isolated from the first element formation region; a buffer region surrounding the island region for preventing an electrical interference between the island region and the first element formation region; a source region and a drain region provided in the island region, a first one of the source region and the drain region being looped around a second one of the source region and the drain region; a source electrode and a drain electrode respectively provided on the source region and the drain region, a first one of the source electrode and the drain electrode connected to the first one of the source region and the drain region, and extending between the trench region and a second one of the source electrode and the drain electrode; and a gate electrode provided over a portion of the island region between the source region and the drain region, wherein when a first voltage having a specific polarity is applied to the first one of the source electrode and the drain electrode, a second voltage having the specific polarity is applied to one of a specific portion of the island region, the trench region, and the support substrate, the specific portion of the island region extending between the trench region and the first one of the source electrode and the drain electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A semiconductor apparatus comprising:
-
a semiconductor substrate including a first element formation region and a second element formation region as an island region that is surrounded by a trench region, the trench region electrically isolating the island region from the first element formation region; a buffer region surrounding the trench region for preventing an electrical interference between the island region and the first element formation region; a source region and a drain region provided in the island region, a first one of the source region and the drain region being looped to be concentrically provided around a second one of the source region and the drain region; a source electrode and a drain electrode respectively provided on the source region and the drain region, a first one of the source electrode and the drain electrode connected to the first one of the source region and the drain region, and extending adjacently to the trench region more than a second one of the source electrode and the drain electrode; a gate electrode provided over a portion of the island region between the source region and the drain region; and an auxiliary electrode provided between the trench region and the first one of the source electrode and the drain electrode, wherein when a first voltage having a specific polarity is applied to the first one of the source electrode and the drain electrode, a second voltage having the specific polarity is applied to the auxiliary electrode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A semiconductor apparatus comprising:
-
a support substrate; an insulation layer provided on the support substrate; a semiconductor layer provided on the insulation layer and including a first island region and a second island region respectively surrounded by a first trench region and a second trench region to be electrically isolated from one another; a first semiconductor element provided in the first island region and including; a first source region and a first drain region provided in the first island region, a first one of the first source region and the first drain region being looped around a second one of the first source region and the first drain region; a first source electrode and a first drain electrode respectively provided on the first source region and the first drain region; and a first gate electrode provided over a portion of the first island region between the first source region and the first drain region; and support substrate connection means electrically connected to the support substrate for applying a voltage to the support substrate so that a potential difference between the support substrate and the first one of the first source region and the first drain region becomes small. - View Dependent Claims (20, 21)
-
Specification