Semiconductor device and radio frequency module formed on high resistivity substrate

Patent metadata

Field	Value
Publication number	US-9755068-B2
Application number	US-201615041594-A
Country	US
Kind code	B2
Filing date	Feb 11, 2016
Priority date	Jun 18, 2015
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

In embodiments, a semiconductor device includes a high resistivity substrate, a transistor disposed on the high resistivity substrate, and a deep trench device isolation region disposed in the high resistivity substrate to surround the transistor. Particularly, the high resistivity substrate has a first conductive type, and a deep well region having a second conductive type is disposed in the high resistivity substrate. Further, a first well region having the first conductive type is disposed on the deep well region, and the transistor is disposed on the first well region.

First claim

What is claimed is:

1. A semiconductor device comprising:
a high resistivity substrate having a first conductivity type;
a deep having a second conductivity type and disposed in the high resistivity substrate;
a first well region having the first conductivity type and disposed on the deep well region;
a transistor disposed on the first well region;
a deep trench device isolation rein disposed in the high resistivity substrate to surround the transistor;
a second well region having the second conductivity type and disposed outside the deep trench device isolation region; and
a second high concentration impurity region having the second conductivity type disposed on the second well region.

2. The semiconductor device of claim 1 , further comprising:
a shallow trench device isolation region disposed on the deep trench device isolation region.

3. The semiconductor device of claim 1 , wherein the transistor comprises:
a gate structure disposed on the high resistivity substrate;
a source region and a drain region disposed at surface portions of the high resistivity substrate adjacent to both sides of the gate structure, respectively; and
high concentration impurity region disposed on one side of the source region.

4. The semiconductor device of claim 3 , wherein the source region has a second conductive type;
the high concentration impurity region has a first conductive type; and
the source region and the high concentration impurity region are electrically connected with each other.

5. The semiconductor device of claim 1 , wherein the deep well region is disposed wider than the first well region, and the deep trench device isolation region extends through the deep well region so as to be deeper than the deep well region.

6. The semiconductor device of claim 1 , wherein the deep trench device isolation region has a slit, to electrically connect the deep well region with the second well region.

7. The semiconductor device of claim 1 , wherein a third well region having the first conductive type is disposed outside the second well region.

8. The semiconductor device of claim 1 , wherein a second device isolation region is disposed to surround the second well region and the second high concentration impurity region.

9. The semiconductor device of claim 8 , wherein the second device isolation region comprises:
a second deep trench device isolation region disposed to surround the second well region; and
a second shallow trench device isolation region disposed on the second deep trench device isolation region.

10. The semiconductor device of claim 8 , wherein a third well region having the first conductive type is disposed outside the second device isolation region.

11. A semiconductor device comprising:
a high resistivity substrate having a first conductive type;
a deep well region having a second conductive type and disposed in the high resistivity substrate;
a first, well region having the first conductive type and disposed on the deep well region;
a plurality of transistors disposed on the first well region; and
a deep trench device isolation region having a ring shape to surround the plurality of transistors and disposed deeper than the deep well region.

12. The semiconductor device of claim 11 , wherein plurality of transistors is disposed in a multi-finger structure in which the plurality of transistors is electrically connected with one another.

13. The semiconductor device of claim 12 , wherein a high concentration impurity region having the first conductive type is disposed between source regions of transistors disposed adjacent with each other among the plurality of transistors; and
the high concentration impurity region and the regions of the adjacent transistor are electrically connected with one another.

14. The semiconductor device of claim 11 , wherein a second well region having the second conductive type is disposed outside the deep trench device isolations region;
a second high concentration impurity region having the second conductive type is disposed on the second well region; and
the deep trench device isolation region has a slit to electrically connect the deep well region with the second well region.

15. The semiconductor device of 14 , wherein second deep trench device isolation region is disposed outside the second well region;
a third well region having the first conductive type is disposed outside the second deep trench device isolation region; and
a third high concentration impurity region having the first conductive type is disposed on the third well region.

16. A radio frequency (RF) module comprising:
an RF switching device disposed on a high resistivity substrate;
an RF active device disposed on the high resistivity substrate;
an RF passive device disposed on the high resistivity substrate; and
a control device disposed on the high resistivity substrate,
wherein at least one of the RF switching device and the RF active device comprises:
a transistor disposed on the high resistivity substrate; and
a deep trench device isolation region disposed in the high resistivity substrate to surround the transistor.

17. A semiconductor device comprising:
a high resistivity substrate having a first conduct type;
a deep well region having a second conductive type and disposed in the high resistivity substrate;
a first well region having the first conductive type and disposed on the deep well region;
a transistor disposed on the first well region;
a deep trench device isolation region disposed in the high resistivity substrate to surround the transistor;
a second well region having the first conductive type and disposed outside the deep trench device isolation region; and
a second high concentration impurity region having the first conductive type and disposed on the second well region.

18. The semiconductor device of claim 17 , wherein the deep well region and the first well region are disposed inside the deep trench device isolation region, and the deep trench device isolation region is formed deeper than the deep well region.

Assignees

• Dongbu Hitek Co Ltd

Inventors

• Cho Yong Soo

Classifications

• H10W44/20

  at high-frequency [HF] or radio frequency [RF] · CPC title

• H01L29/36

  Electricity · mapped topic

• H01L29/0607

  Electricity · mapped topic

• H01L29/0653

  Electricity · mapped topic

• H01L29/7816 Primary

  Electricity · mapped topic