JPS55111146A - Semiconductor integrated circuit - Google Patents
Semiconductor integrated circuitInfo
- Publication number
- JPS55111146A JPS55111146A JP1937179A JP1937179A JPS55111146A JP S55111146 A JPS55111146 A JP S55111146A JP 1937179 A JP1937179 A JP 1937179A JP 1937179 A JP1937179 A JP 1937179A JP S55111146 A JPS55111146 A JP S55111146A
- Authority
- JP
- Japan
- Prior art keywords
- region
- type
- insulating film
- integrated circuit
- islet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Element Separation (AREA)
- Semiconductor Integrated Circuits (AREA)
- Bipolar Integrated Circuits (AREA)
Abstract
PURPOSE: To make reliability higher by protecting integrated circuit against abnormal voltage by a construction wherein above the islet region between the isolation junction region and high density region that lies in the islet region the metal layer which has certain voltage level is disposed through an insulating film.
CONSTITUTION: An n-type silicon epitaxial layer 16 is formed on the p-type silicon substrate 17 and islet region is divided by the p-type isolation region 18. In the inlet region the p-type base region 20, n-type emitter region 19 and collector region 13 of high impurity density are formed and they are covered by the insulating film 15. The insulating film 15 which covers the epitaxial layer between the n+-type high density area 13 and the isolation area 18 has proper thickness and on it there is a gate structure covered with the metal wiring 12. By this construction when abnormal voltage is applied through the metal wiring 14 an p-type reversed area is generated under the metal wiring 12 and breakdown takes place at lower voltage and absorption of abnormal voltage is performed and thus protection of integrated circuit is possible.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1937179A JPS55111146A (en) | 1979-02-21 | 1979-02-21 | Semiconductor integrated circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1937179A JPS55111146A (en) | 1979-02-21 | 1979-02-21 | Semiconductor integrated circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55111146A true JPS55111146A (en) | 1980-08-27 |
Family
ID=11997468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1937179A Pending JPS55111146A (en) | 1979-02-21 | 1979-02-21 | Semiconductor integrated circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55111146A (en) |
-
1979
- 1979-02-21 JP JP1937179A patent/JPS55111146A/en active Pending
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