JPS5541730A - Semiconductor device - Google Patents
Semiconductor deviceInfo
- Publication number
- JPS5541730A JPS5541730A JP11442478A JP11442478A JPS5541730A JP S5541730 A JPS5541730 A JP S5541730A JP 11442478 A JP11442478 A JP 11442478A JP 11442478 A JP11442478 A JP 11442478A JP S5541730 A JPS5541730 A JP S5541730A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- type
- layers
- layer
- substrate
- 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.)
- Granted
Links
Landscapes
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Protection Of Static Devices (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To reduce the number of diffusion processes in the manufacture of a semiconductor device by providing a second type conductive layer in a first type conductive substrate, then a pair of the first type layers in the second type layer and a same type conductive layer between the two layers, and thus forming a guard diode.
CONSTITUTION: P-type layers 22 and 23 are formed in an n-type substrate 21 by diffusion from the upper surface. An n-type layer 24 is formed in the substrate 21 while n-type layers 25 and 26∼28 are formed in the layers 22 and 23, respectively, either by selective diffusion. A gate electrode 30 is formed on the then prepared gate insulating film; a drain electrode 31 on the layer 24; a source electrode 32 on the layers 22 and 25; and electrodes 33 and 34 on the layer 23. The electrode 33 is connected to the electrode 30, while the electrode 34 to the electrode 32, to form a two-way guard diode between the electrodes 33 and 34, whereby breakdown may occur to a PN junction J11 or J12 when an excessive positive or negative voltage is applied to the electrode 30, so that the gate insulting film is protected from destruction. According to this device, the diffusion processes are performed satisfactorily only twice, and yet the substrate 21 is protected from drop in concentration.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11442478A JPS5541730A (en) | 1978-09-18 | 1978-09-18 | Semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11442478A JPS5541730A (en) | 1978-09-18 | 1978-09-18 | Semiconductor device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5541730A true JPS5541730A (en) | 1980-03-24 |
JPS6237816B2 JPS6237816B2 (en) | 1987-08-14 |
Family
ID=14637360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11442478A Granted JPS5541730A (en) | 1978-09-18 | 1978-09-18 | Semiconductor device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5541730A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6427417A (en) * | 1987-07-21 | 1989-01-30 | Kiyouzen Shoji Kk | Apparatus for inverting container of mushroom cultivation bottle |
JPH0330613A (en) * | 1989-06-29 | 1991-02-08 | Nakamura Seisakusho:Kk | Apparatus for scraping out culture medium |
JPH04360621A (en) * | 1991-06-04 | 1992-12-14 | Nakamura Seisakusho:Kk | Apparatus for scraping out culture base |
JPH04360620A (en) * | 1991-06-04 | 1992-12-14 | Nakamura Seisakusho:Kk | Apparatus for scraping out culture base |
-
1978
- 1978-09-18 JP JP11442478A patent/JPS5541730A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6427417A (en) * | 1987-07-21 | 1989-01-30 | Kiyouzen Shoji Kk | Apparatus for inverting container of mushroom cultivation bottle |
JPH0421445B2 (en) * | 1987-07-21 | 1992-04-10 | Kyozen Shoji Kk | |
JPH0330613A (en) * | 1989-06-29 | 1991-02-08 | Nakamura Seisakusho:Kk | Apparatus for scraping out culture medium |
JPH04360621A (en) * | 1991-06-04 | 1992-12-14 | Nakamura Seisakusho:Kk | Apparatus for scraping out culture base |
JPH04360620A (en) * | 1991-06-04 | 1992-12-14 | Nakamura Seisakusho:Kk | Apparatus for scraping out culture base |
JPH07108153B2 (en) * | 1991-06-04 | 1995-11-22 | 株式会社中村製作所 | Cultivation device |
JPH07108152B2 (en) * | 1991-06-04 | 1995-11-22 | 株式会社中村製作所 | Cultivation device |
Also Published As
Publication number | Publication date |
---|---|
JPS6237816B2 (en) | 1987-08-14 |
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