JPS5543881A - Small-signal transistor - Google Patents
Small-signal transistorInfo
- Publication number
- JPS5543881A JPS5543881A JP11721978A JP11721978A JPS5543881A JP S5543881 A JPS5543881 A JP S5543881A JP 11721978 A JP11721978 A JP 11721978A JP 11721978 A JP11721978 A JP 11721978A JP S5543881 A JPS5543881 A JP S5543881A
- Authority
- JP
- Japan
- Prior art keywords
- region
- base
- emitter region
- semiconductor
- emitter
- 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
- Bipolar Transistors (AREA)
Abstract
PURPOSE: To obtain low-noise characteristics with a smaller chip area, by reducing the concentration of an impurity to be added to a semiconductor crystal and separating the junction away from a high impurity concentration region.
CONSTITUTION: Collector region 1 and base region 2 are the same as in conventional devices. But, emitter region 3 consists of many narrow band-shaped regions. Base electrode 6 is the same as in conventional devices. But, emitter region 7 is pulled out on an insulator formed on the semiconductor base, and a part of it forms a wire-bonding region. In this way, the base region and the emitter region are formed in the semiconductor chip and exposed on one of its main surfaces; the depth of the base region is more than 2μm and the emitter region occupies an area more than 1/10 of the chip area; and the electrode bonding region connected to the emitter region is placed on the insulator which is provided on one main surface of the semiconductor chip.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11721978A JPS5543881A (en) | 1978-09-21 | 1978-09-21 | Small-signal transistor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11721978A JPS5543881A (en) | 1978-09-21 | 1978-09-21 | Small-signal transistor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5543881A true JPS5543881A (en) | 1980-03-27 |
Family
ID=14706335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11721978A Pending JPS5543881A (en) | 1978-09-21 | 1978-09-21 | Small-signal transistor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5543881A (en) |
-
1978
- 1978-09-21 JP JP11721978A patent/JPS5543881A/en active Pending
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