JPS54102881A - Overload protection unit for semiconductor - Google Patents
Overload protection unit for semiconductorInfo
- Publication number
- JPS54102881A JPS54102881A JP913178A JP913178A JPS54102881A JP S54102881 A JPS54102881 A JP S54102881A JP 913178 A JP913178 A JP 913178A JP 913178 A JP913178 A JP 913178A JP S54102881 A JPS54102881 A JP S54102881A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- layer
- semiconductor
- junction depth
- npn
- 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
- Bipolar Transistors (AREA)
Abstract
PURPOSE: To protect overload with greater with greater dielectric strength and high reliability, by forming continuously NPN or PNP junction different in avalanche voltage in one semiconductor.
CONSTITUTION: The pellet 9 has the base 1, emitter 2, collector 3, and electrodes 4 and 5, and the center part is the low avalanche voltage element region of NPN trilayer constitution having the junction depth of Xb, thickness of layer 1 as Wb, and junction depth Wb. The circumference part is the high avalanche voltage element region of NPN trilayer constitution having the junction depth Xa, thickness of layer 1 as Wa and the junction depth of Ya. When the transistor junction exceeds the voltage Vd causing avalanche, for the part B with the voltage increased, the carrier in the layer 1B is increased and it is fed to the layer 1A (iD). The iD promotes the switching of transistor of the part A. Thus, the operation of power supply interruption can be made quickly, and the power consumption in the semiconductor is remarkably small. Accordingly, the rated value of the protected device can be made lower near the operation voltage of the protective unit.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP913178A JPS6056315B2 (en) | 1978-01-30 | 1978-01-30 | Semiconductor overload protection device |
US06/007,819 US4262295A (en) | 1978-01-30 | 1979-01-30 | Semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP913178A JPS6056315B2 (en) | 1978-01-30 | 1978-01-30 | Semiconductor overload protection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54102881A true JPS54102881A (en) | 1979-08-13 |
JPS6056315B2 JPS6056315B2 (en) | 1985-12-09 |
Family
ID=11712066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP913178A Expired JPS6056315B2 (en) | 1978-01-30 | 1978-01-30 | Semiconductor overload protection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6056315B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07313423A (en) * | 1994-05-24 | 1995-12-05 | Yoshiyuki Fujita | Dustpan and filth containing bag used therefor |
-
1978
- 1978-01-30 JP JP913178A patent/JPS6056315B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6056315B2 (en) | 1985-12-09 |
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