JPS5771180A - Input protective circuit device - Google Patents

Input protective circuit device

Info

Publication number
JPS5771180A
JPS5771180A JP55146955A JP14695580A JPS5771180A JP S5771180 A JPS5771180 A JP S5771180A JP 55146955 A JP55146955 A JP 55146955A JP 14695580 A JP14695580 A JP 14695580A JP S5771180 A JPS5771180 A JP S5771180A
Authority
JP
Japan
Prior art keywords
regions
type
substrate
region
protective circuit
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
Application number
JP55146955A
Other languages
Japanese (ja)
Inventor
Noburo Tanimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55146955A priority Critical patent/JPS5771180A/en
Publication of JPS5771180A publication Critical patent/JPS5771180A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D89/00—Aspects of integrated devices not covered by groups H10D84/00 - H10D88/00
    • H10D89/60—Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
    • H10D89/601—Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD] for devices having insulated gate electrodes, e.g. for IGFETs or IGBTs
    • H10D89/811—Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD] for devices having insulated gate electrodes, e.g. for IGFETs or IGBTs using FETs as protective elements

Landscapes

  • Amplifiers (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
  • Protection Of Static Devices (AREA)

Abstract

PURPOSE:To ensure operation even when high integration is contrived by a method wherein an input protective circuit for C-MOS is composed by utilizing an element with a low voltage. CONSTITUTION:A pair of P type well regions 2 and 2' are penetrated in an N type Si substrate 1 in the depth direction and formed by splitting in the right and left directions through a vacant section having sufficiently narrow width, and an N<+> type region 3 is formed by diffusion at the circumference of opposing well regions 2 and 2', extending over the vacant section 6. Next, thick SiO2 films 5 are deposited on the whole surface, the end sections on the regions 3, 2 and 2' are removed, and P<+> type regions 4 and 4' are formed by diffusion in the exposed regions 2 and 2' respectively. In this way composition, input is connected to the region 3 through a resistor and the regions 2 and 2' are connected to a low electrical potential through the regions 4 and 4' and the substrate 1 is connected to a high electrical potential. In this way, a J-FET is produced by composing junction-type diodes between the regions 3 and 2, and 3 and 2', the region 2 as a drain the substrate 1 as a source and regions 2 and 2' as gates and these are connected in parallel.
JP55146955A 1980-10-22 1980-10-22 Input protective circuit device Pending JPS5771180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55146955A JPS5771180A (en) 1980-10-22 1980-10-22 Input protective circuit device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55146955A JPS5771180A (en) 1980-10-22 1980-10-22 Input protective circuit device

Publications (1)

Publication Number Publication Date
JPS5771180A true JPS5771180A (en) 1982-05-01

Family

ID=15419350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55146955A Pending JPS5771180A (en) 1980-10-22 1980-10-22 Input protective circuit device

Country Status (1)

Country Link
JP (1) JPS5771180A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61162143U (en) * 1985-03-29 1986-10-07
US5027181A (en) * 1989-06-08 1991-06-25 Siemens Aktiengesellschaft Circuit configuration for protecting an electronic circuit against overload

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61162143U (en) * 1985-03-29 1986-10-07
US5027181A (en) * 1989-06-08 1991-06-25 Siemens Aktiengesellschaft Circuit configuration for protecting an electronic circuit against overload

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