EP0242902A3 - Protection device - Google Patents

Protection device Download PDF

Info

Publication number
EP0242902A3
EP0242902A3 EP87200556A EP87200556A EP0242902A3 EP 0242902 A3 EP0242902 A3 EP 0242902A3 EP 87200556 A EP87200556 A EP 87200556A EP 87200556 A EP87200556 A EP 87200556A EP 0242902 A3 EP0242902 A3 EP 0242902A3
Authority
EP
European Patent Office
Prior art keywords
electrodes
switching element
resistance state
indium
switching
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.)
Withdrawn
Application number
EP87200556A
Other languages
German (de)
French (fr)
Other versions
EP0242902A2 (en
Inventor
Christopher John Porter
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.)
Raychem Ltd
Original Assignee
Raychem 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
Priority claimed from ES553479A external-priority patent/ES8900238A1/en
Priority claimed from GB868607719A external-priority patent/GB8607719D0/en
Application filed by Raychem Ltd filed Critical Raychem Ltd
Publication of EP0242902A2 publication Critical patent/EP0242902A2/en
Publication of EP0242902A3 publication Critical patent/EP0242902A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/102—Varistor boundary, e.g. surface layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/1013—Thin film varistors

Abstract

A threshold switching device for protecting an electrical circuit from an overvoltage comprises a switching element formed from a chalcogenide glass and a pair of electrodes that are in contact with the com­ position. When the circuit experiences an overvoltage transient, the switching element will switch to its low resistance state to pass the electrical current to ground and then revert to its high resistance state.
The switching element includes an indium layer or an indium containing layer between the switching ele­ ment and at least one, preferably both electrodes. The presence of the indium layers improves the adhesion of the electrodes and/or reduces the electrical contact resistance between the chalcogenide glass and the electrodes and thereby increases the amount of electri­ cal energy that may be passed through the device during a voltage transient before the device latches in its low resistance state.
EP87200556A 1986-03-26 1987-03-24 Protection device Withdrawn EP0242902A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ES553479A ES8900238A1 (en) 1985-03-29 1986-03-26 Circuit protection device
ES553479 1986-03-26
GB868607719A GB8607719D0 (en) 1986-03-27 1986-03-27 Circuit protection device
GB8607719 1986-03-27

Publications (2)

Publication Number Publication Date
EP0242902A2 EP0242902A2 (en) 1987-10-28
EP0242902A3 true EP0242902A3 (en) 1988-08-31

Family

ID=26156147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200556A Withdrawn EP0242902A3 (en) 1986-03-26 1987-03-24 Protection device

Country Status (1)

Country Link
EP (1) EP0242902A3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5668521A (en) * 1995-03-22 1997-09-16 Littelfuse, Inc. Three piece female blade fuse assembly having fuse link terminal with a clip receiving portion
US5663861A (en) * 1995-06-07 1997-09-02 Littelfuse, Inc. Resettable automotive circuit protection device
US5945903A (en) * 1995-06-07 1999-08-31 Littelfuse, Inc. Resettable automotive circuit protection device with female terminals and PTC element
US5694054A (en) * 1995-11-28 1997-12-02 Energy Conversion Devices, Inc. Integrated drivers for flat panel displays employing chalcogenide logic elements
US6813178B2 (en) 2003-03-12 2004-11-02 Micron Technology, Inc. Chalcogenide glass constant current device, and its method of fabrication and operation
CN102751319B (en) * 2012-07-04 2015-04-15 中国科学院上海微系统与信息技术研究所 Chalcogenide compound-based surge protection device and preparation method thereof
US10374009B1 (en) * 2018-07-17 2019-08-06 Macronix International Co., Ltd. Te-free AsSeGe chalcogenides for selector devices and memory devices using same
CN109473411B (en) * 2018-09-17 2021-08-20 上海音特电子有限公司 Thin film material for integrated circuit input/output pin overvoltage protection and use method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271591A (en) * 1963-09-20 1966-09-06 Energy Conversion Devices Inc Symmetrical current controlling device
DE1437387A1 (en) * 1964-07-03 1968-11-28 Danfoss As Overvoltage protection device on telephone network lines
DE1614272A1 (en) * 1966-08-17 1970-02-26 Philips Nv A semiconductor device comprising at least one on an A?, B? attached contact and method of making such a device
US3852517A (en) * 1972-06-12 1974-12-03 Raychem Corp Conductive insert for heat recoverable electrical connector
US3983076A (en) * 1973-07-02 1976-09-28 Energy Conversion Devices, Inc. N-type amorphous semiconductor materials
US3993394A (en) * 1974-07-31 1976-11-23 Raychem Corporation Connector half having connector wafer retained therein
EP0198624A1 (en) * 1985-03-29 1986-10-22 Raychem Limited Overvoltage protection device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271591A (en) * 1963-09-20 1966-09-06 Energy Conversion Devices Inc Symmetrical current controlling device
DE1437387A1 (en) * 1964-07-03 1968-11-28 Danfoss As Overvoltage protection device on telephone network lines
DE1614272A1 (en) * 1966-08-17 1970-02-26 Philips Nv A semiconductor device comprising at least one on an A?, B? attached contact and method of making such a device
US3852517A (en) * 1972-06-12 1974-12-03 Raychem Corp Conductive insert for heat recoverable electrical connector
US3983076A (en) * 1973-07-02 1976-09-28 Energy Conversion Devices, Inc. N-type amorphous semiconductor materials
US3993394A (en) * 1974-07-31 1976-11-23 Raychem Corporation Connector half having connector wafer retained therein
EP0198624A1 (en) * 1985-03-29 1986-10-22 Raychem Limited Overvoltage protection device

Also Published As

Publication number Publication date
EP0242902A2 (en) 1987-10-28

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Legal Events

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18D Application deemed to be withdrawn

Effective date: 19901218

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PORTER, CHRISTOPHER JOHN