ATE34482T1 - VARISTOR IN CHIP CONSTRUCTION FOR USE IN PRINTED CIRCUITS AND METHOD FOR ITS MANUFACTURE. - Google Patents

VARISTOR IN CHIP CONSTRUCTION FOR USE IN PRINTED CIRCUITS AND METHOD FOR ITS MANUFACTURE.

Info

Publication number
ATE34482T1
ATE34482T1 AT85109001T AT85109001T ATE34482T1 AT E34482 T1 ATE34482 T1 AT E34482T1 AT 85109001 T AT85109001 T AT 85109001T AT 85109001 T AT85109001 T AT 85109001T AT E34482 T1 ATE34482 T1 AT E34482T1
Authority
AT
Austria
Prior art keywords
parts
ceramic body
metal coatings
varistor
recess
Prior art date
Application number
AT85109001T
Other languages
German (de)
Inventor
Guenter Dipl-Ing Ott
Original Assignee
Siemens Bauelemente Ohg
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 Siemens Bauelemente Ohg filed Critical Siemens Bauelemente Ohg
Application granted granted Critical
Publication of ATE34482T1 publication Critical patent/ATE34482T1/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)

Abstract

1. A chip varistor for use in printed circuits (GS) for installation on conductor path contact surfaces (10, 11) of a printed circuit board (12), consisting of a parallelepiped-shaped ceramic body (20) of varistor material which is provided on oppositely disposed surfaces with solderable metal coatings (23, 24) as electrodes which extend at least on to that surface of the ceramic body (20) which faces towards the printed circuit board (12), characterized in that, at least on its side facing towards the printed circuit board (12), the ceramic body (20) is provided with a recess (25, 26) which forms two lateral parts (27, 28, 31, 32), that parts (35, 36, 37, 38) of the metal coatings (23, 24) extend to the end faces (29, 30, 33, 34) of the lateral parts (27, 28, 31, 32), and that the width and depth of the recess (25, 26) are such that the current path (41) along the surface parts of the recess (25, 26) between the ends (39, 40) of the parts (35, 36, 37, 38) of the metal coatings on the end faces (29, 30, 33, 34) of the lateral parts (27, 28, 31, 32) is longer than the lateral spacing (42) between the metal coatings (23, 24), which corresponds to the thickness of the ceramic body (20).
AT85109001T 1984-07-31 1985-07-18 VARISTOR IN CHIP CONSTRUCTION FOR USE IN PRINTED CIRCUITS AND METHOD FOR ITS MANUFACTURE. ATE34482T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3428242 1984-07-31
EP85109001A EP0171642B1 (en) 1984-07-31 1985-07-18 Chip varistor for use in printed circits, and method of producing it

Publications (1)

Publication Number Publication Date
ATE34482T1 true ATE34482T1 (en) 1988-06-15

Family

ID=6242037

Family Applications (1)

Application Number Title Priority Date Filing Date
AT85109001T ATE34482T1 (en) 1984-07-31 1985-07-18 VARISTOR IN CHIP CONSTRUCTION FOR USE IN PRINTED CIRCUITS AND METHOD FOR ITS MANUFACTURE.

Country Status (3)

Country Link
EP (1) EP0171642B1 (en)
AT (1) ATE34482T1 (en)
DE (1) DE3562835D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3445698A1 (en) * 1984-12-14 1986-06-26 C. Conradty Nürnberg GmbH & Co KG, 8505 Röthenbach CHIP VARISTOR AND METHOD FOR THE PRODUCTION THEREOF
NL8800156A (en) * 1988-01-25 1989-08-16 Philips Nv CHIP RESISTOR AND METHOD FOR MANUFACTURING A CHIP RESISTOR.
US5287083A (en) * 1992-03-30 1994-02-15 Dale Electronics, Inc. Bulk metal chip resistor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364021A (en) * 1977-10-07 1982-12-14 General Electric Company Low voltage varistor configuration
US4157527A (en) * 1977-10-20 1979-06-05 General Electric Company Polycrystalline varistors with reduced overshoot
DE3277042D1 (en) * 1981-02-13 1987-09-24 Gen Electric Zinc oxide varistor with reduced fringe current effects
FR2513032B1 (en) * 1981-09-14 1985-12-13 Carreras Michelle INTEGRATED PROTECTION AGAINST OVERVOLTAGES OF AN ELECTRONIC CIRCUIT, AND ELECTRONIC CIRCUIT PROTECTED BY THIS DEVICE
US4451815A (en) * 1982-09-27 1984-05-29 General Electric Company Zinc oxide varistor having reduced edge current density

Also Published As

Publication number Publication date
EP0171642B1 (en) 1988-05-18
EP0171642A1 (en) 1986-02-19
DE3562835D1 (en) 1988-06-23

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