GB1361704A - Metal oxide varistor - Google Patents
Metal oxide varistorInfo
- Publication number
- GB1361704A GB1361704A GB4503772A GB4503772A GB1361704A GB 1361704 A GB1361704 A GB 1361704A GB 4503772 A GB4503772 A GB 4503772A GB 4503772 A GB4503772 A GB 4503772A GB 1361704 A GB1361704 A GB 1361704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- substrate
- nitride
- thermal conductivity
- high thermal
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
-
- 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)
- Details Of Resistors (AREA)
Abstract
1361704 Varistors GENERAL ELECTRIC CO 29 Sept 1972 [1 Oct 1971] 45037/72 Heading H1K A varistor assembly 10 (Fig. 3) comprises a metal oxide substrate 11 having opposed major surfaces 12, 13 and α>10 for current density 10<SP>-3</SP> to 10<SP>2</SP> A/cm<SP>2</SP> in the characteristic I = (V/(C)<SP>α</SP> where I current, V = voltage, and C is a constant. Electrodes 14, 15 ohmically contact surfaces 12, 13 and have attached leads 16, 17. High thermal conductivity spaced plates 19, 20 of, e.g. Cu parallel to the surfaces are bonded together by potting compound 18 enclosing the varistor substrate and its electrodes for heat dissipation, and the compound contains high thermal conductivity insulant material, e.g. boron nitride, beryllium nitride or oxide, aluminium nitride and an epoxy resin. The substrate material is polycrystalline material of, e.g. zinc oxide with a small proportion of bismuth, aluminium, iron, magnesium or calcium oxides sintered together and pressed into shape. One of the spaced plates may be drilled for mounting, and in a modification (Fig. 4, not shown) the leads may be planar extensions of the electrodes.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18572371A | 1971-10-01 | 1971-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1361704A true GB1361704A (en) | 1974-07-30 |
Family
ID=22682213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4503772A Expired GB1361704A (en) | 1971-10-01 | 1972-09-29 | Metal oxide varistor |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5443700B2 (en) |
DE (1) | DE2248159C2 (en) |
FR (1) | FR2156651B1 (en) |
GB (1) | GB1361704A (en) |
IE (1) | IE36727B1 (en) |
SE (1) | SE381947B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5217022A (en) * | 1975-07-30 | 1977-02-08 | Fuji Xerox Co Ltd | Developer for electrostatic printing |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE472109C (en) * | 1922-02-11 | 1929-02-25 | Siemens Schuckertwerke Akt Ges | Lightning arrester, consisting of a plurality of flat bodies or discs with surfaces in contact with one another, one on top of the other |
DE635491C (en) * | 1933-07-25 | 1936-09-18 | Aeg | Resistor for surge arresters composed of conductive materials and binding agents |
US2501322A (en) * | 1946-11-07 | 1950-03-21 | Westinghouse Electric Corp | Moisture-resistant lightning arrester valve block |
NL192214A (en) * | 1954-01-21 | |||
DE1110311B (en) * | 1954-02-27 | 1961-07-06 | Siemens Ag | Electrical components built into the housing and protected against moisture by being embedded in a casting compound |
NL217849A (en) * | 1956-06-12 | |||
FR1379676A (en) * | 1962-11-09 | 1964-11-27 | Philco Corp | Further training in semiconductor devices |
US3278813A (en) * | 1964-04-22 | 1966-10-11 | Gen Electric | Transistor housing containing packed, earthy, nonmetallic, electrically insulating material |
CA831691A (en) * | 1967-10-09 | 1970-01-06 | Matsuoka Michio | Non-linear resistors of bulk type |
-
1972
- 1972-09-29 IE IE132572A patent/IE36727B1/en unknown
- 1972-09-29 JP JP9723072A patent/JPS5443700B2/ja not_active Expired
- 1972-09-29 SE SE1264172A patent/SE381947B/en unknown
- 1972-09-29 GB GB4503772A patent/GB1361704A/en not_active Expired
- 1972-09-29 FR FR7234495A patent/FR2156651B1/fr not_active Expired
- 1972-09-30 DE DE19722248159 patent/DE2248159C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2248159A1 (en) | 1973-04-19 |
FR2156651B1 (en) | 1977-08-26 |
DE2248159C2 (en) | 1983-03-17 |
IE36727L (en) | 1973-04-01 |
JPS4843154A (en) | 1973-06-22 |
SE381947B (en) | 1975-12-22 |
FR2156651A1 (en) | 1973-06-01 |
IE36727B1 (en) | 1977-02-02 |
JPS5443700B2 (en) | 1979-12-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1484608A (en) | Semiconductor device | |
GB1457036A (en) | Resistors | |
NL6810761A (en) | ||
GB1264055A (en) | Semiconductor device | |
GB1444722A (en) | Electrical heating elements | |
GB1361704A (en) | Metal oxide varistor | |
US3771091A (en) | Potted metal oxide varistor | |
GB1182707A (en) | Semiconductor Rectifier Circuit Assembly | |
GB1033813A (en) | Electrical semiconductor device | |
ES345338A1 (en) | Electrical generator | |
GB883862A (en) | Improvements relating to semi-conductor rectifiers | |
GB971703A (en) | A semiconductor device | |
GB1360358A (en) | Commutators | |
GB1135631A (en) | Electrode means for mhd devices | |
ES352935A1 (en) | Wire-Wound Power Resistor | |
GB1266706A (en) | ||
GB1362499A (en) | Semiconductor devices | |
Itskovich et al. | Nonequilibrium phonons in conducting point contacts. | |
JPS6490501A (en) | Voltage dependent nonlinear element | |
JPH0337310B2 (en) | ||
JPS5752154A (en) | Cooler for semiconductor | |
SU528290A1 (en) | Electrically conductive ceramic material | |
GB1362113A (en) | Semiconductor devices | |
GB982193A (en) | Improvements in or relating to semiconductor devices | |
JPS57164541A (en) | Electric device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |