CN103971867A - Anti-overheating thick-film resistor - Google Patents
Anti-overheating thick-film resistor Download PDFInfo
- Publication number
- CN103971867A CN103971867A CN201410224784.6A CN201410224784A CN103971867A CN 103971867 A CN103971867 A CN 103971867A CN 201410224784 A CN201410224784 A CN 201410224784A CN 103971867 A CN103971867 A CN 103971867A
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- conductive film
- film layer
- thick
- insulating body
- resistor
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Abstract
The invention discloses an anti-overheating thick-film resistor. The anti-overheating thick-film resistor comprises an insulating base body and a conductive film layer evaporated on the surface of the insulating base body, wherein at least one pair of cut groove groups are formed in the conductive film layer in the length direction, each group of cut groove groups comprises two L-shaped cut grooves formed symmetrically, one end of the conductive film layer is shorter than the insulating base body, so that the insulating base body is partially exposed, the other end of the conductive film layer is of an arc shape, and the end part of the conductive film layer is leveled with the insulating base body; at least one pair of L-shaped cut grooves are formed in the conductive film layer to effectively dissipate heat and prevent the burning of the resistor due to local overheating; one end of the conductive film layer is designed to be the arc shape, the volume of the resistor is reduced and the using amount of a film material is reduced under a condition that the resistor performances are ensured; the heat-dissipating groove is formed in a zone with an equivalent width and a heat-dissipating copper bar with the skillful structure is adopted to further improve the heat dissipating performance; the conductive film layer is 10-20 micrometers in thickness and is less than the insulating base body in thickness, and the structural stability and the structural reliability of the resistor are ensured.
Description
Technical field
The present invention relates to a kind of resistance, be specifically related to a kind of anti-overheated thick-film resistor, belong to electronic devices and components field.
Background technology
Film resistance refers to and adopts the method for class evaporation that the material evaporation of certain resistivity is made in insulating material surface, can be divided into film resistor and thick-film resistor according to the thickness of plated film, have advantages of that volume is little, good reliability, can be widely used in various electronic circuits.
In general, can form a grooving and be used for adjusting resistance in film resistance, at grooving place, the effective width of resistance reduces, and resistance number formulary increases, thereby makes resistance increase, and realizes regulating resistance.This problem of bringing is: when resistance energising, electric current can be walked around grooving and pass through from effective width region, and so, the power in effective width region will be high, causes the heating in this region apparently higher than other places, is more prone to burn out because local overheating causes resistance.
Summary of the invention
A kind ofly can prevent local overheating for solving the deficiencies in the prior art, the object of the present invention is to provide, guarantee the thick-film resistor in useful life.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
An anti-overheated thick-film resistor, comprising: insulating body, evaporation, in the conductive film layer on insulating body surface, are formed with at least one pair of grooving group on the length direction of described conductive film layer, every pair of grooving group includes symmetrically arranged two L-type groovings; Thereby one end of described conductive film layer is partly more exposed than the short insulating body that makes of insulating body, the other end is that circular arc and end are concordant with insulating body.
Conductive film layer between two L-type groovings of aforementioned every pair of grooving group is equivalent width district, is formed with several heat radiation grooves in equivalent width district.
In aforementioned heat radiation groove, be provided with heat radiation copper rod, described heat radiation copper rod comprises: with heat radiation groove fit barred body, with the integrated auxiliary heat dissipation bar of barred body, the side face of described barred body is zigzag.
Aforementioned dielectric matrix is made up of ceramic material.
Aforementioned conductive film layer is carbon film or metal film.
The thickness of aforementioned conductive film layer is 10-20 micron and the thickness that is less than insulating body.
Usefulness of the present invention is: a kind of anti-overheated thick-film resistor of the present invention, on conductive film layer, form at least pair of L type grooving, and can make heat effectively disperse, prevent that local overheating from burning out resistance; And conductive film layer one end is arranged to circular arc, guaranteeing, on the basis of the performance of resistance own, to have reduced the volume of resistance, reduce the consumption of membrane material; This external equivalent width district has formed heat radiation groove, also further improves heat dispersion by the structure copper rod that dispels the heat cleverly; Conductive film layer is 10-20 micron and the thickness that is less than insulating body, guarantees that electric resistance structure is stable and reliable.
Brief description of the drawings
Fig. 1 is the structural representation of a preferred embodiment of a kind of anti-overheated thick-film resistor of the present invention.
The implication of Reference numeral in figure: 1, insulating body, 2, conductive film layer, 3, L-type grooving, 4, barred body, 5, auxiliary heat dissipation bar.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done to concrete introduction.
Referring to Fig. 1, a kind of anti-overheated thick-film resistor of the present invention, comprise: insulating body 1 and evaporation are in the conductive film layer 2 on insulating body 1 surface, wherein, insulating body 1 is preferably made up of ceramic material, conductive film layer 2 is preferably carbon film or metal film, and the thickness of conductive film layer 2 is 10-20 micron and the thickness that is less than insulating body 1.Thereby one end of conductive film layer 2 is partly more exposed than the short insulating body 1 that makes of insulating body 1, the other end is that circular arc and end are concordant with insulating body 1, so, is guaranteeing not affect on the basis of the performance of resistance own, reduce the volume of resistance, reduced the consumption of membrane material.
In order to realize adjusting resistance, on the length direction of conductive film layer 2, be formed with at least one pair of grooving group, every pair of grooving group includes symmetrically arranged two L-type groovings 3.Conductive film layer 2 between two L-type groovings 3 is equivalent width district, in the time that electric current arrives grooving group position, will walk around L-type grooving 3, and from equivalent width, district passes through.In traditional resistance, generally to form a larger grooving on one side of conductive film layer 2, this path that just causes electric current to be walked around is longer, loss is larger, and heating is also more concentrated, resistance easily burns out, so, in the present invention, adopt some to grooving group, embodiment in Fig. 1 only has a pair of grooving group, according to resistance trimming needs, can arrange two pairs even three pairs, that is to say, if cannot once resistance be adjusted to target resistance, can pass through repeatedly resistance trimming, incremental mode realizes, certainly, the width in equivalent width district is also along with the needs of resistance trimming gradually change, generally along with sense of current, the width in equivalent width district diminishes gradually.Specifically, once need to repeatedly regulate, can between grooving group embodiment illustrated in fig. 1 (the first grooving group) and circular arc end face, a pair of grooving group be set again, we are referred to as the second grooving group, and the width in the equivalent width district between two groovings of certain the second grooving group is less than the equivalent width district of the first grooving group.
Further, be formed with several heat radiation grooves in equivalent width district, the degree of depth of heat radiation groove is less than the thickness of conductive film layer 2.Further, in heat radiation groove, be provided with heat radiation copper rod to improve heat dispersion, heat radiation copper rod comprise: with heat radiation groove fit barred body 4, with the integrated auxiliary heat dissipation bar 5 of barred body 4, the side face of barred body 4 is that zigzag (not shown) is further to optimize radiating effect.By in heat radiation groove, heat radiation copper rod being set, can ensure that the performance of resistance itself is unaffected, can improve radiating effect by the good heat dispersion of copper rod again simultaneously, achieve many things at one stroke.
More than show and described general principle of the present invention, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (6)
1. an anti-overheated thick-film resistor, it is characterized in that, comprise: insulating body, evaporation, in the conductive film layer on insulating body surface, are formed with at least one pair of grooving group on the length direction of described conductive film layer, every pair of grooving group includes symmetrically arranged two L-type groovings; Thereby one end of described conductive film layer is partly more exposed than the short insulating body that makes of insulating body, the other end is that circular arc and end are concordant with insulating body.
2. a kind of anti-overheated thick-film resistor according to claim 1, is characterized in that, the conductive film layer between two L-type groovings of every pair of grooving group is equivalent width district, is formed with several heat radiation grooves in equivalent width district.
3. a kind of anti-overheated thick-film resistor according to claim 2, it is characterized in that, in described heat radiation groove, be provided with heat radiation copper rod, described heat radiation copper rod comprises: with heat radiation groove fit barred body, with the integrated auxiliary heat dissipation bar of barred body, the side face of described barred body is zigzag.
4. a kind of anti-overheated thick-film resistor according to claim 1, is characterized in that, described insulating body is made up of ceramic material.
5. a kind of anti-overheated thick-film resistor according to claim 1, is characterized in that, described conductive film layer is carbon film or metal film.
6. according to a kind of anti-overheated thick-film resistor described in claim 1-5 any one, it is characterized in that, the thickness of described conductive film layer is 10-20 micron and the thickness that is less than insulating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410224784.6A CN103971867B (en) | 2014-05-27 | A kind of anti-overheated thick-film resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410224784.6A CN103971867B (en) | 2014-05-27 | A kind of anti-overheated thick-film resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103971867A true CN103971867A (en) | 2014-08-06 |
| CN103971867B CN103971867B (en) | 2016-11-30 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677016A (en) * | 1992-08-24 | 1994-03-18 | Koa Corp | Fuse resistor and manufacture thereof |
| JPH06112018A (en) * | 1992-09-26 | 1994-04-22 | Marcon Electron Co Ltd | Thick-film resistor forming method |
| JPH06267705A (en) * | 1993-03-17 | 1994-09-22 | Rohm Co Ltd | Chip resistor |
| JP2001167909A (en) * | 1999-12-14 | 2001-06-22 | Matsushita Electric Ind Co Ltd | Fuse resistor and manufacturing method therefor |
| CN1717754A (en) * | 2003-09-17 | 2006-01-04 | 罗姆股份有限公司 | Chip resistor and method of manufacturing the same |
| CN101243524A (en) * | 2005-08-18 | 2008-08-13 | 罗姆股份有限公司 | Chip resistor |
| CN201749751U (en) * | 2010-07-06 | 2011-02-16 | 广东风华高新科技股份有限公司 | Novel thick film resistor |
| CN202796289U (en) * | 2012-06-25 | 2013-03-13 | 旺诠科技(昆山)有限公司 | Miniature sheet metal resistor |
| JP2013058783A (en) * | 2012-11-14 | 2013-03-28 | Taiyosha Electric Co Ltd | Chip resistor |
| CN203552829U (en) * | 2013-10-10 | 2014-04-16 | 盛雷城精密电阻（江西）有限公司 | Aluminum housing radiating resistor |
| CN203910372U (en) * | 2014-05-27 | 2014-10-29 | 昆山福烨电子有限公司 | Anti-overheated thick-film resistor |
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677016A (en) * | 1992-08-24 | 1994-03-18 | Koa Corp | Fuse resistor and manufacture thereof |
| JPH06112018A (en) * | 1992-09-26 | 1994-04-22 | Marcon Electron Co Ltd | Thick-film resistor forming method |
| JPH06267705A (en) * | 1993-03-17 | 1994-09-22 | Rohm Co Ltd | Chip resistor |
| JP2001167909A (en) * | 1999-12-14 | 2001-06-22 | Matsushita Electric Ind Co Ltd | Fuse resistor and manufacturing method therefor |
| CN1717754A (en) * | 2003-09-17 | 2006-01-04 | 罗姆股份有限公司 | Chip resistor and method of manufacturing the same |
| CN101243524A (en) * | 2005-08-18 | 2008-08-13 | 罗姆股份有限公司 | Chip resistor |
| CN201749751U (en) * | 2010-07-06 | 2011-02-16 | 广东风华高新科技股份有限公司 | Novel thick film resistor |
| CN202796289U (en) * | 2012-06-25 | 2013-03-13 | 旺诠科技(昆山)有限公司 | Miniature sheet metal resistor |
| JP2013058783A (en) * | 2012-11-14 | 2013-03-28 | Taiyosha Electric Co Ltd | Chip resistor |
| CN203552829U (en) * | 2013-10-10 | 2014-04-16 | 盛雷城精密电阻（江西）有限公司 | Aluminum housing radiating resistor |
| CN203910372U (en) * | 2014-05-27 | 2014-10-29 | 昆山福烨电子有限公司 | Anti-overheated thick-film resistor |
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Effective date of registration: 20190109 Address after: 511400 Room 1501, Building 23, Tian'an Headquarters Center, 555 North Panyu Avenue, Donghuan Street, Panyu District, Guangzhou City, Guangdong Province Patentee after: Jianwei Electronic Technology (Guangzhou) Co., Ltd. Address before: 215325 No. 99 Ming Road, Zhouzhuang Town, Kunshan City, Suzhou, Jiangsu. Patentee before: Kunshan Favorstar Electronics Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20210527 |
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| CF01 | Termination of patent right due to non-payment of annual fee |