CN103200768A - Circuit board for reducing carbon oil key contact resistance and circuit board printing method - Google Patents
Circuit board for reducing carbon oil key contact resistance and circuit board printing method Download PDFInfo
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- CN103200768A CN103200768A CN2013101064468A CN201310106446A CN103200768A CN 103200768 A CN103200768 A CN 103200768A CN 2013101064468 A CN2013101064468 A CN 2013101064468A CN 201310106446 A CN201310106446 A CN 201310106446A CN 103200768 A CN103200768 A CN 103200768A
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- carbon oil
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- contact resistance
- wiring board
- circuit board
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Abstract
The invention discloses a circuit board for reducing carbon oil key contact resistance and a circuit board printing method. The circuit board comprises a welding plate arranged on a circuit board key position and comprising copper foil, and carbon oil printed on the welding plate, wherein an insulating layer does not exist between the carbon oil and the welding plate. The circuit board can effectively reduce the contact resistance of a carbon oil key, effectively identifies operation of users, prolongs the service life of the key, and promotes usage experience of the users.
Description
Technical field
The present invention relates to wiring board and resistor technical field, relate in particular to a kind of wiring board and wiring board printing method that reduces carbon oil button contact resistance.
Background technology
Fig. 1 has provided the schematic cross-section of carbon oil button wiring board in the prior art, carbon oil button wiring board has mainly been printed one deck carbon oil 101 at the wiring board key position, form the carbon oil finger structure, and the carbon oil button is made up of carbon oil finger structure and top carbon granules silica gel push-button all generally.Carbon oil can conduct electricity, and has wear-resistant and etch-proof effect.
The remote controller of present nearly all household electrical appliances all uses the carbon oil button, but the contact resistance of carbon oil button is generally all bigger, probably arrives between hundreds of ohm 100, influences the sensitivity of button and user's experience.Under the normal condition, the carbon oil button can satisfy the demands, but the contact resistance of carbon oil button can become greatly under following three kinds of situations, causes user's invalid operation easily:
1, when user's dynamics that pushes button not enough, button is failed fully by on earth, at this moment the contact resistance of button will become greatly, is not identified easily;
2, press (button has only on one side or the part contact) when inclined to one side when the user has pushed button, at this moment the contact resistance of button also can become greatly, is not identified easily;
3, after the equipment that uses the carbon oil button used a period of time, button and carbon oil all can wear and tear to some extent, and at this moment the contact resistance of button also can become greatly, is not identified easily when pushing button.
Summary of the invention
The objective of the invention is to the wiring board and the wiring board printing method that reduce carbon oil button contact resistance by a kind of, by at the wiring board key position pad being set, print carbon oil at described pad then, reduce the contact resistance of carbon oil button, solve the problem that above background technology is partly mentioned.
For reaching this purpose, the present invention by the following technical solutions:
A kind of wiring board that reduces carbon oil button contact resistance, described wiring board comprises:
Be arranged at the pad of described wiring board key position, described pad comprises Copper Foil;
Be printed on the carbon oil on the described pad, do not have insulating barrier between described carbon oil and the described pad.
Further, described carbon oil covers described pad and described carbon oil contacts fully with described pad fully.
Further, the width of described pad is the 1/2-2/3 of described carbon oil width, and described pad is in the centre position of described carbon oil.
Accordingly, the invention allows for a kind of wiring board printing method that reduces carbon oil button contact resistance, described printing method comprises:
At described wiring board key position pad is set, described pad comprises Copper Foil;
Print carbon oil at described pad, do not have insulating barrier between described carbon oil and the described pad.
Further, described carbon oil covers described pad and described carbon oil contacts fully with described pad fully.
Further, the width of described pad is the 1/2-2/3 of described carbon oil width, and described pad is in the centre position of described carbon oil.
The wiring board that reduces carbon oil button contact resistance and wiring board printing method that the present invention proposes have following characteristics: by being arranged at the pad of wiring board key position, and be printed on carbon oil on the described pad, effectively reduced the contact resistance of carbon oil button, user's button operation can be effectively identified, and the useful life of button can be effectively prolonged.
Description of drawings
Fig. 1 is the schematic cross-section of wiring board of the carbon oil button of prior art;
Fig. 2 is the schematic cross-section according to the wiring board that reduces carbon oil button contact resistance of first embodiment of the invention.
Fig. 3 is the flow chart according to the wiring board printing method that reduces carbon oil button contact resistance of second embodiment of the invention;
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.Be understandable that specific embodiment described herein only is used for explaining the present invention, but not limitation of the invention.Also need to prove in addition, for convenience of description, only show part related to the present invention in the accompanying drawing but not full content.
Figure 2 illustrates the first embodiment of the present invention.
Fig. 2 is a kind of schematic cross-section that reduces the wiring board of carbon oil button contact resistance according to first embodiment of the invention.
As described in Figure 2, the described wiring board 200 that reduces carbon oil button contact resistance of present embodiment comprises: be arranged at the pad 201 of described wiring board key position, be printed on the carbon oil 202 on the described pad.
Wherein, described pad 201 comprises Copper Foil.Because the electric conductivity of copper is good, its resistance is lower with respect to carbon oil, can effectively reduce the contact resistance of carbon oil button.But pad is ingress of air directly, also need print carbon oil at pad, prevents that pad is oxidized.
Described carbon oil button is made up of carbon oil finger structure and carbon granules silica gel push-button.Because carbon oil stable performance, cheap, use very extensively (as: remote controller key adopt be exactly the carbon oil button).But the contact resistance of carbon oil button is bigger, can not correctly identify user's operation sometimes, causes invalid operation.
The contact resistance of described carbon oil button is determined by the contact area of carbon oil and carbon granules silica gel, the resistance of carbon oil is every square centimeter about 25 ohm generally speaking, and button is generally all smaller, its area probably is 0.25 square centimeter, its contact resistance will reach about 125 ohm when button is pressed like this, contact resistance is bigger, when contact resistance surpasses certain value, just causes invalid operation easily.For example: in remote control circuitry, when the resistance of scanning circuit surpasses 200 ohm, will cause invalid operation, that is to say the instruction of pressing remote controller key, but not action of machine.
And after being provided with pad, the contact resistance of carbon oil button is determined by pad, carbon oil and carbon granules silica gel, and the electric conductivity of copper obviously is better than carbon oil, and therefore the contact resistance that pad can effectively reduce the carbon oil button is set.
In the present embodiment, there is not insulating barrier between described carbon oil 202 and the described pad 201.The carbon oil stable performance prints carbon oil at described pad and can prevent that pad is oxidized, and designed the contact resistance that pad effectively reduces the carbon oil button, also kept the premium properties of carbon oil button.
In a preferred implementation of present embodiment, the carbon oil of printing covers the pad of setting fully, and described carbon oil contacts fully with described pad.
In a preferred implementation of present embodiment, the width of described pad is the 1/2-2/3 of described carbon oil width, and described pad is in the centre position of described carbon oil.
Present embodiment is by the pad that is arranged at the wiring board key position and the wiring board that is printed on the carbon oil composition on the described pad, effectively reduce the contact resistance of carbon oil button, the equipment of use carbon oil button can effectively be identified user's operation, improve user's experience, and effectively prolonged the useful life of this device keys.
Fig. 3 shows the second embodiment of the present invention.
Fig. 3 is that details are as follows for this realization flow 300 according to the realization flow 300 of the wiring board printing method that reduces carbon oil button contact resistance of second embodiment of the invention:
In step 301, at described wiring board key position pad is set.
In first embodiment, before the printing carbon oil, at first at described wiring board key position pad is set, described pad is made up of Copper Foil.Because the electric conductivity of copper is good, its resistance is lower with respect to carbon oil, can effectively reduce the contact resistance of carbon oil button.But pad is ingress of air directly, also need print carbon oil at pad, prevents that pad is oxidized.
In step 302, print carbon oil at described pad.
In first embodiment, print carbon oil at described pad, there is not insulating barrier between described carbon oil and the described pad.The carbon oil stable performance is printed carbon oil at described pad and can be prevented that pad is oxidized, and is provided with the contact resistance that pad effectively reduces the carbon oil button, has also kept the premium properties of carbon oil button.
In a preferred implementation of present embodiment, the carbon oil of printing covers the pad of setting fully, and described carbon oil contacts fully with described pad.
In a preferred implementation of present embodiment, the width of described pad is the 1/2-2/3 of described carbon oil width, and described pad is in the centre position of described carbon oil.
Present embodiment is by at first arranging pad at the wiring board key position, and then print carbon oil at described pad, reduced the contact resistance of carbon oil button, the equipment of use carbon oil button can effectively be identified user's operation, improve user's experience, and effectively prolonged the useful life of this device keys.
Notice that above-mentioned only is preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that to the invention is not restricted to specific embodiment described here, can carry out various obvious variation for a person skilled in the art, readjust and substitute and can not break away from protection scope of the present invention.Therefore, though carried out comparatively detailed explanation by the present invention of above embodiment, the present invention is not limited only to above embodiment, under the situation that does not break away from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (6)
1. a wiring board that reduces carbon oil button contact resistance is characterized in that, described wiring board comprises:
Be arranged at the pad of described wiring board key position, described pad comprises Copper Foil;
Be printed on the carbon oil on the described pad, do not have insulating barrier between described carbon oil and the described pad.
2. the wiring board that reduces carbon oil button contact resistance according to claim 1 is characterized in that, described carbon oil covers described pad fully and described carbon oil contacts fully with described pad.
3. the wiring board that reduces carbon oil button contact resistance according to claim 1 and 2 is characterized in that, the width of described pad is the 1/2-2/3 of described carbon oil width, and described pad is in the centre position of described carbon oil.
4. wiring board printing method that reduces carbon oil button contact resistance is characterized in that described printing method comprises:
At described wiring board key position pad is set, described pad comprises Copper Foil;
Print carbon oil at described pad, do not have insulating barrier between described carbon oil and the described pad.
5. the wiring board printing method that reduces carbon oil button contact resistance according to claim 4 is characterized in that, described carbon oil covers described pad fully and described carbon oil contacts fully with described pad.
6. according to claim 4 or the 5 described wiring board printing methods that reduce carbon oil button contact resistance, it is characterized in that the width of described pad is the 1/2-2/3 of described carbon oil width, and described pad is in the centre position of described carbon oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106446.8A CN103200768B (en) | 2013-03-28 | 2013-03-28 | A kind of wiring board and wiring board printing method reducing carbon oil key contact resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106446.8A CN103200768B (en) | 2013-03-28 | 2013-03-28 | A kind of wiring board and wiring board printing method reducing carbon oil key contact resistance |
Publications (2)
| Publication Number | Publication Date |
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| CN103200768A true CN103200768A (en) | 2013-07-10 |
| CN103200768B CN103200768B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310106446.8A Active CN103200768B (en) | 2013-03-28 | 2013-03-28 | A kind of wiring board and wiring board printing method reducing carbon oil key contact resistance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105163508A (en) * | 2015-08-13 | 2015-12-16 | 恩达电路(深圳)有限公司 | Production method of long-life anti-friction carbon oil circuit board |
| CN107155263A (en) * | 2017-07-07 | 2017-09-12 | 广东小天才科技有限公司 | LDS circuit board and processing method and device thereof |
| CN109548307A (en) * | 2018-12-21 | 2019-03-29 | 遂宁市广天电子有限公司 | A kind of carbon oil plate and preparation method thereof |
| CN110769588A (en) * | 2019-10-25 | 2020-02-07 | 杭州友成电子有限公司 | PCB carbon film board with copper added at film bottom for enhancing electric conduction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4732821A (en) * | 1986-01-30 | 1988-03-22 | American Telephone And Telegraph Company, At&T Bell Laboratories | Nickel-based electrical contact |
| CN101465391A (en) * | 2007-12-21 | 2009-06-24 | 帕洛阿尔托研究中心公司 | Metallization contact structures and methods for forming multiple-layer electrode structures for silicon solar cells |
| CN201846329U (en) * | 2010-09-10 | 2011-05-25 | 江苏惠通集团有限责任公司 | Electrically conductive ink approach induction press key |
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2013
- 2013-03-28 CN CN201310106446.8A patent/CN103200768B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4732821A (en) * | 1986-01-30 | 1988-03-22 | American Telephone And Telegraph Company, At&T Bell Laboratories | Nickel-based electrical contact |
| CN101465391A (en) * | 2007-12-21 | 2009-06-24 | 帕洛阿尔托研究中心公司 | Metallization contact structures and methods for forming multiple-layer electrode structures for silicon solar cells |
| CN201846329U (en) * | 2010-09-10 | 2011-05-25 | 江苏惠通集团有限责任公司 | Electrically conductive ink approach induction press key |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105163508A (en) * | 2015-08-13 | 2015-12-16 | 恩达电路(深圳)有限公司 | Production method of long-life anti-friction carbon oil circuit board |
| CN105163508B (en) * | 2015-08-13 | 2018-08-10 | 恩达电路(深圳)有限公司 | Long-life rub resistance carbon oil method for producing circuit board |
| CN107155263A (en) * | 2017-07-07 | 2017-09-12 | 广东小天才科技有限公司 | LDS circuit board and processing method and device thereof |
| CN107155263B (en) * | 2017-07-07 | 2019-09-27 | 广东小天才科技有限公司 | LDS circuit board and processing method and device thereof |
| CN109548307A (en) * | 2018-12-21 | 2019-03-29 | 遂宁市广天电子有限公司 | A kind of carbon oil plate and preparation method thereof |
| CN110769588A (en) * | 2019-10-25 | 2020-02-07 | 杭州友成电子有限公司 | PCB carbon film board with copper added at film bottom for enhancing electric conduction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103200768B (en) | 2015-12-09 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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