CN103200768B - A kind of wiring board and wiring board printing method reducing carbon oil key contact resistance - Google Patents
A kind of wiring board and wiring board printing method reducing carbon oil key contact resistance Download PDFInfo
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- CN103200768B CN103200768B CN201310106446.8A CN201310106446A CN103200768B CN 103200768 B CN103200768 B CN 103200768B CN 201310106446 A CN201310106446 A CN 201310106446A CN 103200768 B CN103200768 B CN 103200768B
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- carbon oil
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- contact resistance
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Abstract
The invention discloses a kind of wiring board and the wiring board printing method that reduce carbon oil key contact resistance, described wiring board comprises: the pad being arranged at described wiring board key position, and described pad comprises Copper Foil; Be printed on the carbon oil on described pad, between described carbon oil and described pad, there is not insulating barrier.The present invention can effectively reduce the contact resistance of carbon oil button, effectively identifies the operation of user, extends the useful life of button, promotes the experience of user.
Description
Technical field
The present invention relates to wiring board and resistor technologies field, particularly relate to a kind of wiring board and the wiring board printing method that reduce carbon oil key contact resistance.
Background technology
Fig. 1 gives the schematic cross-section of carbon oil key circuit plate in prior art, carbon oil key circuit plate has mainly printed one deck carbon oil 101 at wiring board key position, form carbon oil finger structure, and carbon oil button is generally all made up of carbon oil finger structure and carbon granules silica gel push-button above.Carbon oil can conduct electricity, and has wear-resistant and etch-proof effect.
The remote controller of current nearly all household electrical appliances all uses carbon oil button, but the contact resistance of carbon oil button is general all larger, probably between 100 to hundreds of ohm, affects the sensitivity of button and the experience of user.Under normal circumstances, carbon oil button can satisfy the demands, but in following three kinds of situations, the contact resistance of carbon oil button can become large, easily causes the invalid operation of user:
1, when user's dynamics that pushes button is inadequate, make button could not completely by earth, at this moment the contact resistance of button will become large, is not easily identified;
2, when user pushed button press inclined time (button only have on one side or part contact), at this moment the contact resistance of button also can become large, is not easily identified;
3, when after the equipment use a period of time using carbon oil button, button and carbon oil all can wear and tear to some extent, and at this moment the contact resistance of button also can become large, is not easily identified when a key is pressed.
Summary of the invention
The object of the invention is to by a kind of wiring board and the wiring board printing method that reduce carbon oil key contact resistance, by arranging pad at wiring board key position, then on described pad, carbon oil is printed, reduce the contact resistance of carbon oil button, solve the problem that above background technology part is mentioned.
For reaching this object, the present invention by the following technical solutions:
Reduce a wiring board for carbon oil key 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 described pad, between described carbon oil and described pad, there is not insulating barrier.
Further, described carbon oil covers described pad and described carbon oil contacts completely with described pad completely.
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 reducing carbon oil key contact resistance, described printing method comprises:
Arrange pad at described wiring board key position, described pad comprises Copper Foil;
Described pad prints carbon oil, between described carbon oil and described pad, there is not insulating barrier.
Further, described carbon oil covers described pad and described carbon oil contacts completely with described pad completely.
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 of the reduction carbon oil key contact resistance that the present invention proposes and wiring board printing method have following features: by being arranged at the pad of wiring board key position, and the carbon oil be printed on described pad, effectively reduce the contact resistance of carbon oil button, effectively can identify the button operation of user, and effectively can extend the useful life of button.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of the wiring board of the carbon oil button of prior art;
Fig. 2 is the schematic cross-section of the wiring board of reduction carbon oil key contact resistance according to a first embodiment of the present invention.
Fig. 3 is the flow chart of the wiring board printing method of reduction carbon oil key contact resistance according to a second embodiment of the present invention;
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in 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 reducing the wiring board of carbon oil key contact resistance according to a first embodiment of the present invention.
As described in Figure 2, the wiring board 200 of the reduction carbon oil key contact resistance described in the present embodiment comprises: the pad 201 being arranged at described wiring board key position, is printed on the carbon oil 202 on described pad.
Wherein, described pad 201 comprises Copper Foil.Because the electric conductivity of copper is good, its resistance is lower relative to carbon oil, effectively can reduce the contact resistance of carbon oil button.But pad can not direct ingress of air, also needs to print carbon oil on pad, prevents pad oxidized.
Described carbon oil button is made up of carbon oil finger structure and carbon granules silica gel push-button.Due to carbon oil stable performance, cheap, use widely (as: remote controller key adopt be exactly carbon oil button).But the contact resistance of carbon oil button is larger, sometimes correctly can not identifies the operation of user, cause invalid operation.
The contact resistance of described carbon oil button is determined by the contact area of carbon oil and carbon granules silica gel, generally the resistance of carbon oil is about 25 ohm every square centimeter, and button is general all smaller, its area is probably 0.25 square centimeter, when button is pressed, its contact resistance will reach 125 ohms like this, contact resistance is comparatively large, when contact resistance exceedes certain value, just easily causes invalid operation.Such as: in remote control circuitry, when the resistance of scanning circuit is more than 200 ohm, will invalid operation be caused, that is have the instruction of pressing remote controller key, but machine not have action.
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 is obviously better than carbon oil, therefore arranges the contact resistance that pad can effectively reduce carbon oil button.
In the present embodiment, there is not insulating barrier between described carbon oil 202 and described pad 201.Carbon oil stable performance, described pad is printed carbon oil pad can be prevented oxidized, and devise the contact resistance that pad effectively reduces carbon oil button, also maintain the premium properties of carbon oil button.
In a preferred implementation of the present embodiment, the carbon oil of printing covers the pad of setting completely, and described carbon oil contacts completely with described pad.
In a preferred implementation of the 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.
The present embodiment is by being arranged at the pad of wiring board key position and being printed on the wiring board of the carbon oil composition on described pad, effectively reduce the contact resistance of carbon oil button, the equipment of use carbon oil button effectively can identify the operation of user, improve Consumer's Experience, and effectively extend the useful life of this device keys.
Fig. 3 shows the second embodiment of the present invention.
Fig. 3 is the realization flow 300 of the wiring board printing method of reduction carbon oil key contact resistance according to a second embodiment of the present invention, and details are as follows for this realization flow 300:
In step 301, pad is set at described wiring board key position.
In a first embodiment, before printing carbon oil, first arrange pad at described wiring board key position, described pad is made up of Copper Foil.Because the electric conductivity of copper is good, its resistance is lower relative to carbon oil, effectively can reduce the contact resistance of carbon oil button.But pad can not direct ingress of air, also needs to print carbon oil on pad, prevents pad oxidized.
In step 302, described pad prints carbon oil.
In a first embodiment, described pad prints carbon oil, between described carbon oil and described pad, there is not insulating barrier.Carbon oil stable performance, described pad is printed carbon oil pad can be prevented oxidized, and be provided with the contact resistance that pad effectively reduces carbon oil button, also maintain the premium properties of carbon oil button.
In a preferred implementation of the present embodiment, the carbon oil of printing covers the pad of setting completely, and described carbon oil contacts completely with described pad.
In a preferred implementation of the 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.
First the present embodiment by arranging pad at wiring board key position, and then carbon oil is printed on described pad, reduce the contact resistance of carbon oil button, the equipment of use carbon oil button effectively can identify the operation of user, improve Consumer's Experience, and effectively extend the useful life of this device keys.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (4)
1. reduce a wiring board for carbon oil key contact resistance, it 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 described pad, between described carbon oil and described pad, there is not insulating barrier;
Described carbon oil covers described pad completely and described carbon oil contacts completely with described pad.
2. the wiring board of reduction carbon oil key contact resistance according to claim 1, 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.
3. reduce a wiring board printing method for carbon oil key contact resistance, it is characterized in that, described printing method comprises:
Arrange pad at described wiring board key position, described pad comprises Copper Foil;
Described pad prints carbon oil, between described carbon oil and described pad, there is not insulating barrier; Described carbon oil covers described pad completely and described carbon oil contacts completely with described pad.
4. the wiring board printing method of reduction carbon oil key contact resistance according to claim 3, 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 |
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| Publication Number | Publication Date |
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| CN103200768A CN103200768A (en) | 2013-07-10 |
| CN103200768B true CN103200768B (en) | 2015-12-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN109548307B (en) * | 2018-12-21 | 2021-07-02 | 遂宁市广天电子有限公司 | Carbon oil plate and preparation method thereof |
| CN110769588B (en) * | 2019-10-25 | 2020-09-08 | 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 |
|---|---|---|---|---|
| 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 |
-
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 |
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| CN103200768A (en) | 2013-07-10 |
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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. |