CN113223747A - Colored conductive paste, manufacturing method thereof and printed antenna - Google Patents
Colored conductive paste, manufacturing method thereof and printed antenna Download PDFInfo
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- CN113223747A CN113223747A CN202110252592.6A CN202110252592A CN113223747A CN 113223747 A CN113223747 A CN 113223747A CN 202110252592 A CN202110252592 A CN 202110252592A CN 113223747 A CN113223747 A CN 113223747A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
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Abstract
The invention provides a colored conductive paste, a manufacturing method thereof and a printed antenna, which comprise 40-68 wt% of resin, 2-13 wt% of dye, 15-25 wt% of conductive powder, 0.5-1.5 wt% of color fixing agent, 1-2 wt% of curing agent, 0.5-2 wt% of flatting agent and 1-2.5 wt% of antioxidant. The conductive silver paste has corresponding color through the dye, so that the antenna with the same color as the substrate can be formed when the antenna is printed, and the process of spraying and shielding is omitted; by adding the antioxidant, the antenna formed by printing can be ensured not to be oxidized easily without post-process spraying. The problem of current printed antenna easy oxidation, and need increase extra spraying process and come to shield is solved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a colored conductive paste, a manufacturing method thereof and a printed antenna.
Background
With the development of wireless communication technology, mobile communication devices are equipped with more and more antennas. In order to ensure the communication quality of the antenna in a limited space, the antenna must be miniaturized and thinned. Currently, common antenna manufacturing processes include FPC antennas, LDS antennas, printed antennas, and the like.
The FPC antenna is a flexible antenna formed by using an FPC process, and can be attached to the inner side of the housing of the mobile communication device. However, the FPC antenna is subject to the process itself and cannot be formed on the outer surface of the mobile communication device.
The LDS antenna is formed by utilizing a laser plating process, and the antenna can be formed in a laser area through the surface of a shell of laser mobile communication equipment, so that the LDS antenna has the characteristics of high precision, environmental protection and simple manufacturing process. However, the LDS antenna may form a metal antenna trace on the surface of the housing after chemical plating, and if the LDS antenna is formed on the outer surface of the housing, an additional spraying process is usually required to shield the antenna trace to ensure the aesthetic appearance of the mobile communication device.
The printed antenna is formed by printing conductive silver paste on the surface of the shell of the mobile communication equipment. In order to ensure that the conductive silver paste of the printed antenna is not oxidized, a corresponding spraying process is required to be added to prevent the antenna from being oxidized. In addition, the conductive silver paste commonly used at present is usually metallic, and similar to the LDS antenna, an additional spraying process is required to shield the antenna. This undoubtedly increases the manufacturing complexity of the antenna.
Disclosure of Invention
The invention aims to provide a color conductive paste, a manufacturing method thereof and a printed antenna, so as to at least solve the problems that the existing printed antenna is easy to oxidize and needs to be shielded by adding an additional spraying process.
In order to solve the technical problems, the invention provides a colored conductive paste which comprises, by weight, 40% -68% of resin, 2% -13% of dye, 15% -25% of conductive powder, 0.5% -1.5% of a color fixing agent, 1% -2% of a curing agent, 0.5% -2% of a leveling agent and 1% -2.5% of an antioxidant.
Optionally, in the color conductive paste, the dye is a metal complex dye.
Optionally, in the color conductive paste, the metal complex dye includes one or more of alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment and alcohol-soluble blue pigment.
Optionally, in the color conductive paste, the conductive powder includes 60-78 wt% of silver powder, 7-16 wt% of glass powder, 5-12 wt% of portland cement, and 8-21 wt% of carbon fiber.
Optionally, in the color conductive paste, the average particle diameter of the silver powder is 20-300 nm; the average particle diameter of the glass powder is 10-600 nm.
Optionally, in the color conductive paste, the color conductive paste further includes an antifoaming agent in an amount of 0.5 to 1.5% by weight and a dispersant in an amount of 0.8 to 2.2% by weight.
In order to solve the above technical problem, the present invention further provides a method for manufacturing a color conductive paste, including:
preparing dye with required color by using alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment and/or alcohol-soluble blue pigment;
fully stirring 40-68 wt% of resin, 2-13 wt% of dye and 0.5-1.5 wt% of color fixing agent at 32-58 ℃ to obtain mixed slurry;
when the temperature is normal, 15-25 wt% of conductive powder, 1-2 wt% of curing agent, 0.5-2 wt% of flatting agent and 1-2.5 wt% of antioxidant are poured into the mixed slurry and fully stirred to obtain the colored conductive slurry.
Optionally, in the method for manufacturing color conductive paste, the method further includes:
at normal temperature, 0.5 to 1.5 weight percent of defoaming agent and 0.8 to 2.2 weight percent of dispersant are poured into the mixed slurry and fully stirred.
Optionally, in the method for manufacturing color conductive paste, the method for manufacturing a dye of a desired color using alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment and/or alcohol-soluble blue pigment includes:
when the black conductive paste is manufactured, the dye comprises alcohol-soluble melanin, and the weight percentage of the alcohol-soluble melanin is 5-10%;
when the colored conductive paste with other colors is manufactured, the color blending is carried out by utilizing alcohol soluble yellow pigment, alcohol soluble red pigment and/or alcohol soluble blue pigment according to the principle of three primary colors.
In order to solve the technical problem, the invention further provides a printed antenna, wherein the printed antenna is printed by using the color conductive paste.
The invention provides a color conductive paste, a manufacturing method thereof and a printed antenna, which comprise 40-68 wt% of resin, 2-13 wt% of dye, 15-25 wt% of conductive powder, 0.5-1.5 wt% of color fixing agent, 1-2 wt% of curing agent, 0.5-2 wt% of flatting agent and 1-2.5 wt% of antioxidant. The conductive silver paste has corresponding color through the dye, so that the antenna with the same color as the substrate can be formed when the antenna is printed, and the process of spraying and shielding is omitted; by adding the antioxidant, the antenna formed by printing can be ensured not to be oxidized easily without post-process spraying. The problem of current printed antenna easy oxidation, and need increase extra spraying process and come to shield is solved.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a color conductive paste according to this embodiment.
Detailed Description
The present invention provides a color conductive paste, a method for manufacturing the same, and a printed antenna, which are described in detail below with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment provides a color conductive paste, which comprises, by weight, 40% to 68% of resin, 2% to 13% of dye, 15% to 25% of conductive powder, 0.5% to 1.5% of color fixing agent, 1% to 2% of curing agent, 0.5% to 2% of leveling agent, and 1% to 2.5% of antioxidant.
According to the colored conductive paste provided by the embodiment, the conductive silver paste has corresponding colors through the dye, so that the antenna with the color consistent with that of the base material can be formed when the antenna is printed, and the process of spraying and shielding is omitted; by adding the antioxidant, the antenna formed by printing can be ensured not to be oxidized easily without post-process spraying. The problem of current printed antenna easy oxidation, and need increase extra spraying process and come to shield is solved.
Specifically, in the present embodiment, the resin includes one or more of an acrylic resin, a polyurethane resin, a polyketone resin, and an epoxy resin.
The dye selected in this embodiment is a metal complex dye, so that the dye and the conductive powder can be fully mixed, and the conductivity of the color conductive paste is ensured. In the specific process of blending the dye, one or more of alcohol soluble yellow pigment, alcohol soluble red pigment and alcohol soluble blue pigment with different proportions are added by utilizing the principle of three primary colors, so that the colored conductive paste with various colors can be obtained. Of course, increasing the specific gravity of the dye in the color conductive paste can increase the depth of the color. Therefore, the conductive color paste with different colors and different depths can be realized.
In the color conductive paste provided in this embodiment, the conductive powder includes, by weight, 60% to 78% of silver powder, 7% to 16% of glass frit, 5% to 12% of portland cement, and 8% to 21% of carbon fiber. The specific gravity of the silver powder is preferably 65-75%, so that better conductivity is ensured; the addition of the carbon fibers can further improve the conductivity of the conductive powder; the glass powder and the Portland cement can improve the fact that the conductive powder can be fully and uniformly fused with resin, and the color conductive slurry can be firmly combined with the base material after printing.
Preferably, in the present embodiment, the average particle diameter of the silver powder is 20 to 300 nm; the average particle diameter of the glass powder is 10-600 nm. So can form thinner antenna when printing and walk the line, and then reduced the space that the antenna took, can also guarantee simultaneously that antenna substrate surface can not form great segment difference. Meanwhile, the silver powder has smaller particles, so that the silver powder can be more uniformly and finely distributed in the colored conductive paste, and the conductivity is improved.
Further, in this embodiment, the color conductive paste further includes an antifoaming agent in an amount of 0.5% to 1.5% by weight and a dispersant in an amount of 0.8% to 2.2% by weight. By adding the defoaming agent and the dispersing agent, fine bubbles can be prevented from being generated in the slurry in the antenna printing process, and the problem that the colored conductive slurry is not printed in a partial area in the printing process is avoided; meanwhile, the components in the colored conductive paste can be uniformly dispersed in the whole colored conductive paste, and the stability of the colored conductive paste is improved.
The embodiment also provides a manufacturing method of the color conductive paste, as shown in fig. 1, the manufacturing method includes:
s1, preparing the dye with the needed color by using alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment and/or alcohol-soluble blue pigment;
s2, fully stirring 40-68 wt% of resin, 2-13 wt% of dye and 0.5-1.5 wt% of color fixing agent at 32-58 ℃ to obtain mixed slurry;
s3, when the temperature is normal, pouring 15-25 wt% of conductive powder, 1-2 wt% of curing agent, 0.5-2 wt% of flatting agent and 1-2.5 wt% of antioxidant into the mixed slurry, and fully stirring to obtain the color conductive slurry.
According to the manufacturing method of the colored conductive paste, the conductive silver paste has corresponding colors through the dye, so that the antenna with the same color as the base material can be formed when the antenna is printed, and the process of spraying and shielding is omitted; by adding the antioxidant, the antenna formed by printing can be ensured not to be oxidized easily without post-process spraying. The problem of current printed antenna easy oxidation, and need increase extra spraying process and come to shield is solved.
Preferably, in this embodiment, the method for manufacturing the color conductive paste further includes:
at normal temperature, 0.5 to 1.5 weight percent of defoaming agent and 0.8 to 2.2 weight percent of dispersant are poured into the mixed slurry and fully stirred.
By adding the defoaming agent and the dispersing agent, fine bubbles can be prevented from being generated in the slurry in the antenna printing process, and the problem that the colored conductive slurry is not printed in a partial area in the printing process is avoided; meanwhile, the components in the colored conductive paste can be uniformly dispersed in the whole colored conductive paste, and the stability of the colored conductive paste is improved.
In the method for manufacturing color conductive paste according to this embodiment, the method for manufacturing a dye of a desired color using alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment, and/or alcohol-soluble blue pigment includes:
when the black conductive paste is manufactured, the dye comprises alcohol-soluble melanin, and the weight percentage of the alcohol-soluble melanin is 5-10%;
when the colored conductive paste with other colors is manufactured, the color blending is carried out by utilizing alcohol soluble yellow pigment, alcohol soluble red pigment and/or alcohol soluble blue pigment according to the principle of three primary colors.
As mentioned above, the color conductive paste with various colors can be obtained by adding one or more of alcohol soluble yellow pigment, alcohol soluble red pigment and alcohol soluble blue pigment with different proportions. And the specific gravity of the dye in the color conductive paste is increased, so that the color depth of the color conductive paste can be increased. Therefore, the conductive color paste with different colors and different depths can be realized.
In step S2, at 32-58 ℃ (slightly higher than normal temperature), the resin, the dye and the fixing agent are stirred, so that the resin can be fused with the dye and the fixing agent under good fluidity to obtain uniform mixed slurry.
Because the silver powder in the conductive powder is easy to oxidize at high temperature and the portland cement is easy to solidify at high temperature, the conductive powder, the curing agent, the leveling agent, the antioxidant and the like are fused with the mixed slurry at normal temperature to obtain uniform colored conductive slurry.
It should be noted that, because the group of portions of the color conductive paste provided in this embodiment may be cured in a general environment along with the passage of time, when the color conductive paste is used for production and processing, a preparation method along with use is preferred, so as to avoid the problem that the color conductive paste is discarded due to long storage time caused by too much preparation at one time.
The embodiment also provides a printed antenna which is printed by using the color conductive paste provided by the embodiment.
The following describes the color conductive paste, the manufacturing method thereof, and the printed antenna provided in this embodiment by taking a specific process for manufacturing a green printed antenna as an example.
First, a green dye was prepared. Specifically, alcohol soluble yellow pigment and alcohol soluble blue pigment are mixed in a ratio of 1:1 to prepare a green dye. In this example, 100g of each of the alcohol-soluble yellow pigment and the alcohol-soluble blue pigment was prepared to 200g of a green dye.
Then, the conductive powder is prepared. Specifically, 130 +/-10 g of silver powder, 30 +/-2 g of glass powder, 20 +/-4 g of Portland cement and 30 +/-5 g of carbon fiber are mixed to prepare the conductive powder, and the weight of the conductive powder is about 210 g.
Then, under the environment of 40 +/-2 ℃, 500 +/-20 g of resin, 130+0/-20g of blended green dye and 10 +/-5 g of fixing agent are fully stirred to obtain mixed slurry. Specifically, in the present embodiment, the resin is an epoxy resin. In practical application, the weight of the green dye can be adjusted according to the actual green depth, and the green color is darker as the weight is larger.
After preliminary mixing and stirring for about 5min, stopping heating, placing in a normal-temperature environment, continuously stirring, keeping the mixed slurry from solidifying, and simultaneously further improving the uniformity of the mixed slurry.
After the temperature of the mixed slurry is below 28 ℃, 200 +/-10 g of the conductive powder, 15 +/-3 g of the curing agent, 15 +/-3 g of the leveling agent and 15 +/-3 g of the antioxidant which are prepared in the above way are poured into the mixed slurry for stirring. In this embodiment, preferably, 10. + -.2 g of antifoaming agent and 10. + -.2 g of dispersant are also added.
And after mixing for about 10min again, uniformly mixing the components in the color conductive paste, and using the mixture to manufacture the printed antenna.
Pouring the color conductive slurry into the ink box, covering the pad printing cover plate, and debugging the pad printing machine.
The green plastic shell is wiped by using absolute alcohol, so that the pollution of the plastic shell used for pad printing is avoided.
And finally, starting the pad printing machine, so that the green conductive paste is printed on the green plastic shell, and further forming the antenna.
Note that the operation of pad printing by a pad printing machine and the operation of the equipment are well known to those skilled in the relevant art, and will not be described herein.
The green printed antenna formed in the way is consistent with the green plastic shell in color, the thickness is within 12 mu m, and the level difference of the surface is within a generally acceptable range, so that a dye does not need to be sprayed again to cover the antenna area; meanwhile, due to the existence of the antioxidant, the green antenna is not easy to be oxidized, so that the anti-oxidation coating is not required to be formed by spraying again. Thus, the process steps are saved.
In summary, the color conductive paste, the manufacturing method thereof, and the printed antenna provided in this embodiment include, by weight, 40% to 68% of resin, 2% to 13% of dye, 15% to 25% of conductive powder, 0.5% to 1.5% of color fixing agent, 1% to 2% of curing agent, 0.5% to 2% of leveling agent, and 1% to 2.5% of antioxidant. The conductive silver paste has corresponding color through the dye, so that the antenna with the same color as the substrate can be formed when the antenna is printed, and the process of spraying and shielding is omitted; by adding the antioxidant, the antenna formed by printing can be ensured not to be oxidized easily without post-process spraying. The problem of current printed antenna easy oxidation, and need increase extra spraying process and come to shield is solved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. The color conductive slurry is characterized by comprising 40-68 wt% of resin, 2-13 wt% of dye, 15-25 wt% of conductive powder, 0.5-1.5 wt% of color fixing agent, 1-2 wt% of curing agent, 0.5-2 wt% of leveling agent and 1-2.5 wt% of antioxidant.
2. The colored conductive paste according to claim 1, wherein the dye is a metal complex dye.
3. The color conductive paste according to claim 2, wherein the metal complex dye comprises one or more of a prolamine melanin, a prolamine yellow pigment, a prolamine red pigment, and a prolamine blue pigment.
4. The color conductive paste according to claim 1, wherein the conductive powder comprises 60-78% by weight of silver powder, 7-16% by weight of glass frit, 5-12% by weight of portland cement, and 8-21% by weight of carbon fiber.
5. The color conductive paste according to claim 4, wherein the silver powder has an average particle diameter of 20 to 300 nm; the average particle diameter of the glass powder is 10-600 nm.
6. The color conductive paste according to claim 1, further comprising 0.5-1.5 wt% of a defoaming agent and 0.8-2.2 wt% of a dispersing agent.
7. A method for manufacturing a color conductive paste, the method comprising:
preparing dye with required color by using alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment and/or alcohol-soluble blue pigment;
fully stirring 40-68 wt% of resin, 2-13 wt% of dye and 0.5-1.5 wt% of color fixing agent at 32-58 ℃ to obtain mixed slurry;
when the temperature is normal, 15-25 wt% of conductive powder, 1-2 wt% of curing agent, 0.5-2 wt% of flatting agent and 1-2.5 wt% of antioxidant are poured into the mixed slurry and fully stirred to obtain the colored conductive slurry.
8. The method for manufacturing colored conductive paste according to claim 7, further comprising:
at normal temperature, 0.5 to 1.5 weight percent of defoaming agent and 0.8 to 2.2 weight percent of dispersant are poured into the mixed slurry and fully stirred.
9. The method for manufacturing colored conductive paste according to claim 7, wherein the method for manufacturing the dye with the desired color by using alcohol-soluble melanin, alcohol-soluble yellow pigment, alcohol-soluble red pigment and/or alcohol-soluble blue pigment comprises:
when the black conductive paste is manufactured, the dye comprises alcohol-soluble melanin, and the weight percentage of the alcohol-soluble melanin is 5-10%;
when the colored conductive paste with other colors is manufactured, the color blending is carried out by utilizing alcohol soluble yellow pigment, alcohol soluble red pigment and/or alcohol soluble blue pigment according to the principle of three primary colors.
10. A printed antenna, characterized in that the printed antenna is printed by using the conductive paste according to any one of claims 1 to 6.
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| CN202110252592.6A CN113223747A (en) | 2021-03-09 | 2021-03-09 | Colored conductive paste, manufacturing method thereof and printed antenna |
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| CN110310760A (en) * | 2019-07-25 | 2019-10-08 | Oppo广东移动通信有限公司 | Antenna silver paste and preparation method, antenna for electronic equipment, electronic equipment |
| CN110838391A (en) * | 2019-11-28 | 2020-02-25 | 衡阳思迈科科技有限公司 | Method for manufacturing high-temperature-resistant conductive silver paste |
| CN111863308A (en) * | 2019-04-30 | 2020-10-30 | 北京梦之墨科技有限公司 | Colored conductive paste, preparation method thereof and electronic device |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11306862A (en) * | 1998-04-23 | 1999-11-05 | Central Glass Co Ltd | Conductor paste |
| JP2001093328A (en) * | 1999-09-27 | 2001-04-06 | Jsr Corp | Color conductive paste, its using method and circuit board using it |
| JP2002025338A (en) * | 2000-07-11 | 2002-01-25 | Tsuchiya Co Ltd | Coloring conductive paste and conductive laminate using the same, and manufacturing method of the same |
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