CN101316001A - Method for producing radio frequency label antenna, and radio frequency label antenna and label - Google Patents
Method for producing radio frequency label antenna, and radio frequency label antenna and label Download PDFInfo
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- CN101316001A CN101316001A CNA2008100577422A CN200810057742A CN101316001A CN 101316001 A CN101316001 A CN 101316001A CN A2008100577422 A CNA2008100577422 A CN A2008100577422A CN 200810057742 A CN200810057742 A CN 200810057742A CN 101316001 A CN101316001 A CN 101316001A
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Abstract
The invention relates to a method for fabricating radio-frequency label antenna, a radio-frequency label antenna and a label. The method of the invention comprises the steps as follows: A) a gold stamping step: a gold stamping material with a first metal layer is used for carrying out the gold stamping disposal on the printing stock; the radio-frequency antenna pattern of the first metal layer is formed on the printing stock; B) a replacement step: the ion solution of the second metal used for carrying out the replacement reaction with the first metal contacts with the first metal layer; at least a part of the first metal layer is replaced as the second metal. The method of the invention reduces the sheet resistance of the printing antenna, has simple process, high production efficiency and easy controlling, and can be used for the manufacture of various RFID antennas of full range with high precision, low resistance, high conductivity, and thick metal films.
Description
Technical field
The present invention relates to a kind of method of radio-frequency label antenna and radio-frequency label antenna made from this method made.
Background technology
Radio frequency label technology (RFID) have precision height, accommodative ability of environment strong, read distance, anti-interference strong, use many advantages such as facility, in various fields (shown in U.S. Patent Publication No. US5206626, US5448110 and US5497140) such as industrial automation, business automation, the communications and transportation control and management potentiality that all are widely used, it will be referred to the various aspects of people's daily life, has huge market value.But because present RFID label preparing technology complexity, manufacturing cost is higher relatively, and particularly the making of its critical component RFID antenna also has many restrictions at technological layer, and therefore, the RFID label technique does not also obtain due popularizing.
It below is the common technique scheme of prior art.
Patent 1. blanchings gold legal system is made radio-frequency antenna (U.S. Patent Publication No.: US6320556)
At first be coated with heat-sensitive glue on the flexible substrate surface by antenna pattern; Then gold stamping mould is arrived substrate surface, make both gluing parts bonding to its heating simultaneously; Gold stamping film is peeled off, removed not bonding part, finish antenna processing.The mentioned conducting film of patent is Foilmark, Inc.ofNewburyport, and the gold stamping film of ordinary hot that Mass. company produces, thickness is about 25.4 μ m, comprises substrate and metal coating; Equipment is Moore North American, Inc., circle press circle blanching gold equipment.
Patent 2. printing corrosion-gold stamping legal system antenna (U.S. Patent Publication No.: US7159298)
At first deposit thickness is the aluminum metal layer of 0.001～0.25 μ m on substrate; The regional type metal corrosive agent beyond the antenna pattern on the metal level of substrate then is with the corrosion of metals powdering; Water flushing then, remaining metal antenna pattern on the substrate; Last alignment, gluing, peel off, adopt the method for cold wave gold that antenna pattern is transferred to radio-frequency (RF) tag printable fabric surface.
Patent 3. thermoprints-cross cutting is made radio-frequency antenna (Chinese patent application publication number: CN1988257A)
Thermoprint layer at first, it is to be used to transfer to substrate surface to make the metal material of antenna (as: copper, aluminium etc.), structure is made up of conductive layer and hot melt adhesive layer; The thermoprint layer is adhered to substrate surface under the effect of the pressure of thermoprint mould and heat then; Then, the thermoprint layer of transferring to substrate surface is carried out cross cutting by cross cutting instrument antenna pattern form on request; Separate at last and form the fundamental figure of radio-frequency antenna.
Patent 4. cuts-bonding legal system radio-frequency antenna (Japanese Unexamined Patent Publication No: JP2006295485)
Bronzing material is made up of base material, metal forming, three separating layers of adhesive, employing cuts bond tool, cut out with the main part of the blade on the instrument antenna, the subsidiary heating unit of instrument heats the adhesive of determining under the part simultaneously, make the PUR fusing, the metal forming of antenna body part is adhered on the base material, and not bonding metal forming is peeled off and finished antenna processing.
In the method for printing the RFID antenna, the metal antenna rete that the punching press etching method is made is thick, is unfavorable for making flexible label, and manufacturing speed is slow simultaneously, and productive rate is low; Vacuum deposition method, coating can be thinner, but complex process, same productive rate is lower; The conductive oil method of the use of ink and water, the speed of making is very fast, but the electric conductivity of printed antenna is relatively poor, and the electrically conductive ink preparation process is also comparatively complicated simultaneously, and cost is also higher.Comparatively speaking, gold stamping method can overcome the above problems preferably, and the advantage that its cost is low, technology is simple, productive rate is high is printed company by antenna and accepted, but its transfer printing metal film is thinner, the impedance height can only use in limited scope, is difficult to use in the making of antenna commonly used.
Aspect solution, can adopt thick film layers to keep the high system precision of scalding to become the key that gold stamping method technology is extended to all RFID antennas printings simultaneously, because the relation that conditions each other between thickness of coating and the boiling hot system precision, merely reduce the impedance meeting and make boiling hot system precise decreasing even can cause gold stamping can't the realization, therefore by increasing the defective that the bronzing material metal layer thickness can't solve gold stamping method prints labels sky Wiring technology by the raising thickness of coating.
2 pairs of bronzing materials of patent improve, and have increased the thickness of metal-coated membrane, have reduced square resistance.Consider thickness of coating and scald the relation that conditions each other between the system precision, introduced traditional lithographic method, earlier metal film is carried out cold wave transfer printing again after the etching, though whole process has increased metallic diaphragm thickness, but printing corrosive liquid, alignment have been added, increase operation easier, reduced process velocity.
Patent 3 is that gold stamping later stage product is carried out back processing, has introduced the technology of cross cutting, can handle thick film layers preferably, but for the complex antenna pattern, its die-cutting rule is difficult for processing, and process velocity is also slower simultaneously.
Patent 4 is comparatively similar to patent 3, and difference is that this technology is a first cross cutting blanching gold again, so it also exists die-cutting rule to be difficult for processing and the slow shortcoming of process velocity.
Patent 2,3,4 all needs to adopt the bronzing material of the special thicker coat of metal simultaneously, and this also is unfavorable for the popularization of whole technique.
Summary of the invention
The present invention is exactly the difficulty that occurs in the present RFID antenna manufacturing process, has proposed the process program of a uniqueness.
As mentioned above, in the manufacture method of present RFID antenna, the rete that has is too thick, is unfavorable for making flexible label; The electric conductivity that has is relatively poor, can not contain all frequency ranges; The manufacturing process complexity that has, the stability and the reliability of product are relatively poor.
The problem to be solved in the present invention is exactly to print precision and preferably under the prerequisite of flexibility keeping high, increase and print metal layer thickness, thereby reduce the impedance of printed antenna, make the range of application of gold stamping method printed antenna extend to most of antennas of various project organizations, all frequency range.
A kind of method of making radio-frequency label antenna may further comprise the steps:
A) gold stamping step: with bronzing material stock is carried out gold stamping processing, on stock, form the radio-frequency antenna pattern of the first metal layer with the first metal layer;
B) displacement step: with can contacting with the first metal layer, at least a portion of the first metal layer is replaced as second metal with the solion that first metal carries out second metal of displacement reaction.
The conductance of preferred second metal is higher than first metal.
The ionic valence condition of preferred second metal is equal to or less than the ionic valence condition of first metal.
The corrosion resistance of preferred second metal is higher than first metal.
Preferred first metal is an aluminium.Second metal is selected from least a in the group that is made of zinc, manganese, nickel, iron, tin, copper, silver, gold.
Preferred first metal is a copper.Second metal is selected from least a by in silver, the group that constitutes of gold.
Preferred stock is a sheet material.More preferably stock is paper or film.
Method of the present invention further comprises:
C) rinsing step: with the metal level after the liquid wash displacement reaction, so that rinse out the product and the solution of displacement reaction.
The invention still further relates to the radio-frequency label antenna of method manufacturing of the present invention and label with this antenna.
A) in the gold stamping step, the cold wave method can be adopted, also the blanching method can be adopted.In order to simplify narration, in this article, will adopt silver as second metal and adopt the technology of cold wave method to abbreviate as " cold wave-heavy silver process ", will adopt silver as second metal and adopt the technology of blanching method to abbreviate as " blanching-heavy silver process ".
Beneficial effect of the present invention:
1. reduce side's resistance of printed antenna
Especially when the conductance of second metal that adopts during, can significantly reduce side's resistance of printed antenna greater than first metal.Is example as first metal, silver as second metal with aluminium, and concrete reaction equation is:
3Ag
++Al＝Al
3++3Ag
The Al of every 1mol can displace the argent of 3mol, at common bronzing material metal cladding is under the situation of 0.05 μ m, if react completely, the silver thickness that cements out is at least three times of former transfer printing layer, consider that simultaneously silver atoms is much larger than the aluminium atom, the conductance of silver is higher than aluminium, therefore, silver layer after heavy silver process is handled is equivalent to the former aluminium lamination electric conductivity of 5 times of thickness at least, can reach 0.25 μ m (promptly by method of the present invention, after silver displacement aluminium, resulting side's resistance is equivalent to side's resistance of 0.25 μ m aluminium lamination), its side's resistance is at least the following (see figure 9) of 0.01 Ω/, has also reached the effect of patent 2 fully.
2. be to print the reaction solution layer or adopt the operation of spray, soaking solution all to need not alignment, simple to operate, adopt on line processing, boiling hot system speed is fast, the production efficiency height.
3. second metal level that displaces simultaneously can be protected first metal (for example aluminium), prevents the quick oxidation of first metal, helps welding, the involution of chip.
4. utilize method of replacing to handle and still can keep gold stamping high density fine rule, make fineness height (0.05mm).
5. the replacement reaction speed of the solion of first metal (for example aluminium) and second metal (for example silver) is fast, simultaneously by the control displacement reaction time well control surface displace metal layer thickness, be easy to produce the antenna of different impedance requirements.
6. make the range of application of gold stamping method printed antenna extend to various project organizations, all frequency range, the labyrinth that comprises 2.45GHz～5.8GHz (Fig. 1) frequency range, 9～135KHz of low frequency, 13.56MHz (Fig. 2), and 300M～1.2GHz, most of antennas of 900MHz (Fig. 3) frequency range.
7. method of the present invention can adopt existing conventional or traditional bronzing material, and the bronzing material that for example is purchased can be realized the production of low square resistance, full frequency band RFID antenna, need not the special special-purpose bronzing material of making.
8. method of the present invention can adopt existing conventional or traditional gold stamping equipment, especially can utilize the gold stamping equipment that is purchased, and only needs in case of necessity to improve a little, need not the special special-purpose gold stamping equipment of making.
9. RFID antenna metal film or metal layer thickness that method of the present invention is produced are moderate, are beneficial to the making flexible label.
Thereby method of the present invention can significantly reduce production costs, and enhances productivity.
Therefore, the present invention has realized the technological break-through of gold stamping method printing high accuracy, Low ESR, high conductivity, thick metal film RFID antenna.
Description of drawings
Fig. 1 shows the 2.45GHz antenna structure.
Fig. 2 shows the 13.56MHz antenna structure.
Fig. 3 shows the 915MHz antenna structure.
Fig. 4 shows RFID at the global overall distribution figure of each frequency range (1,000,000 unit).
Fig. 5 shows the technology of first embodiment.
Fig. 6 shows the technology of second embodiment.
When Fig. 7 showed the technology that adopts first embodiment, cold wave gold copper-base alloy and stock cutaway view changed.
When Fig. 8 showed the technology that adopts second embodiment, blanching gold copper-base alloy and stock cutaway view changed.
Fig. 9 shows the method side of mensurationing according to standard GB/T 15717-1995 regulation and hinders change curve with aluminum layer thickness.
Embodiment
What the present invention will solve is exactly how to adopt the common bronzing material that is easy to promote to print high accuracy, thick metallic diaphragm, Low ESR RFID antenna, simplifies technology simultaneously, improves productive rate, reduces cost.
The present invention relates to a kind of method of producing radio-frequency antenna, may further comprise the steps:
A) gold stamping step: with bronzing material stock is carried out gold stamping processing, on stock, form the radio-frequency antenna pattern of the first metal layer with the first metal layer;
B) displacement step: with can contacting with the first metal layer, at least a portion of the first metal layer is replaced as second metal with the solion that first metal simple-substance carries out second metal of displacement reaction.
Method of the present invention further comprises alternatively:
C) rinsing step.After reaction a period of time, can rinse out the product (solution and the metallic aluminium ion that displaces) of displacement reaction with liquid (for example water), so that stop displacement reaction, and the cleaning antenna pattern.
Method of the present invention further comprises alternatively:
D) drying steps.After flushing, can carry out drying, so that obtain dry article.Drying means can conventional or traditional method, for example oven dry.Those skilled in the art are easy to determine drying time by simple experiment, do not repeat them here.
Stock is sheet material preferably, for example substrate.Substrate can adopt various paper or film.
Common or conventional bronzing material be can adopt, cold wave gold and blanching gold copper-base alloy comprised.Bronzing material can use the bronzing material that is purchased, for example orange cold foil.Common blanching or cold orange cold foil that orange cold foil can adopt KURZ to produce, or other surface thickness consistency orange cold foil (electrochemical aluminium) preferably.
First metal is aluminium preferably, more preferably vacuum evaporated aluminium.Also can select for use and can use other metal that can be used as the bronzing material metal level, for example copper.
Second metal is the metal that can carry out displacement reaction with first metal simple-substance.Although be reluctant to be limited by theory, common second metal is the chemism metal more weak than first metal.The performance of preferred second metal is better than first metal.Second metal is the conductivity metal better than first metal preferably also, and promptly resistivity is lower than first metal (conductance is higher than first metal).Second metal is the ionic valence condition metal lower than first metal preferably further.The corrosion resistance of preferred second metal is higher than first metal, and especially oxidative resistance is higher than first metal.Second metal is atomic radius second metal bigger than first metal preferably further.At first metal is under the situation of aluminium, and for example, second metal ion can be zinc ion, manganese ion, nickel ion, iron ion, tin ion, copper ion, silver ion, gold ion.At first metal is under the situation of copper, and for example, the ion of second metal can be silver ion, gold ion.
These second metal ions can use separately, also can be used in combination, and promptly the solion that second metallic solution can single metal also can be the mixed solution of multiple metal ion.When adopting the reaction of silver ion and aluminium (Al), when replacing, concrete reaction equation is:
3Ag
++Al＝Al
3++3Ag
Can include additive in the solion of second metal, for example be used to strengthen the additive of the second layer on surface of metal solderability, for example: Loprazolam, histidine etc.For example, second metal ion solution can be the mixed solution based on second metal ion, and the ion of second metal comprises: silver ion, zinc ion, manganese ion, nickel ion, iron ion, tin ion, copper ion, silver ion, gold ion.
Can prepare the concentration of the solion of second metal as required.The for example preferred 1～5mol/L of the concentration of the solion of second metal, more preferably 0.1～1mol/L, most preferably 1～10mmol/L.
To those skilled in the art, the mode that the solion of second metal contacts with the first metal layer is known, and for example can adopt modes such as printing, spray, immersion to make the two contact.
The time (being the displacement reaction time) that can contact with first Metal Contact by the ion of control second metal is controlled displacement back metal layer thickness, for example, the time of being separated by between dashing with water by control printing (or spray, soak) changes metal layer thickness after the displacement.Those of ordinary skills can be according to thickness of the thickness of displacement reaction speed, first metal, required second metal etc., determines the time that the ion of second metal contacts with first Metal Contact, i.e. the time of displacement reaction.For example, preferred 0.1～10min of the time of displacement reaction, more preferably 1～3min, most preferably 0.1～1min.By the time that the control displacement reaction is carried out, control surface displaces metal layer thickness well, is easy to produce the antenna of different impedance requirements.For example, 1/20,1/10,1/5,1/4,1/3,1/2,2/3,3/4 of first metal can be replaced as second metal, also first metal all can be replaced as second metal.
In first embodiment of the present invention, adopt the cold wave gold copper-base alloy to carry out gold stamping.At first on the making stock of radio-frequency (RF) tag, print UV glue according to antenna pattern; Then stock is toasted through the UV lamp, make glue be viscosity, bronzing material and stock pressing; Then bronzing material is torn off from stock, first metal part of gluing is just transferred on the stock; Next step, the solion thin layer of printing second metal on stock, the solion of second metal and the first metal generation displacement reaction, at least a portion of first metal is replaced as second metal level; Water dashes then, rinses out the product (solution and first metal that displaces) of displacement reaction, just finishes the making of antenna after the drying.
Fig. 5 shows the technology of first embodiment of the present invention in the mode of technological process module.Fig. 7 changes the step that shows first embodiment of the present invention with blanching gold copper-base alloy and stock cutaway view.With reference to Fig. 5 and Fig. 7, specific as follows described.
Step 1, gluing.In unit (1-1), spread on stock 101 with the UV glue 102 of offset printing forme, so that on the stock 101 of radio-frequency (RF) tag, print UV glue 102 according to antenna pattern with high viscosity.
Step 2, the shop paper tinsel.(1-3) (offset print unit) in the unit transferred to the first metal layer 104 or first metal forming 104 on the stock 101 between blanket and impression cylinder.Through the baking of UV lamp, make glue be viscosity stock 101, then with cold wave gold copper-base alloy 100 and stock 101 pressings.
Step 3 is peeled off.Then cold wave gold copper-base alloy 100 is torn off from stock 101, the first metallic foil pattern 104A of gummed just transfers on the stock 101.The counterdie 103 that has useless paper tinsel 104B is stripped from, and the stock 101 that is covered with the first metallic foil pattern 104A of gummed simultaneously transfers to next step.Wherein, as shown in Figure 5, in unit (1-2), finish unreeling and rolling of cold wave gold copper-base alloy 100.
Step 4, printing solutions.In unit (1-4), the solion 105 of printing second metal on the first metallic foil pattern 104A of stock 101.
Step 5, displacement reaction.Displacement reaction takes place with the first metallic foil pattern 104A of gummed in the solion 105 of second metal, obtains second metal level 107 by displacement.
Step 6, flushing.Then, in unit (1-5), with solvent solution 106 after the reaction on water flushing stock 101 surfaces for example, so that rinse out the product (solution and the metallic aluminium that displaces) of displacement reaction.
Step 7, drying.At last, in unit (1-6), stock 101 is carried out drying, for example oven dry.
In second embodiment of the present invention, adopt the blanching gold copper-base alloy to carry out gold stamping.With the heating gold stamping template with stock and orange cold foil pressing, gold stamping version is made into antenna pattern positive version, the adhesive of gold stamping version projection is heated with stock bonding, pressing once more, after the adhesive full solidification, orange cold foil is peeled off from stock, just be left the first metal layer of antenna pattern on the stock, following step is basic identical with first embodiment that adopts the cold wave gold.
Fig. 6 shows the technology of second embodiment of the present invention in the mode of technological process module.Fig. 8 changes the step that shows second embodiment of the present invention with blanching gold copper-base alloy and stock cutaway view.With reference to Fig. 6 and Fig. 8, specific as follows described.
Step 1 unreels the shop paper tinsel.In unit (2-1), blanching gold copper-base alloy 200 is unreeled.Wherein, as shown in Figure 8, blanching gold copper-base alloy 200 comprises the PUR 202 of the counterdie 203 on top, middle the first metal layer 204 or first metal forming 204, bottom.
Step 2, the blanching pressing.Blanching be pressed together on unit (2-2) and (2-3) in carry out.That emits twists in unit (2-2) middle berth paper tinsel blanching; Then in the unit (2-3) with the gold stamping template 208 of heating or gold stamping version 208 with stock 201 and 200 pressings of blanching gold copper-base alloy, wherein gold stamping template 208 or gold stamping version 208 are made into antenna pattern positive version, and the PUR 202 of gold stamping template 208 or gold stamping version 208 projections is heated with stock 201 bonding.
Step 3 is peeled off.In the unit (2-3), wait PUR 202 full solidification after, blanching gold copper-base alloy 200 is peeled off from stock 201, just be left the first metal pattern 204A of antenna pattern on the stock 201.The stock 201 that is covered with the first metallic foil pattern 204A of gummed transfers to next step, and the counterdie 203 that has useless paper tinsel 204B is stripped from (4) rolling in the unit.Have on the stock 201 of the first metal pattern 204A and enter next procedure.
Step 4, spray solution.In unit (2-5), with solion 205 spray of second metal on the first metallic foil pattern 204A.
Step 5, displacement reaction.At least a portion generation displacement reaction of the solion 205 of second metal and the first metallic foil pattern 204A, and obtain second metal level 207.
Step 6, flushing.(2-6) washes with solvent (for example water) in the unit, thereby reacted solution 206 is rinsed out.
Step 7, drying.In unit (2-7), stock 201 is carried out drying (for example oven dry) at last.
In above-mentioned first and second embodiments, as shown in FIG., after displacement reaction takes place in the solion 105 of second metal or the 205 and first metallic foil pattern 104A or 204A, only remaining second metal level 107 or 207.But the embodiment of describing and illustrating only is exemplary, as mentioned above, those skilled in the art can adjust the displacement reaction time as required, thereby the degree that the control displacement reaction is carried out, make that only some the first metallic foil pattern 104A or 204A are replaced as second metal level 107 or 207, and form double-decker with two metal levels.
The equipment of implementing the inventive method can be the equipment that is purchased.For example, cold wave-heavy silver-colored equipment can adopt Heidelberg CD102 offset press, needs to increase the gold stamping module of FoilStar, and one of them unit is used to print the solion of second metal, adopts the drying system that carries.Apparatus processing speed maximum can reach 16000 the seal/hour, maximum breadth can reach 720mm * 1020mm, the lines precision can reach 0.05mm, also can adopt rotary printer, or other printing machines, the cold wave machine.
For example, blanching-heavy silver-colored equipment can adopt Bo Site FoilJet104 FBR rotary-cutting hot stamping machine, add on line formula spray and drying system, the process velocity maximum can reach 12000/hour, maximum breadth can reach 720 * 1040mm, also can adopt platen, circle to flatten gilding press, or other blanchers, heat transfer machine.
The invention still further relates to the radio-frequency label antenna of method manufacturing of the present invention and label with this antenna.
Beneficial effect of the present invention:
1. reduce side's resistance of printed antenna
Especially when the conductance of second metal that adopts during, can significantly reduce side's resistance of printed antenna greater than first metal.Is example as first metal, silver as second metal with aluminium, concrete reaction equation:
3Ag
++Al＝Al
3++3Ag
The Al of every 1mol can displace the argent of 3mol, at common bronzing material metal cladding is under the situation of 0.05 μ m, if react completely, the silver thickness that cements out is at least three times of former transfer printing layer, consider that simultaneously silver atoms is much larger than the aluminium atom, the conductance of silver is higher than aluminium, therefore the silver layer after this heavy silver process is handled is equivalent to the former aluminium lamination electric conductivity of 5 times of thickness at least, can reach 0.25 μ m, its side's resistance (is seen Fig. 9 below being at least 0.01 Ω/, entity relationship diagram according to standard GB/T 15717-1995 " vacuum metal thickness of coating test methods electrical resistance method " electrochemical aluminium thickness of mensuration and side's resistance), also reached the effect of patent 2 fully.
2. be to print the reaction solution layer or adopt the operation of spray, soaking solution all to need not alignment, simple to operate, adopt on line processing, boiling hot system speed is fast, the production efficiency height.
3. second metal level that displaces simultaneously can be protected first metal (for example aluminium), prevents the quick oxidation of first metal, helps welding, the involution of chip.
4. utilize method of replacing to handle and still can keep gold stamping high density fine rule, make fineness height (0.05mm).
5. first metal (for example aluminium) is fast with the replacement reaction speed of the solion of second metal (for example silver), simultaneously by control print blanking time that solution and water dashes well control surface displace metal layer thickness, be easy to produce the antenna of different impedance requirements.
6. make the range of application of gold stamping method printed antenna extend to various project organizations, all frequency range, the labyrinth that comprises 2.45GHz～5.8GHz (Fig. 1) frequency range, 9～135KHz of low frequency, 13.56MHz (Fig. 2), and 300M～1.2GHz, most of antennas of 900MHz (Fig. 3) frequency range.
7. method of the present invention can adopt existing conventional or traditional bronzing material, and the bronzing material that for example is purchased can be realized the production of low square resistance, full frequency band RFID antenna, need not the special special-purpose bronzing material of making.
8. method of the present invention can adopt existing conventional or traditional gold stamping equipment, especially can utilize the gold stamping equipment that is purchased, and only needs sometimes to improve a little, need not the special special-purpose gold stamping equipment of making.
9. RFID antenna metal film or metal layer thickness that method of the present invention is produced are moderate, are beneficial to the making flexible label.
Thereby method of the present invention can significantly reduce production costs, and enhances productivity.
Therefore, the present invention has realized the technological break-through of gold stamping method printing high accuracy, Low ESR, high conductivity, thick metal film RFID antenna.
Embodiment
I. material and facility
Bronzing material: the KURZAlufin KPS ordinary hot orange cold foil or the cold orange cold foil (the about 0.05 μ m of aluminum layer thickness) that adopt KURZ to produce;
Stock (substrate): adopt Brigl﹠amp; The 80g/m that Bergmeister company produces
2, single face coating art paper;
Cold wave equipment: adopt Heidelberg CD102 offset press;
Blanching equipment: adopt Bo Site FoilJet104 FBR rotary-cutting hot stamping machine, add on line formula spray and drying system.
II. the manufacturing process of embodiment and comparative example
Embodiment 1: cold wave-heavy silver process
Carry out according to Fig. 5 and cold wave-heavy silver process shown in Figure 7.
The solion of second metal: adopting concentration of silver ions is the AgNO of 1g/L
3Solution also contains Loprazolam (70%) 20mol/L, histidine 1g/L etc.
According to antenna pattern preparation shown in Figure 1; The displacement reaction time is 2min; Drying condition is: 70 ℃ of oven dry 1min.
Embodiment 2: blanching-heavy silver process
Carry out according to Fig. 6 and blanching-heavy silver process shown in Figure 8.
Antenna pattern is printed according to shown in Figure 2.Other conditions such as the solion of second metal, drying condition are identical with embodiment 1.
Comparative example 1: U.S. Pat 6320556
The aluminum antenna of making in the U.S. Pat 6320556, the aluminium lamination gross thickness is 0.05 μ m, side's resistance 2 Ω/, fineness is about 0.05mm.
Comparative example 2: Chinese patent CN1912023A
This patent adopts a kind of electrically conductive ink to print the RFID antenna, and the thickness of antenna stack is 25 μ m, and side's resistance is 0.03～0.04 Ω/, and fineness is about 0.2mm.
III. performance test
Method of measurement: standard GB/T 15717-1995 " vacuum metal thickness of coating test methods electrical resistance method ".
The antenna performance that table 2 the inventive method is made and the comparison of prior art
| Metal level gross thickness (μ m) | Side's resistance (Ω/) | Fineness (mm) | The antenna frequency range that can make | ||
| Embodiment 1 | 0.15 | 0.011 | 0.05 | All frequency ranges | |
| Embodiment 2 | 0.15 | 0.01 | 0.05 | All frequency ranges | |
| Comparative example 1 | 0.05 | 2 | 0.05 | 2.45GHz～5.8GHz | |
| Comparative example 2 | 25 | 0.03～ 0.04 | 0.2 | All frequency ranges |
All frequency ranges comprise: 2.45GHz～5.8GHz, 9～135KHz, 13.56MHz, 300M～1.2GHz, 900MHz.
By the data in the table 2, as can be seen, significantly be better than the antenna that comparative example 1,2 is made aspect square resistance, the precision with the antenna of method manufacturing of the present invention.
The main label declaration of accompanying drawing
101 stock 102UV glue
103 counterdies, 104 first metal forming or the first metal layers
104A the first metallic foil pattern 104B paper tinsel that gives up
Solution after 105 bimetallic solion 106 reactions
107 second metal levels
201 stocks, 202 PURs
203 counterdies, 204 the first metal layers or paper tinsel
104A the first metallic foil pattern 104B paper tinsel that gives up
Solution after 205 bimetallic solion 206 reactions
207 second metal levels, 208 gold stamping version or gold stamping templates
Unit (1-1): spread high viscosity glue with offset printing forme
Unit (1-2): on gold stamping module, finish unreeling and rolling
Unit (1-3): offset print unit is used for first metal forming is transferred to stock between blanket and impression cylinder
Unit (1-4): the solion layer that prints second metal with offset printing forme
Unit (1-5): water rinses out the solution on stock surface
Unit (1-6): stock is carried out drying (oven dry)
Unit (2-1): unreel
Unit (2-2): shop paper tinsel blanching
Unit (2-3): pressing is peeled off
Unit (2-4): rolling
Unit (2-5): spray solution
Unit (2-6): water dashes
Unit (2-7): dry (oven dry)
Claims (13)
1. method of making radio-frequency label antenna may further comprise the steps:
A) gold stamping step: with bronzing material stock is carried out gold stamping processing, on described stock, form the radio-frequency antenna pattern of described the first metal layer with the first metal layer;
B) displacement step: with can contacting with described the first metal layer, at least a portion of described the first metal layer is replaced as described second metal with the solion that described first metal carries out second metal of displacement reaction.
2. method according to claim 1 is characterized in that, the conductance of described second metal is higher than described first metal.
3. method according to claim 1 is characterized in that the ionic valence condition of described second metal is equal to or less than the ionic valence condition of described first metal.
4. method according to claim 1 is characterized in that, the corrosion resistance of described second metal is higher than described first metal.
5. method according to claim 1 is characterized in that, described first metal is an aluminium.
6. method according to claim 5 is characterized in that, described second metal is selected from least a in the group that is made of zinc, manganese, nickel, iron, tin, copper, silver, gold.
7. method according to claim 1 is characterized in that, described first metal is a copper.
8. method according to claim 7 is characterized in that, described second metal is selected from least a by in silver, the group that constitutes of gold.
9. method according to claim 1 is characterized in that described stock is a sheet material.
10. method according to claim 9 is characterized in that, described stock is paper or film.
11. method according to claim 1 is characterized in that, described method further comprises:
C) rinsing step: with the metal level after the liquid wash displacement reaction, so that rinse out the product and the described solution of displacement reaction.
12. radio-frequency label antenna according to each described method manufacturing of claim 1 to 11.
13. a label has radio-frequency label antenna according to claim 12.
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| CN2008100577422A CN101316001B (en) | 2008-02-14 | 2008-02-14 | Method for producing radio frequency label antenna |
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| CN2008100577422A CN101316001B (en) | 2008-02-14 | 2008-02-14 | Method for producing radio frequency label antenna |
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| CN101316001A true CN101316001A (en) | 2008-12-03 |
| CN101316001B CN101316001B (en) | 2012-07-04 |
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| US4668533A (en) * | 1985-05-10 | 1987-05-26 | E. I. Du Pont De Nemours And Company | Ink jet printing of printed circuit boards |
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