CN103834946A - Cladding layer, communication equipment and preparation process of cladding layer - Google Patents
Cladding layer, communication equipment and preparation process of cladding layer Download PDFInfo
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- CN103834946A CN103834946A CN201210487213.2A CN201210487213A CN103834946A CN 103834946 A CN103834946 A CN 103834946A CN 201210487213 A CN201210487213 A CN 201210487213A CN 103834946 A CN103834946 A CN 103834946A
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Abstract
The embodiment of the invention provides a cladding layer, communication equipment and a preparation process of the cladding layer, and relates to the field of the communication equipment. The cladding layer is capable of resisting high temperature, high humidity and high corrosion of an environment. The cladding layer comprises a Ni layer and a Sn alloy layer, wherein the Sn alloy layer comprises the following elements by mass percent: 20% to 70% of Cu, 20% to 70% of Sn, 10% to 60% of Ni and 0% to 20% of other elements. The cladding layer can be applied to a layer cladding process of the communication equipment.
Description
Technical field
The present invention relates to communication equipment field, relate in particular to the preparation technology of a kind of coating, signal equipment and coating.
Background technology
The structure that field of wireless communications is conventional and equipment have complete machine, module, electronic device member and substrate etc.These structures and equipment need to be applied in complicated external environment sometimes, or need to carry out welding operation with other structures or equipment, or need to be applied to some electric property of self.Therefore, thus how to ensure that these communication structures or equipment can be applied in complicated external environment, have good welding property and electric property ensures that good working reliability becomes most important.
At present various for the solution of this problem, differ totally different.For example, in the surface treatment of base material, mainly contain electric property and Weldability that these several structures such as plated surface Ag/Ni, Sn/Ni or Zn/Ni alleviate the impact of extraneous complex environment and improve equipment.For Ag/Ni structure, although can solve the electricity question of base material and Anticorrosion to a certain extent, silvering unstable chemcial property, easily vulcanizes and is oxidized, and storage condition is high, and service life is short.And silver plating solution cost height is also unstable, be not easy to the management and control of cost.For Sn/Ni structure, the content of tin coating can not be lower than 99%.
Summary of the invention
The main purpose of embodiments of the invention is, the preparation technology of a kind of coating, signal equipment and coating is provided, and can bear high temperature, high humidity and the high corrosion of environment.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, the invention provides a kind of coating, comprising:
Nickel dam and tin alloy layer; Tin alloy layer comprises that mass fraction is 20% ~ 70% Cu, 20% ~ 70% Sn and 10% ~ 60% Ni, and other elements of 0 ~ 20%.
In the first possibility implementation of first aspect, described other elements do not include harmful substances.
In the first possibility implementation in conjunction with first aspect, in the second possibility implementation, described other elements do not comprise lead, cadmium, mercury and sexavalent chrome.
In conjunction with first aspect, in the third possibility implementation, the thickness of described tin alloy layer is 0.1 μ m ~ 20 μ m.
In conjunction with the third possibility implementation of first aspect or first aspect, in the 4th kind of possibility implementation, the thickness of described nickel dam is 0.1 μ m ~ 20 μ m.
In conjunction with first aspect, in the 5th kind of possibility implementation, described coating also comprises copper layer.
In conjunction with the 5th kind of possibility implementation of first aspect, in the 6th kind of possibility implementation, the thickness of described copper layer is 0.1 μ m ~ 20 μ m.
Second aspect, the invention provides a kind of signal equipment, comprising: the described coating that the embodiment of the present invention provides, described coating is arranged on the base material of described signal equipment.
The third aspect, the invention provides a kind of preparation technology of above-mentioned coating, comprising:
Step 1 a: base material is provided;
Step 2: chemical nickel plating and/or electronickelling on described base material, form nickel dam;
Step 3: eleetrotinplate alloy on described nickel dam, forms tin alloy layer.
In the first possibility implementation of the third aspect, in step 2, the thickness of the tin alloy layer of described formation is 0.1 μ m ~ 20 μ m.
In conjunction with the first possibility implementation of the third aspect or the third aspect, in the second possibility implementation of the third aspect, in step 3, the thickness of the nickel dam of described formation is 0.1 μ m ~ 20 μ m.
In conjunction with the third aspect, in the third possibility implementation of the third aspect, described step 2 comprises: electro-coppering on described base material, forms copper layer; Chemical nickel plating and/or electronickelling on described copper layer, form nickel dam.
In conjunction with the third possibility implementation of the third aspect, in the 4th kind of possibility implementation, the thickness of described copper layer is formed as 0.1 μ m ~ 20 μ m.
The preparation technology of coating, signal equipment and coating that the embodiment of the present invention provides, on base material, be disposed with nickel dam and tin alloy layer, adopt tin alloy layer that anti-oxidant, the erosion-resisting ability of coating is improved, can bear high temperature, high humidity and the high corrosion of environment, and the cost of coating entirety declines, comprise that in addition the coating of tin alloy layer also has good welding effect.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The coating structure schematic diagram that Fig. 1 provides for one embodiment of the invention;
The coating structure schematic diagram that Fig. 2 provides for another embodiment of the present invention;
Preparation technology's schema of the coating that Fig. 3 provides for one embodiment of the invention;
Preparation technology's schema of the coating that Fig. 4 provides for another embodiment of the present invention;
Preparation technology's schema of the coating that Fig. 5 provides for the present invention's one specific embodiment;
Fig. 6 is the coating interface SEM figure of one embodiment of the invention;
Fig. 7 is the high temperature resistant test pattern of one embodiment of the invention;
Fig. 8 is the solidity to corrosion test pattern of one embodiment of the invention;
Fig. 9 a-9c is the weldability test pattern of one embodiment of the invention.
embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Below in conjunction with accompanying drawing, the preparation technology of embodiment of the present invention coating, signal equipment and coating is described in detail.
The embodiment of the present invention provides a kind of coating 20, and as described in Figure 1, this coating 20 comprises: nickel dam 201 and tin alloy layer 202.This coating 20 can be arranged on base material 10, and base material 10 can be the materials such as aluminium, copper, tinplate.Be understandable that, the embodiment of the present invention is not done concrete restriction to base material, and those skilled in the art can be arranged at coating provided by the invention on other base materials according to common practise or common technology means.Tin alloy layer 202 is formed by the alloy of tin and other elements.Preferably, tin alloy layer 202 can comprise the elements such as tin, copper, nickel.Certainly, the embodiment of the present invention is not construed as limiting this, also can select other elements outside copper, nickel.
Preferably, described tin alloy layer 202 comprises that mass fraction is 20% ~ 70% Cu, 20% ~ 70% Sn and 10% ~ 60% Ni, and other elements of 0 ~ 20%.For example, in this tin alloy layer 202, the mass content of Cu can be 30%, 40%, 50%, 60%, 65% etc., and the mass content of Sn can be 25%, 30%, 40%, 50%, 60% etc., and the mass content of Ni can be 15%, 20%, 30%, 40%, 50% etc.Except Cu, the Sn and Ni of above-mentioned content, tin alloy layer 202 also can comprise other elements of residual mass umber.
Preferably, nickel dam 201 shown in can comprise electroless nickel layer 2011 and electroless nickel layer 2012.Electroless nickel layer 2011 ensures the compactness that coating is good, and electroless nickel layer 2012 improves the speed of nickel plating, sets gradually electroless nickel layer 2011 and electroless nickel layer 2012 on base material, makes coating 20 reach better technological effect.
The coating that the embodiment of the present invention provides, on base material 10, be disposed with nickel dam 201 and tin alloy layer 202, in tin alloy layer owing to adding the element such as copper, nickel, significantly improve anti-oxidant and erosion-resisting ability with respect to pure plating silver layer and eleetrotinplate layer, again because the fusing point that makes tin alloy improves, can avoid the serious dissolving of the surperficial tin that coating causes in welding process, ensure the planeness of welding rear surface.The cost of coating 20 is only equivalent to electroplate 1/3 of silver layer.To sum up, the coating 20 that the embodiment of the present invention provides can bear high temperature, high humidity and the high corrosion of environment, and the holistic cost of coating 20 declines, and comprises that in addition the coating 20 of tin alloy layer 202 is also owing to having good welding effect compared with high fusing point.
In addition, in a preferred embodiment provided by the invention, other elements in described tin alloy layer 202 do not include harmful substances, for example concrete, and described other elements do not comprise lead, cadmium, mercury and sexavalent chrome etc.Certainly, be understandable that, objectionable impurities is not limited to illustrational element herein.
In order better to realize anti-oxidant, the anticorrosive and high welding performance of coating provided by the invention, in another embodiment provided by the invention, the thickness of tin alloy layer 202 is 0.1 μ m ~ 20 μ m, and the thickness of nickel dam 201 is 0.1 μ m ~ 20 μ m.For example, the thickness of this tin alloy layer 202 can be 0.5 μ m, 2 μ m, 7 μ m, 10 μ m, 15 μ m, 19 μ m etc.The thickness of nickel dam 201 can be 0.5 μ m, 2 μ m, 7 μ m, 10 μ m, 15 μ m, 19 μ m etc.Further preferred, the thickness range of described tin alloy layer 202 can be 0.1 μ m ~ 10 μ m, and the thickness of nickel dam 201 is 1 μ m ~ 15 μ m.
Optionally, for the base material that has anti-salt fog requirement, in another embodiment, coating 20 can further comprise copper layer 203 as described in Figure 2, and this copper layer 203 can be set in turn on base material 10 with above-mentioned nickel dam 201 and tin alloy layer 202.Preferably, the thickness of copper layer 103 is 0.1 μ m ~ 20 μ m.For example, the thickness of this copper layer 202 can be 0.5 μ m, 2 μ m, 7 μ m, 10 μ m, 15 μ m, 19 μ m etc.Further preferred, the thickness range of described copper layer 202 can be 1 μ m ~ 15 μ m.The coating 20 that has added copper layer 203 has higher fume resistance energy.
The above-mentioned coating providing with the embodiment of the present invention is corresponding, and the embodiment of the present invention also provides a kind of signal equipment, and this signal equipment comprises the coating 20 that the embodiment of the present invention provides, and this coating 20 is arranged on the base material 10 of described signal equipment.Explanation to coating 20 refers to previous embodiment, repeats no more herein.
The signal equipment that the embodiment of the present invention provides, on signal equipment base material 10, be provided with coating 20, coating 20 comprises nickel dam 201 and tin alloy layer 202, be set in turn on base material 10, adopt tin alloy layer 202 that anti-oxidant, the erosion-resisting ability of signal equipment is improved, can bear high temperature, high humidity and the high corrosion of environment, and the cost of letter Whole Equipment declines, signal equipment has good welding effect and electric property because of coating 20 in addition.
The above-mentioned coating providing with the embodiment of the present invention is corresponding, and the embodiment of the present invention also provides the preparation technology of this coating, and as shown in Figure 3, preparation technology comprises:
Step 1 a: base material is provided.
This step comprises the necessary clean to base material and surface activation process, with the plating in aspect subsequent step.For example, can clean by ultra-sonic generator the greasy dirt of substrate surface, then by washing and alkali cleaning etc., base material further be cleaned.For the coating that makes to form on base material is more firm, for example can process to remove the zone of oxidation that base material table is showed off by sink zinc on substrate surface, make substrate surface form active coating.Be understandable that, those skilled in the art also can adopt additive method to clean or surface activation process base material according to common practise or common technology means, and the present invention does not do concrete restriction to this.
Step 2: chemical nickel plating and/or electronickelling on described base material, form nickel dam.
Can adopt separately in this step nickel chemical plating technology on base material, to form nickel dam, or adopt separately electronickelling technique on base material, to form coating, or the two forms nickel dam on base material can to adopt chemical nickel plating and electronickelling.For example, optional, can adopt nickel chemical plating technology on base material, to form after a nickel dam, adopt electronickelling technique to form another nickel dam on this nickel dam surface.Nickel chemical plating technology ensures the good compactness of coating, and electronickelling technique improves the speed of nickel plating, and the two is combined with and can reaches better technological effect.
Preferably, in the process of above-mentioned chemical nickel plating or electronickelling, repeatedly plating.In plating process, coating surface easily produces reducing gas, affects the formation effect of coating, therefore can after a plating, clean to remove surface reduction gas, and then carry out plating for the second time.By that analogy, thus ensure compactness and the thickness of coating.
Wherein, the thickness of coating of nickel dam can be carried out Comprehensive Control and adjustment by the processing condition such as time, current density of the concentration of plating solution, plating or electroless plating.Preferably, in order better to realize anti-oxidant, the anticorrosive and high welding performance of coating provided by the invention, the thickness of the nickel dam forming in step 2 is 0.1 μ m ~ 20 μ m.For example, the thickness of nickel dam can be 0.5 μ m, 2 μ m, 7 μ m, 10 μ m, 15 μ m, 19 μ m etc.Further preferred, the thickness of nickel dam is 1 μ m ~ 15 μ m.Certainly the embodiment of the present invention is not done concrete restriction to this, and those skilled in the art can be formed as other thickness by nickel dam according to common practise or common technology means.
Step 3: eleetrotinplate alloy on described nickel dam, forms tin alloy layer.
Tin alloy layer comprises that mass fraction is 20% ~ 70% Cu, 20% ~ 70% Sn and 10% ~ 60% Ni, and other elements of 0 ~ 20%.The explanation of tin alloy layer specifically can, with reference to aforesaid coating embodiment, be repeated no more herein.
Similar with Ni-Speed, in this step, also can adopt repeatedly plating on nickel dam, to form tin alloy layer to ensure the compactness of coating.
Wherein, the thickness of coating of tin alloy layer can be carried out Comprehensive Control and adjustment by the processing condition such as time, current density of the concentration of plating solution, plating.Preferably, in order better to realize anti-oxidant, the anticorrosive and high welding performance of coating provided by the invention, the thickness of the tin alloy layer forming in step 3 is 0.1 μ m ~ 20 μ m.For example, the thickness of tin alloy layer can be 0.5 μ m, 2 μ m, 7 μ m, 10 μ m, 15 μ m, 19 μ m etc.Further preferred, the thickness of tin alloy layer is 0.1 μ m ~ 10 μ m.Certainly the embodiment of the present invention is not done concrete restriction to this, and those skilled in the art can be formed as other thickness by tin alloy layer according to common practise or common technology means.
Finally, clean, dry to remove plating solution to having formed the base material of coating, then high bake is so that coating structure is more firm, tight.Can obtain coating of the present invention.
The technique for preparing coating that the embodiment of the present invention provides, on base material, form successively nickel dam and tin alloy layer, in tin alloy layer owing to adding the element such as copper, nickel, significantly improve anti-oxidant and erosion-resisting ability with respect to pure plating silver layer and eleetrotinplate layer, again because the fusing point that makes tin alloy improves, can avoid the serious dissolving of the surperficial tin that coating causes in welding process, ensure the planeness of welding rear surface.The cost of coating is only equivalent to electroplate 1/3 of silver layer.To sum up, high temperature, high humidity and high corrosion that the technique for preparing coating that the embodiment of the present invention provides can make the coating forming bear environment, and preparation cost declines, and comprises that in addition the coating of tin alloy layer is also owing to having good welding effect compared with high fusing point.
Optionally, for the base material that has anti-salt fog requirement, in another embodiment, as shown in Figure 4, step 2 specifically can comprise:
Step 2a: electro-coppering on described base material, forms copper layer;
Step 2b: chemical nickel plating and/or electronickelling on described copper layer, form nickel dam.
Wherein, the thickness of coating of copper layer can be carried out Comprehensive Control and adjustment by the processing condition such as time, current density of the concentration of plating solution, plating.Preferably, in order better to realize anti-oxidant, the anticorrosive and high welding performance of coating provided by the invention, the thickness of the copper layer forming in step 2a is 0.1 μ m ~ 20 μ m.For example, the thickness of copper layer can be 0.5 μ m, 2 μ m, 7 μ m, 10 μ m, 15 μ m, 19 μ m etc.Further preferred, the thickness of copper layer is 1 μ m ~ 15 μ m.Certainly the embodiment of the present invention is not done concrete restriction to this, and those skilled in the art can be formed as other thickness by copper layer according to common practise or common technology means.
The nickel coating preparation technology that in step 2b, the formation technique of nickel dam can provide with reference to the present invention in last embodiment repeats no more herein.
Coating provided by the invention and preparation technology thereof as shown in Figure 5, provide a specific embodiment to be elaborated below in order better to illustrate.
Embodiment 1:
Schema as shown in Figure 4, first carries out visual examination to parts base material, to ensure that base material does not have the defects such as serious greasy dirt, scrap metal, burr, scuffing, paint, printing ink layer and corrosion and oxide skin; Again base material is put into rinse bath, first carry out supersound process (20KHz ~ 60KHz with ultra-sonic generator, 5s ~ 2500s), remove the greasy dirt of substrate surface, ultrasonic owing to thering is concussion and sound cavitation effect, can make substrate surface be subject to the impact of pulse liquid, this impact is pulse shock, can form High Temperature High Pressure microbubble point and the microjet of moment, make the greasy dirt that substrate surface adheres to be impacted or become lax, be beneficial to follow-up alkali lye scrubbing; And then wash; Immerse again afterwards in certain density alkaline solution (NaOH, 45 ~ 300g/L, 20 ~ 60 DEG C, 5s ~ 1500s) and carry out further dirt.
After parts surface scrubbing, sink zinc pre-treatment (processing 1 ~ 4 time) on its surface, to remove the zone of oxidation of substrate surface, make its surface active form active coating; Nickel layer on this basis again, first chemical nickel plating then electronickelling forms the nickel dam of 1 μ m ~ 5 μ m, and then zinc-plated alloy layer forms the tin alloy layer of 1 μ m ~ 5 μ m.Wherein tin alloy layer comprises 30% Cu, 40% Sn and 25% Ni.The thickness of above-mentioned coating is by the technique such as time, current density of concentration, plating or the electroless plating of plating solution, Comprehensive Control adjustment.
Finally parts are cleaned to (cleaning 1 ~ 5 time), remove the plating solution that above operation stays at parts surface; Dry and remove surperficial moisture content again, then high bake that coating is organized is more firm, fine and close.Get final product to such an extent that there is the functional coating of coating structure described in the present invention and performance.
For the performance of coating provided by the invention is better described, coating is carried out to following performance test.
(1) Coating composition test
SEM(scanning electronmicroscope, scanning electronic microscope have been carried out in coating provided by the invention interface) test, as shown in Figure 6.On the aluminium base of parts, be followed successively by electroless nickel layer, electroless nickel layer and tin alloy layer.
(2) high temperature resistant test
As shown in table 1, coating has been carried out to high temperature resistant test.
Test that table 1 is high temperature resistant
| Test condition | Test result |
| 260℃、30min | There is not the bad phenomenon such as bubble, pore, flavescence in surface |
Fig. 7 a, 7b show respectively the coating before and after test, can find out high temperature resistant test from Fig. 7 b, and the bad phenomenon coating such as bubble, pore, flavescence do not appear in coating table surface, illustrate that coating provided by the invention has good resistance to elevated temperatures.
(3) solidity to corrosion test
As shown in table 2, coating has been carried out to solidity to corrosion test.
Table 2 solidity to corrosion test (salt-fog test)
Fig. 8 a, 8b show respectively the coating before and after test, can find out smoke test from Fig. 8 b, and coating is surperficial light discolouration jaundice only, does not occur other remarkable variable color and signs of corrosion, illustrates that coating provided by the invention has good corrosion resisting property.
(4) weldability test
As described in Table 3, coating is carried out to weldability test, be also wettability test.Certain product with coating provided by the invention is carried out to weldability test.As shown in Fig. 9 a, the long 76mm of this product, wide 25mm, has carried out three apertures thereon and has printed tin test, and hole distance of center circle is 10mm, and bore dia is 6.5mm, and hole depth is 0.2mm.
Table 3 weldability test (wettability test)
Fig. 9 b prints the diagram after tin for adopting unleaded tin bar (or tin cream) Sn96.5Ag3.0Cu0.5 to carry out aperture, and Fig. 9 c prints the diagram after tin for employing has slicker solder bar (or tin cream) Sn63Pb37 to carry out aperture.Can find out from diagram, print after tin at aperture, not occur scolding tin gathering, contracting tin, nonwetting, wetting unequal bad phenomenon, meet the requirement of J-STD-002A (L) electronic welding standard.Therefore, coating provided by the invention has good welding effect.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (13)
1. a coating, is characterized in that, comprising:
Nickel dam and tin alloy layer;
Tin alloy layer comprises that mass fraction is 20% ~ 70% Cu, 20% ~ 70% Sn and 10% ~ 60% Ni, and other elements of 0 ~ 20%.
2. coating according to claim 1, is characterized in that, described other elements do not include harmful substances.
3. coating according to claim 2, is characterized in that, described other elements do not comprise lead, cadmium, mercury and sexavalent chrome.
4. coating according to claim 1, is characterized in that, the thickness of described tin alloy layer is 0.1 μ m ~ 20 μ m.
5. according to the coating described in claim 1 or 4, it is characterized in that, the thickness of described nickel dam is 0.1 μ m ~ 20 μ m.
6. coating according to claim 1, is characterized in that, described coating also comprises copper layer.
7. coating according to claim 6, is characterized in that, the thickness of described copper layer is 0.1 μ m ~ 20 μ m.
8. a signal equipment, is characterized in that, comprising:
Coating described in claim 1-7 any one, described coating is arranged on the base material of described signal equipment.
9. a preparation technology for the coating described in claim 1-7 any one, is characterized in that, comprising:
Step 1 a: base material is provided;
Step 2: chemical nickel plating and/or electronickelling on described base material, form nickel dam;
Step 3: eleetrotinplate alloy on described nickel dam, forms tin alloy layer.
10. the preparation technology of coating according to claim 9, is characterized in that,
In step 3, the thickness of the tin alloy layer of described formation is 0.1 μ m ~ 20 μ m.
11. according to the preparation technology of the coating described in claim 9 or 10, it is characterized in that,
In step 2, the thickness of the nickel dam of described formation is 0.1 μ m ~ 20 μ m.
The preparation technology of 12. coating according to claim 9, is characterized in that, described step 2 comprises:
Electro-coppering on described base material, forms copper layer;
Chemical nickel plating and/or electronickelling on described copper layer, form nickel dam.
The preparation technology of 13. coating according to claim 12, is characterized in that,
The thickness of described copper layer is formed as 0.1 μ m ~ 20 μ m.
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| CN201210487213.2A CN103834946B (en) | 2012-11-26 | 2012-11-26 | The preparation technology of coating, signal equipment and coating |
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| CN105088289A (en) * | 2015-08-12 | 2015-11-25 | 深圳市环翔精饰工业有限公司 | Method for electroplating or deplating aluminum-based copper-inlaid workpiece |
| CN105132960A (en) * | 2015-08-12 | 2015-12-09 | 深圳市环翔精饰工业有限公司 | Method for preventing solder paste from diffusing during wettability detecting of tin-electroplated workpiece |
| CN105350046A (en) * | 2015-10-23 | 2016-02-24 | 衢州顺络电路板有限公司 | Circuit board for replacing golden metal strips and manufacturing method of circuit board |
| CN105870570A (en) * | 2016-04-01 | 2016-08-17 | 苏州欣天新精密机械有限公司 | Preparation method of composite material resonant column |
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| JP2004263304A (en) * | 2004-03-19 | 2004-09-24 | Tocalo Co Ltd | Ni BASED ALLOY MEMBER, AND PRODUCTION METHOD THEREFOR |
| CN1940137A (en) * | 2001-01-31 | 2007-04-04 | 同和矿业株式会社 | Heat resistant film, its manufacturing method, and electrical and electronic parts |
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| CN1455829A (en) * | 2001-01-19 | 2003-11-12 | 古河电气工业株式会社 | Metal-plated material and method for preparation, and electric and electronic parts using same |
| CN1940137A (en) * | 2001-01-31 | 2007-04-04 | 同和矿业株式会社 | Heat resistant film, its manufacturing method, and electrical and electronic parts |
| JP2004263304A (en) * | 2004-03-19 | 2004-09-24 | Tocalo Co Ltd | Ni BASED ALLOY MEMBER, AND PRODUCTION METHOD THEREFOR |
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| CN105088289A (en) * | 2015-08-12 | 2015-11-25 | 深圳市环翔精饰工业有限公司 | Method for electroplating or deplating aluminum-based copper-inlaid workpiece |
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| CN105350046A (en) * | 2015-10-23 | 2016-02-24 | 衢州顺络电路板有限公司 | Circuit board for replacing golden metal strips and manufacturing method of circuit board |
| CN105870570A (en) * | 2016-04-01 | 2016-08-17 | 苏州欣天新精密机械有限公司 | Preparation method of composite material resonant column |
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| Publication number | Publication date |
|---|---|
| CN103834946B (en) | 2016-03-30 |
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