CN101736334A - Method for silvering alloy suspension wire for high-performance optical disk reading head - Google Patents
Method for silvering alloy suspension wire for high-performance optical disk reading head Download PDFInfo
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- CN101736334A CN101736334A CN201010034187A CN201010034187A CN101736334A CN 101736334 A CN101736334 A CN 101736334A CN 201010034187 A CN201010034187 A CN 201010034187A CN 201010034187 A CN201010034187 A CN 201010034187A CN 101736334 A CN101736334 A CN 101736334A
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Abstract
The invention provides a method for silvering an alloy suspension wire for a high-performance optical disk reading head, belongs to the field of metal materials, and particularly relates to a metallic functional material for electronic parts and components, which are used for high-performance optical reading equipment. The method comprises the following steps of: carrying out preprocessing such as deoiling surface, performing acid pickling to remove oxides, sensitizing surface, activating surface and the like; preparing silver salt solution and reducing solution; and silvering a silver layer on the surface of the alloy suspension wire through chemical reaction. A silvered copper wire prepared by the method can obtain good characteristics of good conductivity, weldability, high-temperature resistance, oxidation resistance and the like, and meets the operating requirements of the suspension wire for the high-performance optical reading head. The method has the advantages of no toxic substance, no problem of environmental pollution of electroplating process, no influence of uniformity of power line distribution in the electroplating process, uniform coating thickness, good adhesive force and high deposition efficiency, and suitability for large-scale industrialized production. The prepared silvered copper wire meets the application requirements of the high-quality suspension wire for a torque of the high-performance optical reading head.
Description
Technical field:
The invention belongs to metal material field, particularly a kind of electronic devices and components Metallic Functional Materials is used for high performance optical read device.
Background technology:
In optical disk system, optical read head is converted to electrical signal with data or the audio/video information of storing on the CD, is the core component in the optical disk system, is the key part of realizing that optical disc information reads.The optical head technology is the basic technology of optical disk system, and the optical head industrial relations is to the ups and downs of whole CD industry.The optical head that China enterprise is produced every year accounts for 75～80% of world wide production, reaches 3～400,000,000/year, and gross industrial output value is about 15,000,000,000～20,000,000,000.Universal day by day along with DVD estimates that the output value of following 5～10 years China's optical heads will be with about 20% speed increment.
The multidimensional torquer is the key component of high density compact disc optical read head, suspension and object lens and support thereof have been formed the moving part of torquer, its performance has determined the kinetic characteristic of torquer, as sensitivity, the linear lag, system bandwidth, coupled characteristic, stability and freedom from jamming etc., can these characteristics all directly determining optical head carry out high-quality signal read-write.Present appearance owing to the high definition fetch equipment is to the demands for higher performance of suspension.
Early stage obtained certain progress by the high performance alloys suspension that CD reading head is used, and purifies, adds technologies such as alloying element, actual effect processing such as Ce, Ni by copper product, obtained snappiness, fatigue proof suspension (CN:100500899C).Yet for obtaining performance requriementss such as high conductivity, good weldability, high temperature resistant and good tracking characteristic, highly sensitive, the further processing of alloy suspension wire is not settled properly as yet.
Summary of the invention:
The purpose of this invention is to provide a kind of environmental protection, CD reading head is with the chemical silver plating method of high performance alloys suspension efficiently.The cyanide electroplating silver method that this method is different from the past does not have toxicant, and does not have the problem of environmental pollution of electroplating technology; In addition, owing to adopt chemical process, do not have the whether even influence of electric force lines distribution, thickness of coating is even, and bonding force is good, is a kind of preparation method efficiently, is suitable for industrialized mass production.
A kind of method of silvering alloy suspension wire for high-performance optical disk reading head, mainly comprise after pre-treatment before suspension (copper alloy silk) plating, chemical silvering, the plating several aspects such as aftertreatment: processing step is as follows:
A: matrix surface pre-treatment: copper wire is joined ultrasonic oil removing cleaning in the acetone, immerse then and carry out pickling scale removal, deionized water ultrasonic cleaning afterwards in the acid solution; After the pickling copper wire is carried out sensitization and handle, sensitized solution is a stannous chloride solution, carries out activation treatment after the sensitization, and activated solution is a palladium chloride solution;
B: chemical silvering: prepare a certain amount of reductant solution and silver salt solution, the copper that the A step process is good
Silk correctly is suspended in the reductant solution, adds silver salt solution, and standing and reacting certain hour under the normal temperature finally forms on the copper wire surface and coats complete, fine and close silver;
C: plate aftertreatment: after the plating reaction, copper wire is taken out, put into deionized water and thoroughly clean under the ultrasonic wave effect, clean with dehydrated alcohol then, drying promptly obtains prepared sample later.
1, surface preparation:
A, surface degreasing: acetone ultrasonic cleaning 20 minutes, deionized water ultrasonic cleaning 10 minutes.
B, pickling remove oxide compound: copper wire was immersed in 1: 1 concentrated nitric acid solution 1～5 minute, remove the oxide compound on copper wire surface, deionized water ultrasonic cleaning then;
C, sensitization are handled: copper wire is immersed tin protochloride dilute hydrochloric acid solution (SnCl
2.H
2O:30g/L; HCl:17mL/100mL) 40～60 minutes, the deionized water ultrasonic cleaning;
D, activation treatment: copper wire is immersed Palladous chloride dilute hydrochloric acid solution (PdCl
2: 0.5g/L; HCl:17mL/100mL) 20～40 minutes, the deionized water ultrasonic cleaning;
2, chemical silvering
A, reducing solution preparation:
Testing used reductive agent is glucose solution.Under the normal temperature, take by weighing 30～60g/L glucose, 5～15g/L tartrate, 0.5～3g/L Sodium dodecylbenzene sulfonate and be dissolved in the ionized water, glass stick stirs solid is dissolved fully, about heated solution to 80 on the warm table ℃, is cooled to room temperature then.Measure 10～30ml/L ethanol with graduated cylinder then and join in the reducing solution, stir, place standby.
B, silver salt solution preparation
Under the normal temperature, take by weighing the water white AgNO of 15～40g/L
3Dissolution of crystals in deionized water, treat that crystal dissolves fully after, dropwise brown cotton-shaped post precipitation appears in dropping ammonia, continues dropping ammonia, precipitation is dissolving gradually, when solution recovers transparent again, stops dropping ammonia.Take by weighing 15～30g/L sodium hydrate solid and join in the solution, have black precipitate to produce, dropping ammonia slowly becomes clarification once more up to the complete solvent soln of precipitation then, stops dropping ammonia, stir,
C, solution mix, and react silver-plated:
The reducing solution for preparing joins in the beaker, and the copper wire of having handled well correctly is suspended in the solution, adds silver ammino solution rapidly, standing and reacting under the normal temperature, 10～60 minutes reaction times.
3, plating back aftertreatment
After a, copper wire take out in plating bath, deionized water ultrasonic cleaning rapidly, the plating bath of removal remained on surface;
B, dehydrated alcohol ultrasonic cleaning, the deionized water of removal remained on surface;
C, drying for standby.
The silver-gilt copper wire that makes as stated above can obtain good electrical conductivity, weldability and good characteristic such as high temperature resistant, anti-oxidant, meets the service requirements of high-performance optics read head with suspension.And adopt traditional silver-coating method, and the silvered film that makes on this copper alloy suspension is discontinuous, and oxide compound is easily arranged between the matrix, and bonding force is low, and electroconductibility and poorly conductive can't satisfy the service requirements of optical read head.
The invention has the advantages that: provide a kind of environmental protection, CD reading head is with the chemical silver plating method of high performance alloys suspension efficiently.Cyanide electroplating silver method different from the past does not have toxicant in this method, and does not have the problem of environmental pollution of electroplating technology, is a kind of processing method of environmental protection; In addition, owing to adopt chemical process, do not have the whether even influence of electric force lines distribution in the electroplating technology, thickness of coating is even, and bonding force is good, and the sedimentation effect height is suitable for large-scale industrial production.The silver-gilt copper wire of preparing satisfies the application requiring of high-performance optics read head torquer with high-quality suspension.
Description of drawings:
Fig. 1 is cross section (Cross-sectional) scanning electron microscope (FE-SEM) figure behind the copper wire electroplate.
Fig. 2 is the EDS power spectrum variation diagram to copper wire electroplate (Ag) layer.
Fig. 1, Fig. 2 show that the copper wire surface is pure Ag layer, and thickness is 1.5 μ m.
Embodiment:
Embodiment 1:
It is 32%～34% salpeter solution that the copper wire that acetone was cleaned is put into mass concentration, and the about 1min of pickling at room temperature uses the deionized water ultrasonic cleaning then.Copper wire is put into sensitized solution carry out the sensitization processing, sensitization 20min, sensitizing solution concentration is: SnCl
2.H
2O:30g/L; HCl:17mL/100mL.Put into activated solution after the washed with de-ionized water and carry out activation treatment, activation 10min, activation solution concentration is: PdCl
2: 0.5g/L; HCl:17mL/100mL.In a beaker, under the room temperature 3.0g glucose, 0.5g tartrate, 0.2g Sodium dodecylbenzene sulfonate are dissolved in the 90mL deionized water, about heated solution to 80 ℃, be cooled to room temperature.Measure the 10mL dehydrated alcohol with graduated cylinder then and join in the solution, be mixed with reducing solution.In another beaker the 1.5g Silver Nitrate is dissolved in the 60mL deionized water, dropwise adds ammoniacal liquor under stirring, to the precipitation that generates dissolving fully just, solution becomes gets clear.Take by weighing the 2.0g sodium hydrate solid and join in the solution, have black precipitate to produce, dropping ammonia becomes clarification once more up to the complete solvent soln of precipitation, stirs, and is mixed with silver ammino solution.The reducing solution for preparing moves in the 400mL beaker, and the copper wire of having handled well correctly is suspended in the solution, adds silver ammino solution, and standing and reacting under the room temperature behind the reaction 10min, is used washed with de-ionized water, dehydrated alcohol ultrasonic cleaning, seasoning.
Embodiment 2:
It is 32%～34% salpeter solution that the copper wire that acetone was cleaned is put into mass concentration, and the about 1min of pickling at room temperature uses the deionized water ultrasonic cleaning then.Copper wire is put into sensitized solution carry out the sensitization processing, sensitization 20min, sensitizing solution concentration is: SnCl
2.H
2O:30g/L; HCl:17mL/100mL.Put into activated solution after the washed with de-ionized water and activate, activation 10min, activation solution concentration is: PdCl
2: 0.5g/L; HCl:17mL/100mL is dissolved in 4.0g glucose, 0.7g tartrate, 0.5g polyoxyethylene glycol in the 90mL deionized water under the room temperature in a beaker, about heated solution to 80 ℃, is cooled to room temperature.Measure the 10mL dehydrated alcohol with graduated cylinder then and join in the solution, be mixed with reducing solution.In another beaker the 2.0g Silver Nitrate is dissolved in the 60mL deionized water, dropwise adds ammoniacal liquor under stirring, to the precipitation that generates dissolving fully just, solution becomes gets clear.Take by weighing the 2.0g sodium hydrate solid and join in the solution, have black precipitate to produce, dropping ammonia becomes clarification once more up to the complete solvent soln of precipitation, stirs, and is mixed with silver ammino solution.The reducing solution for preparing moves in the 400mL beaker, and the copper wire of having handled well correctly is suspended in the solution, adds silver ammino solution, and standing and reacting under the room temperature behind the reaction 20min, is used washed with de-ionized water, dehydrated alcohol ultrasonic cleaning, seasoning.
Embodiment 3:
It is 32%～34% salpeter solution that the copper wire that acetone was cleaned is put into mass concentration, and the about 1min of pickling at room temperature uses the deionized water ultrasonic cleaning then.Copper wire is put into sensitized solution carry out the sensitization processing, sensitization 20min, sensitizing solution concentration is: SnCl
2.H
2O:30g/L; HCl:17mL/100mL.Put into activated solution after the washed with de-ionized water and activate, activation 10min, activation solution concentration is: PdCl
2: 0.5g/L; HCl:17mL/100mL.In a beaker, under the room temperature 6.0g glucose, 1.0g tartrate, 0.5g Sodium dodecylbenzene sulfonate are dissolved in the 90mL deionized water, about heated solution to 80 ℃, be cooled to room temperature.Measure the 10mL dehydrated alcohol with graduated cylinder then and join in the solution, be mixed with reducing solution.In another beaker the 3.0g Silver Nitrate is dissolved in the 60mL deionized water, dropwise adds ammoniacal liquor under stirring, to the precipitation that generates dissolving fully just, solution becomes gets clear.Take by weighing the 2.0g sodium hydrate solid and join in the solution, have black precipitate to produce, dropping ammonia becomes clarification once more up to the complete solvent soln of precipitation, stirs, and is mixed with silver ammino solution.The reducing solution for preparing moves in the 400mL beaker, and the copper wire of having handled well correctly is suspended in the solution, adds silver ammino solution, and standing and reacting under the room temperature behind the reaction 15min, is used washed with de-ionized water, dehydrated alcohol ultrasonic cleaning, seasoning.
Embodiment 4:
It is 32%～34% salpeter solution that the copper wire that acetone was cleaned is put into mass concentration, and the about 1min of pickling at room temperature uses the deionized water ultrasonic cleaning then.Copper wire is put into sensitized solution carry out the sensitization processing, sensitization 20min, sensitizing solution concentration is: SnCl
2.H
2O:30g/L; HCl:17mL/100mL.Put into activated solution after the washed with de-ionized water and activate, activation 10min, activation solution concentration is: PdCl
2: 0.5g/L; HCl:17mL/100mL.In a beaker, under the room temperature 4.0g glucose, 0.7g tartrate, 0.8g ten polyoxyethylene glycol are dissolved in the 90mL deionized water, about heated solution to 80 ℃, be cooled to room temperature.Measure the 10mL dehydrated alcohol with graduated cylinder then and join in the solution, be mixed with reducing solution.In another beaker the 4.0g Silver Nitrate is dissolved in the 100mL deionized water, dropwise adds ammoniacal liquor under stirring, to the precipitation that generates dissolving fully just, solution becomes gets clear.Take by weighing the 2.0g sodium hydrate solid and join in the solution, have black precipitate to produce, dropping ammonia becomes clarification once more up to the complete solvent soln of precipitation, stirs, and is mixed with silver ammino solution.The reducing solution for preparing moves in the 400mL beaker, and the copper wire of having handled well correctly is suspended in the solution, adds silver ammino solution, and standing and reacting under the room temperature behind the reaction 20min, is used washed with de-ionized water, dehydrated alcohol ultrasonic cleaning, seasoning.
Claims (8)
1. the method for a silvering alloy suspension wire for high-performance optical disk reading head is characterized in that processing step is as follows:
A: matrix surface pre-treatment: copper wire is joined ultrasonic oil removing cleaning in the acetone, immerse then and carry out pickling scale removal, deionized water ultrasonic cleaning afterwards in the acid solution; After the pickling copper wire is carried out sensitization and handle, sensitized solution is a stannous chloride solution, carries out activation treatment after the sensitization, and activated solution is a palladium chloride solution;
B: chemical silvering: prepare a certain amount of reductant solution and silver salt solution, the copper wire that the A step process is good correctly is suspended in the reductant solution, add silver salt solution, standing and reacting certain hour under the normal temperature finally forms on the copper wire surface and coats complete, fine and close silver;
C: plate aftertreatment: after the plating reaction, copper wire is taken out, put into deionized water and thoroughly clean under the ultrasonic wave effect, clean with dehydrated alcohol then, drying promptly obtains prepared sample later.
2. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1, it is characterized in that used body material is a copper alloy, its composition weight percent is: Be:0.5%～5%, Ni:0.1%～3%, Co:0.1%～3%, Ag:0.05%～1%, Ce:0.05%～1%, all the other are copper.
3. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1, it is characterized in that: the described acid solution of steps A is a salpeter solution, and the mass concentration of salpeter solution is: 30%～45%.
4. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1 is characterized in that the described pickling time of steps A is 1～5min.
5. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1, it is characterized in that the described silver salt solution of step B prepares by following requirement: the certain density AgNO3 solution of preparation in beaker, dropping ammonia dropwise, extremely the just complete solvent soln of the precipitation that generates becomes clear, add a certain amount of alkali solid particle, produce post precipitation dropping ammonia to solution and become clear once more; Used silver nitrate solution concentration range is: 15～40g/L, the alkali solid particle that is added are a kind of in sodium hydroxide or the potassium hydroxide.
6. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1 is characterized in that the described reductive agent of step B is a kind of in glucose, formaldehyde or the hydrazine, and the concentration of reductive agent is 30～60g/L.
7. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1 is characterized in that adding tartrate, stablizer and tensio-active agent in the described reductant solution of step B; Stablizer is a kind of in dehydrated alcohol or the thiocarbamide, and tensio-active agent is a kind of in Sodium dodecylbenzene sulfonate, polyoxyethylene glycol or the gelatin.
8. the method for silvering alloy suspension wire for high-performance optical disk reading head according to claim 1 is characterized in that the described reaction times of step B is 10～60min.
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| CN2010100341879A CN101736334B (en) | 2010-01-15 | 2010-01-15 | Method for silvering alloy suspension wire for high-performance optical disk reading head |
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| CN2010100341879A CN101736334B (en) | 2010-01-15 | 2010-01-15 | Method for silvering alloy suspension wire for high-performance optical disk reading head |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560451A (en) * | 2012-02-22 | 2012-07-11 | 江苏大学 | Chemical nano-silver plating solution and preparation method thereof, and silver plating method for copper part |
| CN110670053A (en) * | 2019-10-18 | 2020-01-10 | 北京曙光航空电气有限责任公司 | Silver plating method for metal surface |
| CN112264476A (en) * | 2020-10-09 | 2021-01-26 | 安徽楚江高新电材有限公司 | Copper wire with small resistance for wind power generation motor and preparation process thereof |
-
2010
- 2010-01-15 CN CN2010100341879A patent/CN101736334B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560451A (en) * | 2012-02-22 | 2012-07-11 | 江苏大学 | Chemical nano-silver plating solution and preparation method thereof, and silver plating method for copper part |
| CN102560451B (en) * | 2012-02-22 | 2013-12-11 | 江苏大学 | Chemical nano-silver plating solution and preparation method thereof, and silver plating method for copper part |
| CN110670053A (en) * | 2019-10-18 | 2020-01-10 | 北京曙光航空电气有限责任公司 | Silver plating method for metal surface |
| CN112264476A (en) * | 2020-10-09 | 2021-01-26 | 安徽楚江高新电材有限公司 | Copper wire with small resistance for wind power generation motor and preparation process thereof |
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| CN101736334B (en) | 2011-10-12 |
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