CN109777991A - A kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique - Google Patents
A kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique Download PDFInfo
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- CN109777991A CN109777991A CN201910225083.7A CN201910225083A CN109777991A CN 109777991 A CN109777991 A CN 109777991A CN 201910225083 A CN201910225083 A CN 201910225083A CN 109777991 A CN109777991 A CN 109777991A
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Abstract
The invention discloses a kind of electric leads bonding corrosion-resistant high-damping silver alloy and its techniques.According to weight percent, the ingredient of the alloy are as follows: Mn:20.0-25.0wt.%, Pd:1.0-1.5wt.%, Ni:2.0-3.0wt.%, Fe:1.0-2.0wt.%, Ru:0.2-0.3wt.%, Ge:1.2-1.5wt.%, Mo:0.4-0.6wt.%, Se:0.1-0.2wt.%, surplus are silver.The material provides a kind of silver-colored bonding line for encapsulation for the electronic device used in the environment of serious vibration, status that can be undesirable efficiently against existing silver-colored bonding line damping capacity.Silver-colored bonding line not only can be effectively avoided due to vibrating bring fatigue rupture in the implementation and industrialization of the material, while can also obtain the economic benefit of great social benefit.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of silver alloy.
Background technique
Industrial vibration bring noise pollution, which has become, to endanger greatly the one of the mankind, and and water pollution, atmosphere pollution one
It rises and is seen as worldwide three main Environmental Problems.There are many source of vibration and noise, and most important type is: (1)
The rotation of machinery itself or a part of part bring abnormal vibrations and noise due to the defect of the loss of assembling and bearing;
(2) a large amount of kinetic energy is converted to vibration and noise in a short time when object is impacted;(3) due to natural frequency of object and outside
The frequency of vibration is added to have resonance caused by coincidence;(4) sinuous flow that the fluid of high-speed motion encounters barrier and generates will lead to vibration
Dynamic and noise.
Vibration in mechanical structure can cause serious broadband random vibration and noisy environment, can also excitation structure and electricity
The formant of control device device.Thus, so that mechanical structure fatigue failure occurs and dynamic buckling is fixed, can make when serious
Electronic control equipment precision is reduced and is broken down.In aerospace field, the ground flying of rocket and aircraft test failure
One third is related with vibration.In addition, harm caused by the vibration as caused by earthquake is even more well-known.Noise can be brought to people
Physiologically with psychological harm, mainly hearing damage, reduces cardiovascular function and influence the nervous system of people.Thus existing
Foundry industry and transportation must fundamentally from technology, economy and effect etc. be subject to choosing comprehensively and solve vibration and
Noise.
All harm caused by vibration and noise can be solved by reducing the amplitude of material or structure,
Namely reducing vibration is the essential measure for reducing noise.It fundamentally gets on very well, the bad damping capacity of structural material is to cause
Vibration brings the major reason of serious harm.Damping material is the material that solid mechanical vibrational energy is changed into thermal energy and is dissipated,
It is mainly used for vibration and noise control.In order to improve the damping capacity of structure, structural material and damping material can be used simultaneously
In structure design, i.e., is met with stresses with structural material and generate damping action with damping material.Structural material and damping material
Synergy can make entire mechanical structure generate damping action outstanding to reach control vibration and reduce the target of noise.
Most important two types are organic damping material and alloy damping material in damping material.Organic damping material by
In mechanical property is low and non-refractory the disadvantages of and it cannot function as structural member to be designed.Damping alloy has excellent machinery
Performance and damping vibration attenuation performance can be directly used in structural vibration reduction design when Machine Design and not have to additional others and subtract
Vibration means.Damping alloy has multiple kinds, and the damping alloy of different cultivars has different mechanical property and damping capacity.
Apply at present it is more be manganese base and copper-based damping alloy, but they are non-ferrous metals and processing technology is cumbersome.Base
In aluminium base, magnesium-based and iron-based damping alloy are due to having a variety of excellent physical properties, and mechanical property and damping capacity are gradually
Start to occupy leading position.
In recent years, the quality of the Alloy Materials in China, performance, green metallurgical level are obviously improved, Alloy Materials
Industry development also for China's industrial repositioning upgrading provide new opportunity.Currently, also just in field of new materials in world wide
Sound vertical industry cooperative mechanism is established, and accelerates new material in the application and popularization of industrial circle.It is contemplated that not
In the industrialization fast development process come, damping alloy will be obtained in vibration damping, some high-tech sectors such as noise reduction and electromagnetic shielding
More wide application.Thus, high-performance is developed, the New Damping alloy of high-tech and high-quality will become current main side
To.
Summary of the invention
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of electric leads bonding corrosion-resistant high-damping silver
Alloy and its technique.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique.By weight percentage, the group of alloy becomes
Mn:20.0-25.0wt.%,Pd:1.0-1.5wt.%,Ni:2.0-3.0wt.%,Fe:1.0-2.0wt.%,Ru:0.2-0.3wt.%,
Ge:1.2-1.5wt.%, Mo:0.4-0.6wt.%, Se:0.1-0.2wt.%, surplus are silver.
A kind of above-mentioned electric leads bonding is with corrosion-resistant high-damping silver alloy and its technique, including following smelting step: will
As above the raw material matched melting in electric induction furnace, wherein active or Volatile Elements are added in the form of intermediate alloy;It is molten
It is protected during refining using graphite crucible and argon gas；Crucible forms alloy melt after being heated to 1000-1100 degree, and utilizes electromagnetism
Agitation effects are sufficiently stirred 15 minutes or so;Alloy melt is cast to after 1000 degree of heat preservations stand 15 minutes waterglass or
It carries out being cast as rodlike (diameter 50-60mm) in graphite jig.
A kind of above-mentioned electric leads bonding is with corrosion-resistant high-damping silver alloy and its technique, including following procedure of processing: (1)
Rotary blooming processing, diameter contracting are taken out and are carried out in the cogging of first time after being heated to 500-600 degree in ingot material vacuum drying oven
Then it is cooling to carry out room temperature after vacuum 500-600 degree is tempered 1 hour by 5-8%.(2) multi-pass is swaged, and carries out room temperature to bar
Under processing of swaging, diameter contracting 5-8% per pass will carry out vacuum recrystallization annealing 1 hour of 500-600 degree after every two passage
And furnace cooling, it so repeats to reach 1-2mm until final diameter of rod.(3) wire drawing of multi-pass carries out bar material more
The room temperature wire drawing of passage, per pass diameter contracting 5-6% will carry out the recrystallization annealing 1 hour of 500-600 degree after every two passage simultaneously
Furnace cooling so repeats to reach required billon bond wire diameter until final silk material diameter.(4) at last heat
Reason will be provided with silver-colored bonding line 4 hours of timeliness and furnace cooling under 400-420 degree of final size.
Compared with prior art, the invention has the following beneficial effects:
(1) wire bonding is low in cost to account for packing forms multifarious features in Electronic Packaging field due to technical maturity
There is dominant position.The characteristics of gold bonding wire is due to corrosion resistance and good and high reliablity, but due to involving great expense only
It is widely used in mid- to high-end product.Due to its high hardness, bonding when, is easy to cause chip to damage to copper bonding line, and non-hermetically sealed
The shortcomings that being easily corroded in the environment of property and the product for being only used for low and middle-end.In comparison, silver-colored bonding line is in addition to excellent
Outside elegant heating conduction and stability, due also to there is cost factor appropriate and start gradually to apply in microelectronics Packaging.
Semiconductor product will be subjected to very big vibration for vibrating bigger occasion, these vibrate the key so that in semiconductor equipment
Zygonema cracking caused by pad vibration and failure, seriously reduce service life of equipment.Silver-colored bonding line resistance existing at present
Damping properties do not protrude, and just face equipment after packaging due to failure caused by vibrating.This patent is exactly to solve existing silver
A kind of materialogy solution that the damping capacity of bonding line is insufficient and proposes.
(2) high-damping silver bonding wire material belongs to silver-colored Mn series alloy, and the damping mechanism in microstructure is from suitable
Twin boundary is deformed in material by external force in the antiferromagnetic fct formed after magnetic-antiferromagnetic transition and fcc-fct martensitic traoformation
Movement and bring energy dissipation in the process.Substantially, the silver-colored manganese alloy solid solution of fcc structure is only greater than in manganese content
70wt% or more Shi Caihui is due to Martensite temperature spontaneous carry out martensite transfor mation at room temperature higher than room temperature.However, when silver closes
In gold manganese content be higher than 30wt% after casting flaw clearly, the serious quality for reducing final products.Manganese in this patent
Content is controlled in 20-25wt%, thus the composition alloy at room temperature can not spontaneous carry out martensite transfor mation.Since fcc phase exists
Spinodal decomposition can occur between 400-420 degree, the uniform solid solution of Initial Composition can generate the microcosmic area of rich manganese due to unstability
Domain (manganese content is greater than 70wt%).As it can be seen that the region Fu Meng after spinodal decomposition in the alloy just has generates horse at room temperature
The ability of family name's body phase transformation.Broadly, then the silver-colored manganese alloy of this patent is existed by being cooled to fcc phase state after alloy melting
Spinodal decomposition (including due to caused by paramagnetic-antiferromagnetic transition) Fu Meng afterwards occurs for (1 hour of 400-420 degree) under aging technique
The martensitic traoformation (fcc-fct) in region.The martensite transformation temperature in silver manganese alloy region Fu Meng after timeliness is 80-90
Degree, thus the alloy can generate the maximum temperature of damping no more than the temperature section after Electronic Packaging.This material
Micro Instructional Design principle be this patent silver manganese base high-damping alloy established structure basis.
(3) alloy has extremely excellent casting character, and the temperature being completely melt maintains 850-890 degree, fusing temperature
Degree range can achieve 100-120 degree.Passing through multiple drawing handle, after recrystallization annealing and final timeliness, which can be with
Reach the mechanical property of conventional silver bonding line: elasticity modulus 92-105GPa, yield strength 128-132MPa, tensile strength
For 170-180MPa, elongation percentage 14-15%.In addition, the material also has very excellent damping capacity: SDC=21-24%, and
The SDC of conventional silver bonding line is less than 5%.While guaranteeing that silver-colored bonding line has enough mechanical strengths, moreover it is possible to efficiently against vibration
Dynamic bring harm.
(4) faying face of traditional silver-colored bonding line and device in moist environment and higher can generate at use temperature
The intermetallic compound of amount is easy to produce electrochemical corrosion under weak acid and neutral environment and forms Interface Crack.Thus, it is traditional
Application of the silver-colored bonding line in the electronic device non-fully encapsulated receives serious restriction.The novel silver of present patent application closes
Gold can reduce final silver-colored bonding line interface compound crystal boundary electricity due to being added to the beneficial elements such as Pd, Ru and Mo in the base
Position, and then slowed down the electrochemical corrosion of silver-colored bonding line.In addition, addition Se and Ni is conducive to form densification on silver-colored bonding line surface
Passivation layer, improve the anticorrosive and oxidation resistent susceptibility of silver-colored bonding line while reducing the corrosion such as vulcanization and oxidation.In room
Illustrated after 200 hours according to the corrosion rate of weightlessness characterization in the lower 0.1mol/L sodium sulfide solution of temperature, the corrosion rate of the material
For 0.05-0.08mg/cm2, reached and the equivalent index of common gold thread corrosive nature.Since the silver bonding line is with excellent
Corrosion resistance occurs losing due to bonding line caused by corroding in being encapsulated into semi-enclosed electronic device using no after 5 years
Effect problem.The alloy can be produced using traditional equipment, and processing method is simple and efficient.Not only contribute to industrial life
It produces, moreover it is possible to solve to obtain great market value while industry problems again.
Specific embodiment
Embodiment 1
A kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique.By weight percentage, the group of alloy becomes
Mn:20.0wt.%,Pd:1.0wt.%,Ni:2.0wt.%,Fe:1.0wt.%,Ru:0.2wt.%,Ge:1.2wt.%,Mo:
0.4wt.%, Se:0.1wt.%, surplus are silver.
A kind of above-mentioned electric leads bonding is with corrosion-resistant high-damping silver alloy and its technique, including following smelting step: will
As above the raw material matched melting in electric induction furnace, wherein active or Volatile Elements are added in the form of intermediate alloy;It is molten
It is protected during refining using graphite crucible and argon gas；Crucible forms alloy melt after being heated to 1000-1100 degree, and utilizes electromagnetism
Agitation effects are sufficiently stirred 15 minutes or so;Alloy melt is cast to after 1000 degree of heat preservations stand 15 minutes waterglass or
It carries out being cast as rodlike (diameter 50-60mm) in graphite jig.
A kind of above-mentioned electric leads bonding is with corrosion-resistant high-damping silver alloy and its technique, including following procedure of processing: (1)
Rotary blooming processing, diameter contracting are taken out and are carried out in the cogging of first time after being heated to 500-600 degree in ingot material vacuum drying oven
Then it is cooling to carry out room temperature after vacuum 500-600 degree is tempered 1 hour by 5-8%.(2) multi-pass is swaged, and carries out room temperature to bar
Under processing of swaging, diameter contracting 5-8% per pass will carry out vacuum recrystallization annealing 1 hour of 500-600 degree after every two passage
And furnace cooling, it so repeats to reach 1-2mm until final diameter of rod.(3) wire drawing of multi-pass carries out bar material more
The room temperature wire drawing of passage, per pass diameter contracting 5-6% will carry out the recrystallization annealing 1 hour of 500-600 degree after every two passage simultaneously
Furnace cooling so repeats to reach required billon bond wire diameter until final silk material diameter.(4) at last heat
Reason will be provided with silver-colored bonding line 4 hours of timeliness and furnace cooling under 400-420 degree of final size.
The alloy has extremely excellent casting character, and the temperature being completely melt maintains 860 degree, and fusion temperature range can
To reach 102 degree.Passing through multiple drawing handle, after recrystallization annealing and final timeliness, which can achieve conventional silver key
The mechanical property of zygonema: elasticity modulus 95GPa, yield strength 129MPa, tensile strength 175MPa, elongation percentage 14%.
In addition, the material also has very excellent damping capacity: SDC=21%, and the SDC of conventional silver bonding line is less than 5%.Guaranteeing
While silver-colored bonding line has enough mechanical strengths, moreover it is possible to efficiently against vibration bring harm.0.1mol/L at room temperature
Illustrated after 200 hours according to the corrosion rate of weightlessness characterization in sodium sulfide solution, the corrosion rate of the material is 0.06mg/cm2,
Reach and the equivalent index of common gold thread corrosive nature.Since the silver bonding line has excellent corrosion resistance, encapsulating
Occurred into semi-enclosed electronic device using no after 5 years due to bonding line Problem of Failure caused by corroding.
Embodiment 2
A kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique.By weight percentage, the group of alloy becomes
Mn:25.0wt.%,Pd:1.5wt.%,Ni:3.0wt.%,Fe:2.0wt.%,Ru:0.3wt.%,Ge:1.5wt.%,Mo:
0.6wt.%, Se:0.2wt.%, surplus are silver.
A kind of above-mentioned electric leads bonding is with corrosion-resistant high-damping silver alloy and its technique, including following smelting step: will
As above the raw material matched melting in electric induction furnace, wherein active or Volatile Elements are added in the form of intermediate alloy;It is molten
It is protected during refining using graphite crucible and argon gas；Crucible forms alloy melt after being heated to 1000-1100 degree, and utilizes electromagnetism
Agitation effects are sufficiently stirred 15 minutes or so;Alloy melt is cast to after 1000 degree of heat preservations stand 15 minutes waterglass or
It carries out being cast as rodlike (diameter 50-60mm) in graphite jig.
A kind of above-mentioned electric leads bonding is with corrosion-resistant high-damping silver alloy and its technique, including following procedure of processing: (1)
Rotary blooming processing, diameter contracting are taken out and are carried out in the cogging of first time after being heated to 500-600 degree in ingot material vacuum drying oven
Then it is cooling to carry out room temperature after vacuum 500-600 degree is tempered 1 hour by 5-8%.(2) multi-pass is swaged, and carries out room temperature to bar
Under processing of swaging, diameter contracting 5-8% per pass will carry out vacuum recrystallization annealing 1 hour of 500-600 degree after every two passage
And furnace cooling, it so repeats to reach 1-2mm until final diameter of rod.(3) wire drawing of multi-pass carries out bar material more
The room temperature wire drawing of passage, per pass diameter contracting 5-6% will carry out the recrystallization annealing 1 hour of 500-600 degree after every two passage simultaneously
Furnace cooling so repeats to reach required billon bond wire diameter until final silk material diameter.(4) at last heat
Reason will be provided with silver-colored bonding line 4 hours of timeliness and furnace cooling under 400-420 degree of final size.
The alloy has extremely excellent casting character, and the temperature being completely melt maintains 870 degree, and fusion temperature range can
To reach 108 degree.Passing through multiple drawing handle, after recrystallization annealing and final timeliness, which can achieve conventional silver key
The mechanical property of zygonema: elasticity modulus 100GPa, yield strength 130MPa, tensile strength 175MPa, elongation percentage are
15%.In addition, the material also has very excellent damping capacity: SDC=22%, and the SDC of conventional silver bonding line is less than 5%.?
While guaranteeing that silver-colored bonding line has enough mechanical strengths, moreover it is possible to efficiently against vibration bring harm.At room temperature
Illustrate that the corrosion rate of the material is according to the corrosion rate of weightlessness characterization after 200 hours in 0.1mol/L sodium sulfide solution
0.05mg/cm2, reached and the equivalent index of common gold thread corrosive nature.Due to the silver bonding line have it is excellent corrosion-resistant
Performance is occurred using no after 5 years due to bonding line Problem of Failure caused by corroding in being encapsulated into semi-enclosed electronic device.
Claims (3)
1. a kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique；According to weight percent, the alloy at
It is divided into: Mn:20.0-25.0wt.%, Pd:1.0-1.5wt.%, Ni:2.0-3.0wt.%, Fe:1.0-2.0wt.%, Ru:0.2-
0.3wt.%, Ge:1.2-1.5wt.%, Mo:0.4-0.6wt.%, Se:0.1-0.2wt.%, surplus are silver.
2. a kind of electric leads bonding is existed with corrosion-resistant high-damping silver alloy and its technique, feature according to claim 1
In including following smelting step: the melting in electric induction furnace by the raw material as above matched, wherein active or Volatile Elements with
The form of intermediate alloy is added;It is protected in fusion process using graphite crucible and argon gas；Crucible is heated to shape after 1000-1100 degree
It is sufficiently stirred 15 minutes or so at alloy melt, and using electromagnetic agitation effect;Alloy melt is stood 15 in 1000 degree of heat preservations
It is cast to after minute and carries out being cast as rodlike (diameter 50-60mm) in waterglass or graphite jig.
3. a kind of electric leads bonding is existed with corrosion-resistant high-damping silver alloy and its technique, feature according to claim 1
In including following procedure of processing: (1) cogging of first time is taken out simultaneously after being heated to 500-600 degree in ingot material vacuum drying oven
Rotary blooming processing is carried out, then it is cooling to carry out room temperature after vacuum 500-600 degree is tempered 1 hour by diameter contracting 5-8%；(2) multiple tracks
Secondary swages, and carries out the processing of swaging under room temperature to bar, per pass diameter contracting 5-8%, to carry out 500-600 after every two passage
The vacuum recrystallization annealing simultaneously furnace cooling in 1 hour of degree, so repeats to reach 1-2mm until final diameter of rod；(3) multiple tracks
Secondary wire drawing carries out the room temperature wire drawing of multi-pass to bar material, per pass diameter contracting 5-6%, to carry out 500- after every two passage
600 degree of recrystallization annealing simultaneously furnace cooling in 1 hour, so repeats to reach required silver alloy key until final silk material diameter
Zygonema diameter；(4) last heat treatment, will be provided with the silver-colored bonding line of final size under 400-420 degree 4 hours of timeliness and with
Furnace is cooling.
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| CN201910225083.7A CN109777991A (en) | 2019-03-25 | 2019-03-25 | A kind of electric leads bonding corrosion-resistant high-damping silver alloy and its technique |
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| CN105925831A (en) * | 2016-05-06 | 2016-09-07 | 河南理工大学 | Production method of high-strength silver alloy bonding wire for encapsulating low-radian LEDs |
| CN106119590A (en) * | 2015-05-07 | 2016-11-16 | Mk电子株式会社 | Silver alloy closing line and manufacture method thereof |
| CN107604196A (en) * | 2017-11-23 | 2018-01-19 | 广州宇智科技有限公司 | A kind of high-strength Ag Li Sc silver lithium alloys close to fine silver electrical conductivity |
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2019
- 2019-03-25 CN CN201910225083.7A patent/CN109777991A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030098A (en) * | 1987-06-06 | 1989-01-04 | 底古萨有限公司 | Silver-iron material as electrical contact |
| CN1073292A (en) * | 1991-12-12 | 1993-06-16 | 中国有色金属工业总公司昆明贵金属研究所 | Silver based alloy electric contact material |
| CN103131885A (en) * | 2011-11-21 | 2013-06-05 | 赫劳斯材料工艺有限及两合公司 | Silver bond wire for semiconductor devices |
| CN106119590A (en) * | 2015-05-07 | 2016-11-16 | Mk电子株式会社 | Silver alloy closing line and manufacture method thereof |
| CN105925831A (en) * | 2016-05-06 | 2016-09-07 | 河南理工大学 | Production method of high-strength silver alloy bonding wire for encapsulating low-radian LEDs |
| CN107604196A (en) * | 2017-11-23 | 2018-01-19 | 广州宇智科技有限公司 | A kind of high-strength Ag Li Sc silver lithium alloys close to fine silver electrical conductivity |
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