CN101442174B - Method for welding electric external down-lead on electrode of ITO conductive glass - Google Patents
Method for welding electric external down-lead on electrode of ITO conductive glass Download PDFInfo
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- CN101442174B CN101442174B CN2008101630101A CN200810163010A CN101442174B CN 101442174 B CN101442174 B CN 101442174B CN 2008101630101 A CN2008101630101 A CN 2008101630101A CN 200810163010 A CN200810163010 A CN 200810163010A CN 101442174 B CN101442174 B CN 101442174B
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- welding
- silver
- electrode
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- conductive glass
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Abstract
The invention relates to a method for welding an electric outer lead on an electrode of ITO conductive glass, which comprises the steps of preparation of amorphous low melting glass powder, preparation of a silver paste for welding, coating and reduction of the silver paste, welding of the outer lead and so on. The method welds the electrode of the conductive glass and an external circuit; the welding resistance is small, and ohmic contact is performed; a welded joint has sizeable tensile strength and shear strength; and the welding method can highly and reliably weld the electrode of the ITO conductive glass with small width and small space, is simple, and is easy and quick to operate.
Description
Technical field
The invention relates to the method for the electric outer lead of welding, more particularly, is the method about the electric outer lead of welding on the electrode of ITO electro-conductive glass.
Background technology
The ITO electro-conductive glass is applied in the electronic technology, its application mainly contains two big classes: a class is to utilize the little performance of ITO electro-conductive glass transparency conducting layer resistance, be used for various photoelectric devices, as flat-panel display device [Plasma Display (PDP), Field Emission Display (FED) and LCDs (LCD) etc.], solar cell, power conversion windows etc. are as transparent conductance layer (electrode), another kind of is to utilize ITO electro-conductive glass transparency conducting layer to have than big resistance and as heating element, the elimination of heating when forming frost on the aircraft high-altitude flight porthole, also have desk tops glass plate heating in winter for roasting hand heating of clerical workforce or the like, they have made useful contribution for improving aspects such as photoelectric device performance and safe flight.
Above-mentioned ITO electro-conductive glass is all realized by applying external voltage when using, obviously, the transmission of operating voltage must apply on it by lead, because the particularity of glass substrate material, the method that present external wire is electrically connected with electro-conductive glass adopts three kinds of means substantially: the one, by conductive rubber, be positioned between conductive glass electrode and the printed circuit board (PCB), exert pressure, the three is closely contacted, realize good electrical connection, be connected with external circuit as LCD and promptly adopt the method; The 2nd, will draw lead with conducting resinl (is main component with epoxy resin and silver powder) and be bonded on the electrode of electro-conductive glass; The 3rd, by the elastic metallic folder, clamp the electrode on the electro-conductive glass, the other end of metal clip is drawn lead, links with external circuit, as the connected mode of desk tops glass plate heating.These three kinds of methods of attachment all have shortcoming, the former can not bear high voltage, conductive rubber is with breakdown when the little and applied voltage of adjacent electrode distance is high slightly, in addition, connect also inconvenient, need add certain pressure and make with the electrode of electro-conductive glass and closely contact on conductive rubber, pressure must be evenly, and this conductive rubber for long size is connected very difficult with electro-conductive glass; The outer lead that second method can't be implemented when electro-conductive glass top electrode width or spacing are not more than 0.5mm is electrically connected, and also very big (electro-conductive glass is a soda-lime glass, and its thermal coefficient of expansion is 70～80 * 10 because the thermal coefficient of expansion of epoxy resin and glass differs
-7/ ℃, the thermal coefficient of expansion of epoxy resin is about 6 * 10
-5/ ℃), the situation that glass was peeled off even broken to conducting resinl and glass will take place at low temperature environment; Method three reliability of electrical connection are poor, easily strike sparks, and also have the deficiency that this connected mode can't be implemented at all when electrode width on the electro-conductive glass or spacing little (being not more than 0.5mm).
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of new electrically connected method is provided, utilizing this method to carry out conductive glass electrode is connected with the weldering of external circuit, contact resistance is an ohmic contact, can realize that the outer lead when electro-conductive glass top electrode width or spacing are not more than 0.5mm is electrically connected, particularly connect reliably, good stretching and shear strength are arranged.
The invention provides the method for the electric outer lead of welding on the electrode of ITO electro-conductive glass, comprise: preparation fuses the operation of non-crystalline type glass powder with low melting point, preparation welding silver slurry slurry, the coating of silver slurry and reduction and welding outer lead, the steps include:
(1) preparation non-crystalline type glass powder with low melting point; With lead oxide red (Pb
3O
4), silicon dioxide (SiO
2), boric acid (H
3BO
3), aluminium oxide (Al
2O
3), zinc oxide (ZnO) mixes, prescription is by weight: 65～80% lead oxide, 2～8% silicon dioxide, 10～20% boric acid, 1～5% aluminium oxide, 5～10% zinc oxide; Then, raw material with above-mentioned prescription, drop into the ball mill ball milling 12～24 hours, and fully mixed, take out splendid attire in high-temperature crucible, put into temperature and be 1100～1200 ℃ burner hearth, be incubated 15～25 minutes, be poured in the water, treat its cooling, be baked to driedly, ball milling becomes particle diameter 250～350 purpose powders stand-by.
(2) the preparation welding is starched slurry with silver; Non-crystalline type glass powder with low melting point with silver oxide (AgO), bismuth oxide (BiO), lead borate (PbBO3), rosin and above-mentioned preparation mixes earlier, prescription is by weight: 70～80% silver oxides, 2～6% bismuth oxides, 2～5% lead borates, 10～20% rosin, 5～10% glass dust; With the raw material of above-mentioned prescription, the ball mill ball milling 6～10 hours of packing into obtains solid mixt; Then, press solid mixt 100 grams and add 20～30 milliliters of terebinthine proportionings, solid mixt is mixed with turpentine oil, ball milling took out lucifuge, low temperature preservation more than 48 hours.
(3) the silver slurry applies and reduction; Adopt method for printing screen that silver slurry seal is coated on the conductive glass electrode of intending the welding outer lead, also available small size writing brush is manual to be coated in slurry on the conductive glass electrode of welding, then, electro-conductive glass is put into Muffle furnace, be warming up to 360～400 ℃ with 6～10 ℃ of/minute heating rates, temperature retention time 5～10 minutes is taken out after cooling, this moment, the silver slurry was reduced into silver, and is topped on the electrode of electro-conductive glass.
(4) welding outer lead; Use small-power (being not more than 25W) electric iron and solder stick outer lead to be welded on the as-reduced silver layer with conventional wire bonding method.
The present invention welds the method for electric outer lead on the electrode of ITO electro-conductive glass operation principle is: 1. welding is starched slurry based on silver oxide with silver, be coated with silver slurry slurry or writing brush is manual is coated on the conductive glass electrode of intending the welding outer lead with silk screen printing seal, through heating, silver oxide is reduced into silver, and chemical equation is as follows:
AgO→Ag+O
2↑
Silver is good conductor, and be very easy to soak into Sn and Pb in the solder stick, and it is topped on the electrode of electro-conductive glass, can obtain very little contact resistance when using electric iron with scolding tin welding outer lead.2. in silver slurry slurry, add glass powder with low melting point, the thermal coefficient of expansion of this glass dust and conducting glass substrate coupling, therefore the heating back strikes up partnership with glass substrate, increase the solder bond reliability between external wire and the conductive glass electrode greatly, improved the stretching and the shear strength of welding lead.
The invention has the beneficial effects as follows: welding resistance is little, is ohmic contact; Pad has sizable tensile strength and shear strength; Can carry out highly reliable welding to little width and little spacing ITO conductive glass electrode; Welding method is simple, and operation is row, quick easily.
Description of drawings
Fig. 1 is the cross sectional representation that the present invention welds electric outer lead.
Among the figure: 1. glass plate, 2. the ITO electrode on the glass plate, the 3. silver slurry layer after the reduction, 4. outer lead, 5. bump.
Embodiment
The invention will be further described below in conjunction with embodiment.
The electric outer lead of welding on the back glass plate ITO electrode of plasma display panel (PDP).
The first step, preparation non-crystalline type glass powder with low melting point: with lead oxide red (Pb
3O
4), silicon dioxide (SiO
2), boric acid (H
3BO
3), aluminium oxide (Al
2O
3), zinc oxide (ZnO), by weight, with 72%: 5%: 15%: mixing in 2%: 6%, dropped into the ball mill ball milling 20 hours, take out splendid attire in high-temperature crucible (as the diamond spar crucible), put it into temperature and be 1160 ℃ burner hearth heating, be incubated 20 minutes, treat its fusion taking-up, glass metal is poured in the water, the oven dry of cooling back, ball milling becomes particle diameter 250～350 purpose powders stand-by.
Second step, preparation welding silver slurry slurry: with silver oxide (Ag
2O), bismuth oxide (Bi
2O), lead borate (PbBO
3), the non-crystalline type glass powder with low melting point of rosin, preparation, by weight, with 76%: 4%: 3%: mixing in 11%: 6%, the ball mill ball milling 8 hours of packing into; Then, this solid mixt is mixed with turpentine oil, mixing ratio is that 100 gram solid mixts add in 25 milliliters of turpentine oil, and ball milling took out lucifuge, low temperature preservation more than 48 hours.
The 3rd step, apply and reduction silver slurry: silver slurry seal is coated on the PDP conductive glass electrode of intending the welding outer lead with method for printing screen, then, electro-conductive glass is put into Muffle furnace, be warming up to 390 ℃ with 6～10 ℃ of/minute heating rates, temperature retention time 6 minutes is taken out after cooling, this moment silver slurry has been reduced into silver, covers behind the PDP on the glass plate ITO electrode.
At last, carry out electric outer lead welding: use small-power (being not more than 25W) electric iron electric outer lead to be welded on the silver layer of reduction of PDP conductive glass electrode with conventional wire bonding method.
The electric outer lead of welding on warming oneself with the ITO electrode of desk tops glass plate.
First step preparation non-crystalline type glass powder with low melting point is with lead oxide red (Pb
3O
4), silicon dioxide (SiO
2), boric acid (H
3BO
3), aluminium oxide (Al
2O
3), zinc oxide (ZnO), by weight, with 75%: 3%: 12%: 2%: 8% mixed, then, the ball mill ball milling 20 hours of packing into, take out splendid attire in high-temperature crucible, push temperature and be fusion in 1180 ℃ the heating furnace, be incubated 15 minutes, pour in the water and cool off, taking-up is dried, and ball milling becomes particle diameter 250～350 purpose powders stand-by.
The second step preparation welding is with silver slurry slurry, with silver oxide, bismuth oxide, lead borate, rosin, non-crystalline type glass powder with low melting point, by weight, with 78%: 5%: 3%: 9%: 5% mixed, the ball mill ball milling 8 hours of packing into; Then, this solid mixt is mixed with turpentine oil, mixing ratio is that 100 gram solid mixts add in 28 milliliters of turpentine oil, packs the ball mill ball milling into more than 48 hours, takes out lucifuge, low temperature preservation.
The 3rd step applied and reduction silver slurry, with small size writing brush is manual slurry is coated on the ITO electrode of heating with the desk tops glass plate, then, electro-conductive glass is put into Muffle furnace, be warming up to 380 ℃ with 6～10 ℃ of/minute heating rates, temperature retention time 8 minutes is taken out after cooling, this moment, black silver slurry was reduced into white silver layer, was covered on the ITO electrode of heating with the desk tops glass plate.
Final step, the welding outer lead uses the small power electric flatiron that is not more than 25W with conventional wire bonding method electric outer lead to be welded on the as-reduced silver layer of ITO electrode of heating with the desk tops glass plate.
Claims (1)
1. the method for the electric outer lead of welding on the electrode of indium tin oxide-coated glass comprises: the glass powder with low melting point of preparation non-crystalline type, preparation welding apply with silver slurry slurry, silver slurry and the process of reduction and welding outer lead, it is characterized in that:
(1) glass powder with low melting point of preparation non-crystalline type mixes lead oxide red, silicon dioxide, boric acid, aluminium oxide, zinc oxide, and prescription is by weight: 65～80% lead oxide, 2～8% silicon dioxide, 10～20% boric acid, 1～5% aluminium oxide, 5～10% zinc oxide; Raw material with above-mentioned prescription, dropped into the ball mill ball milling 12～24 hours, fully mix, take out splendid attire in high-temperature crucible, put into temperature and be 1100～1200 ℃ burner hearth, be incubated 15～25 minutes, taking-up is poured in the water, treat its cooling, oven dry, ball milling becomes particle diameter 250～350 purpose powders stand-by;
(2) preparation welding is with silver slurry slurry, and the glass powder with low melting point of the non-crystalline type of silver oxide, bismuth oxide, lead borate, rosin and above-mentioned preparation is mixed, and prescription is by weight: 70～80% silver oxides, 2～6% bismuth oxides, 2～5% lead borates, 10～20% rosin, 5～10% glass dust; With the raw material of above-mentioned prescription, the ball mill ball milling 6～10 hours of packing into obtains solid mixt; Then, press solid mixt 100 grams and add 20～30 milliliters of terebinthine proportionings, solid mixt is mixed with turpentine oil, ball milling is more than 48 hours, and taking-up silver slurry slurry lucifuge, low temperature are preserved;
(3) the silver slurry applies and reduction: adopt method for printing screen that the silver slurry slurry seal of above-mentioned preparation is coated on the conductive glass electrode of intending the welding outer lead, or be coated on the conductive glass electrode of welding with the manual silver slurry slurry of small size writing brush with above-mentioned preparation, then, electro-conductive glass is put into Muffle furnace, be warming up to 360～400 ℃ with 6～10 ℃ of/minute heating rates, temperature retention time 5～10 minutes is taken out after cooling, and it is topped on the electrode of electro-conductive glass that this moment, the silver slurry was reduced into silver;
(4) welding outer lead: use to be not more than low power electric iron of 25W and solder stick, the wire bonding method with conventional is welded on outer lead on the as-reduced silver layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101630101A CN101442174B (en) | 2008-12-02 | 2008-12-02 | Method for welding electric external down-lead on electrode of ITO conductive glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101630101A CN101442174B (en) | 2008-12-02 | 2008-12-02 | Method for welding electric external down-lead on electrode of ITO conductive glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101442174A CN101442174A (en) | 2009-05-27 |
| CN101442174B true CN101442174B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101630101A Expired - Fee Related CN101442174B (en) | 2008-12-02 | 2008-12-02 | Method for welding electric external down-lead on electrode of ITO conductive glass |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131315B (en) * | 2010-09-28 | 2013-03-06 | 施吉承 | Formula of electrode solution for electro-thermal film heating tube |
| JP2012212615A (en) * | 2011-03-31 | 2012-11-01 | Sony Corp | Method for manufacturing photoelectric conversion element, photoelectric conversion element, and electronic apparatus |
| CN108511111A (en) * | 2018-03-14 | 2018-09-07 | 福建宏佳光电科技有限公司 | A kind of transparent conductive substrate and conductor connecting structure and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067129A (en) * | 1992-07-04 | 1992-12-16 | 电子科技大学 | Closed electroluminescent screen and manufacture method thereof |
| CN1115121A (en) * | 1995-05-19 | 1996-01-17 | 李毅 | Internal-connection amorphous silicon solar cell and manufacture method |
| US6334570B1 (en) * | 1999-07-29 | 2002-01-01 | Matsushita Electric Industrial Co., Ltd. | Soldering method |
| CN1383355A (en) * | 2002-05-10 | 2002-12-04 | 上准衡器股份有限公司 | Technology for making strengthened glass circuit board and its product and application |
-
2008
- 2008-12-02 CN CN2008101630101A patent/CN101442174B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067129A (en) * | 1992-07-04 | 1992-12-16 | 电子科技大学 | Closed electroluminescent screen and manufacture method thereof |
| CN1115121A (en) * | 1995-05-19 | 1996-01-17 | 李毅 | Internal-connection amorphous silicon solar cell and manufacture method |
| US6334570B1 (en) * | 1999-07-29 | 2002-01-01 | Matsushita Electric Industrial Co., Ltd. | Soldering method |
| CN1383355A (en) * | 2002-05-10 | 2002-12-04 | 上准衡器股份有限公司 | Technology for making strengthened glass circuit board and its product and application |
Non-Patent Citations (1)
| Title |
|---|
| US 6334570 B1,全文. |
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| CN101442174A (en) | 2009-05-27 |
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Granted publication date: 20101006 Termination date: 20101202 |