CN103763795B - Producing method of thick film heating element and method for determining using amount of resistor paste - Google Patents
Producing method of thick film heating element and method for determining using amount of resistor paste Download PDFInfo
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- CN103763795B CN103763795B CN201410023921.XA CN201410023921A CN103763795B CN 103763795 B CN103763795 B CN 103763795B CN 201410023921 A CN201410023921 A CN 201410023921A CN 103763795 B CN103763795 B CN 103763795B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims abstract description 33
- 238000007639 printing Methods 0.000 claims abstract description 27
- 238000005245 sintering Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 57
- 238000005070 sampling Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000007650 screen-printing Methods 0.000 claims description 8
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000010923 batch production Methods 0.000 abstract description 6
- 238000012795 verification Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
Abstract
The invention discloses a producing method of a thick film heating element and a method for determining the using amount of resistor paste. According to the technical parameter requirement of the element, the whole circuit area s of a resistive film corresponding to a cold-state resistance value is calculated; the standard sintering thickness h1 of the resistive film and the sintering shrinking ratio f of the paste are known, and the printing thickness value h2 of the paste is calculated; according to the whole circuit area s of the resistive film, the volume V of the resistance paste which should be printed on the element is calculated; according to the resistance paste density d, the mass M1 of the resistance paste which should be printed on the element is calculated; before batch production, pressure on a scraper of a screen printer is regulated, several groups of different Mn values are selected in an up-and-down fluctuation mode with the M1 value as the center, production verification is performed, and the accurate mass value M2 is determined. Once the printing mass M2 of the resistance paste is determined, the mass of the resistance paste on the element can be detected at regular time and regular intervals in the printing period when batch production is performed, the paste which is printed soon is recycled immediately when deviation is found, inferior-quality products are prevented from being formed in the sintering process in a furnace, and irreparable loss is avoided.
Description
Technical field
The present invention relates to thick-film heating element production technology, be specifically related to thick-film heating element resistance slurry consumption defining method and production method.
Background technology
At present, along with the more and more maturation of thick-film heating technology, the scope that this technology is employed is also more and more wider.Usually, the heating circuit of thick-film heating element and heating resistor film adopt the mode of silk screen printing that resistance slurry is printed on substrate surface mostly.And through high temperature sintering process.As everyone knows, the determination of thick film element important parameter resistance value (resistance value of the utility model indication is cold conditions), is mainly limited by the sheet resistance of resistance material, the length and width of circuit and thickness, and the factor such as sintering temperature in production process.The wherein length and width of sheet resistance, circuit, by design and selection, substantially can be controlled, so under the condition that sintering temperature is identical, maximum parameter is exactly thick film line thicknesses.That is, when other condition is constant, the film thickness of circuit has just become the key parameter determining thick film element resistance value.
How is the thickness of resistive film determined? in theory, we can by the drying of resistance slurry, sintering shrinkage than the thickness calculating slurry printing, and how according to this theoretic throat, resistance slurry to be printed onto on workpiece, just become the technical bottleneck of producing thick film element.Certainly, can realize above-mentioned requirements by numerical control printing machine or 3D printing technique, but numerical control printing machine or 3D printing technique are universal not enough at present, use cost is higher, and speed of production is slow, and efficiency is low.
Current, enterprise in process of production, adopts following way to solve this technical problem usually:
1, control print thickness, when silk screen printing, by regulating scraper and the pressure between half tone and workpiece, test piece under examination printing several groups of variable pressure force value, marks different pressures and corresponding workpiece respectively, then enters the sizing of sintering furnace sintering, again resistance value mensuration is carried out to the workpiece after sintering, and these numerical value are associated with corresponding scraper pressure is corresponding.In test data, find out required resistance value, determine corresponding scraper pressure further.Then print according to this pressure.
2, if do not have resistance value in need, just choose immediate numerical value, then according to based on pressure corresponding to this numerical value, proceed pressure adjusting, repeat the program of previous step, until find out suitable resistance value and scraper pressure value, then produce by this scraper pressure position.
Although above-mentioned way can to a certain degree solve this technical problem, depend merely on pressure to control thickness, unstable, in process of production, many factors can affect pressure, finally has influence on the thickness of printing.Also just can not get required resistance value.Moreover, when production out after find resistance value have deviation, cannot change, large quantities of substandard products can bring economic loss to enterprise.Finally, when pinpointing the problems, when needing again to repeat to start to print, find the process of target resistance values, because often test sintering one time, at least need 70 minutes, in this process, empty stove running, mistake, power consumption, production cost can be increased to enterprise, reduce the economic benefit of enterprise.
For above-mentioned reasons, enterprise cannot produce in batches in fact.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of thick-film heating element silk screen printing resistance slurry method for determination of amount and production method.
Technical scheme of the present invention is: thick-film heating element resistance slurry consumption defining method, comprises the following steps: 1, calculates resistive film circuit gross area s corresponding to cold-state resistance value according to product requirement; 2, provide by the shrinkage ratio f(material supplier of used resistance slurry) and this slurry standard sintered thickness h
1, calculate the print thickness value h of slurry
2; 3, calculate by the resistive circuit gross area s volume V that heating element should print up resistance slurry; 4, provide by the density value d(material supplier of used resistance slurry or survey) calculate the stock quality M that heating element should print
1, i.e. M
1=h
1× f × s × d; 5, centered by this value, by adjustment printing machine scraper pressure, choose several groups of different values, find out the mass value M with Element Technology parameter adaptation by test
2.
Further improvement of the present invention comprises:
Also comprise with this mass M
1centered by value, by regulating the pressure of screen process press scraper, fluctuating and choosing several groups of different Mn values, carrying out production checking, thus determine mass value M accurately
2.
Also comprise, determining printing slurry mass M
2enter the normal production phase with after screen printing apparatus doctor position, at regular intervals or often print some and namely tackle and be printed on the quality of resistance slurry on element and inspect by random samples, if any deviation, adjust immediately, avoid substandard products to produce.Sampling observation time or quantity interval are depending on production stability, and the initial stage should strengthen sampling observation frequency, to be produced stable after can reduce sampling observation frequency gradually, to guarantee that product is stablized.
Another object of the present invention is to the production method additionally providing a kind of thick-film heating element, 1, according to product requirement calculate cold-state resistance value corresponding resistive film circuit gross area s; 2, by use the basic sintering thickness h of resistance slurry
1with shrinkage ratio f, calculate the print thickness value h of slurry
2; 3, the volume V that be printed on resistance slurry on element is calculated by resistive circuit gross area s; 4, calculate the mass M that be printed on element spreading mass by the density value d of used resistance slurry
1, i.e. M
1=h
2× s × d; Centered by this mass value, by regulating the pressure of screen process press scraper, fluctuating and choosing indefinite incremental data group and carry out productions and verify, until determine mass value M accurately
2till; In printing process, interval sampling observation comparison quality is determined in timing, if any deviation, is immediately reclaimed by the slurry on workpiece, readjusts scraper pressure, ensure to press M
2mass value print production.
Technological merit of the present invention is: 1, once printed resistor stock quality is determined, when producing in batches, can regularly determine interval and carry out Detection job, once find deviation, can remove immediately and reclaim firm typographic slurry, avoid forming a large amount of substandard products after stove sintering, cause irremediable loss.2, enhance productivity, because when finding that printing quality value has deviation to carry out debugging and finds desired value M
2time, only need carry out at printing stage, sinter 70 minutes without the need to entering stove, so efficiency is greatly improved, reducing power consumption simultaneously, improve Business Economic Benefit.4, the inventive method is simple and easy to use, is beneficial to and popularizes, and can effectively reduce enterprise's production cost.The thick-film heating element technical parameter utilizing the present invention to produce is accurately stable, and practicality simple to operate, is beneficial to batch production.
Embodiment
Thick-film heating element resistance slurry consumption defining method of the present invention, comprises the following steps: 1, calculates resistive film circuit gross area s corresponding to cold-state resistance value according to product requirement; 2, provide by the shrinkage ratio f(material supplier of used resistance slurry) and this slurry standard sintered thickness h
1, calculate the print thickness value h of slurry
2; 3, calculate by the resistive circuit gross area s volume V that heating element should print up resistance slurry; 4, calculate by the density value d of used resistance slurry the stock quality M that heating element should print
1, i.e. M
1=h
1× f × s × d; 5, centered by this value, choose several groups of different values, find out the mass value M with Element Technology parameter adaptation by test
2.Those skilled in the art can find out M by repeatedly debugging printing machine scraper position when producing
2value, and produce with this value.
With above-mentioned result of calculation for theoretical value M
1, during production, also need with this mass M
1centered by value, fluctuate and choose data and verify, until determine mass value M accurately
2till.Like the prior art, the sample getting many group different values sinters verification method, then tests, M of the present invention
2once determine, only need the resistance slurry quality that workpiece prints be tested later.Meanwhile, when producing in batches, only in printing process, timing need determine interval sampling observation comparison quality, if any deviation, immediately the slurry on workpiece being reclaimed, readjust scraper pressure, to obtain correct M
2.
Thick-film heating element resistance slurry consumption defining method of the present invention, comprise the following steps: get some (10 ~ 30) workpiece to be processed, by the quality comparation to printing front and back, record it and print the stock quality got on, test after sintering, to determine the stock quality value required for technical requirement.
The present invention also comprises, the normal production phase is entered after determining screen printing equipment doctor position, (or printing some) reply resistance slurry quality be printed on product are inspected by random samples at regular intervals, if there is deviation, printing machine scraper pressure must be adjusted in time, to guarantee by standard quality value M
2print production.
Another object of the present invention is to the production method that a kind of thick-film heating element is provided, 1, according to product technology require calculate cold-state resistance value corresponding resistive film circuit gross area s; 2, by use the standard sintered thickness h of resistance slurry
1with shrinkage ratio f, calculate the print thickness value h of slurry
2; 3, the volume V that be printed on resistance slurry on element is calculated by resistive circuit gross area s; 4, calculate the mass M that be printed on element spreading mass by the density value d of used resistance slurry
1, i.e. M
1=h
2× s × d; With this mass value M
1centered by, by regulating the pressure of screen process press scraper, fluctuating and choosing indefinite incremental data group and carry out productions and verify, until determine mass value M accurately
2till; In printing process, interval sampling observation comparison quality is determined in timing, if any deviation, is immediately reclaimed by the slurry on workpiece, readjusts scraper pressure, to obtain correct M
2.
The present invention also comprises, the normal production phase is entered after determining screen printing equipment doctor position, (or printing some) reply resistance slurry quality be printed on product are inspected by random samples at regular intervals, if generation error, printing machine scraper pressure must be adjusted in time, to guarantee by standard quality value M
2print production.Technological merit of the present invention is: 1, once printed resistor stock quality is determined, when producing in batches, can regularly determine interval and carry out Detection job, once find deviation, can remove immediately and reclaim firm typographic slurry, avoid forming a large amount of substandard products after stove sintering, cause irremediable loss.2, enhance productivity, because when finding that printing quality value has deviation to carry out debugging and finds desired value M
2time, only need carry out at printing stage, sinter 70 minutes without the need to entering stove, so efficiency is greatly improved, reducing power consumption simultaneously, improve Business Economic Benefit.4, the inventive method is simple and easy to use, is beneficial to and popularizes, and can effectively reduce enterprise's production cost.The thick-film heating element technical parameter utilizing the present invention to produce is accurately stable, and practicality simple to operate, is beneficial to batch production.During batch production, various factors can cause product resistance value to occur error.In order to solve this problem, the present invention, in often production some, must carry out sampling observation comparison, to guarantee the qualification rate of product.Also the frequency of sampling observation can be determined according to the condition of production of reality.Only need by the resistance slurry mass value M that is just printed on element and standard quality value M during sampling observation
2compare, do not need to test again after stove sintering.
Technological merit of the present invention is: 1, once printed resistor stock quality is determined, when producing in batches, can regularly determine interval and carry out Detection job, once find deviation, can remove immediately and reclaim firm typographic slurry, avoid forming a large amount of substandard products after stove sintering, cause irremediable loss.2, enhance productivity, because when finding that printing quality value has deviation to carry out debugging and finds desired value M
2time, only need carry out at printing stage, sinter 70 minutes without the need to entering stove, so efficiency is greatly improved, reducing power consumption simultaneously, improve Business Economic Benefit.4, the inventive method is simple and easy to use, is beneficial to and popularizes, and can effectively reduce enterprise's production cost.The thick-film heating element technical parameter utilizing the present invention to produce is accurately stable, and practicality simple to operate, is beneficial to batch production.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (5)
1. thick-film heating element resistance slurry consumption defining method, is characterized in that, comprise the following steps: 1, calculates resistive film circuit gross area s corresponding to cold-state resistance value according to product requirement; 2, use the sintering shrinkage of resistance slurry than f and this slurry standard sintered thickness h by institute
1, calculate the print thickness value h of resistance slurry
2; 3, calculate by the resistive circuit gross area s volume V that heating element should print up resistance slurry; 4, calculate by the density value d of used resistance slurry the resistance slurry mass M that heating element should print up
1, i.e. M
1=h
1× f × s × d; 5, centered by this value, fluctuate and choose several groups of different values, find out the mass value M with Element Technology parameter adaptation by test
2.
2. thick-film heating element resistance slurry consumption defining method according to claim 1, is characterized in that, also comprise with this mass M
1centered by value, by regulating the pressure of screen process press scraper, fluctuating and choosing several groups of different Mn values, carrying out production and verify, thus determine the M of mass value accurately that adapts with heating element technical requirement
2.
3. thick-film heating element resistance slurry consumption defining method according to claim 1, is characterized in that, described thick-film heating element carries out by silk screen printing and high temperature sintering the thick-film heating element produced.
4. thick-film heating element resistance slurry consumption defining method according to claim 1, it is characterized in that, also comprise, the normal production phase is entered after determining printing slurry quality and screen printing apparatus doctor position, at regular intervals or often print some namely to tackle and be printed on the quality of resistance slurry on element and inspect by random samples, if any deviation, adjust immediately, avoid substandard products to produce.
5. use a thick-film heating element production method for thick-film heating element resistance slurry consumption defining method described in claim 1, it is characterized in that, 1, according to product requirement calculate cold-state resistance value corresponding resistive film circuit gross area s; 2, by use the standard sintered thickness h of resistance slurry
1with shrinkage ratio f, calculate the print thickness value h of slurry
2; 3, the volume V that be printed on resistance slurry on element is calculated by resistive circuit gross area s; 4, calculate the mass M that be printed on element spreading mass by the density value d of used resistance slurry
1, i.e. M
1=h
2× s × d; With this mass M
1centered by value, by regulating the pressure of screen process press scraper, fluctuating and choosing indefinite incremental data group and carry out productions and verify, until determine mass value M accurately
2till; With this mass M in printing process
2for standard timing determines interval sampling observation comparison quality, if any deviation, immediately the slurry on workpiece is reclaimed, readjust scraper pressure, to obtain correct M
2value is produced.
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| CN201410023921.XA CN103763795B (en) | 2014-01-20 | 2014-01-20 | Producing method of thick film heating element and method for determining using amount of resistor paste |
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| CN201410023921.XA CN103763795B (en) | 2014-01-20 | 2014-01-20 | Producing method of thick film heating element and method for determining using amount of resistor paste |
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| CN103763795B true CN103763795B (en) | 2015-06-10 |
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| CN109835077B (en) * | 2017-11-27 | 2020-02-21 | 中国科学院福建物质结构研究所 | High-precision silk-screen printing process |
| CN111432506B (en) * | 2020-04-02 | 2022-04-19 | 浙江安扬新能源科技有限公司 | Manufacturing process of heating chip |
| CN113923805A (en) * | 2020-07-09 | 2022-01-11 | 碳元科技股份有限公司 | Graphite flake for far infrared heating and preparation method thereof |
| CN113628821B (en) * | 2021-08-08 | 2023-02-10 | 西安瑞特三维科技有限公司 | Preparation and resistance value adjustment method of 3D printing resistor |
| CN114242362B (en) * | 2021-12-22 | 2023-12-05 | 锦州七七七微电子有限责任公司 | Method for preparing thick film substrate resistor layer by utilizing automatic printing table according to initial value of resistor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0663648A2 (en) * | 1994-01-14 | 1995-07-19 | International Business Machines Corporation | Force transducer |
| CN1440219A (en) * | 2003-01-22 | 2003-09-03 | 尹惠来 | Electrothermal film manufacture |
| CN101106866A (en) * | 2007-08-07 | 2008-01-16 | 徐立军 | Production technology for high-precision fully resistance carbon film overlapping board |
| CN101150893A (en) * | 2007-11-13 | 2008-03-26 | 成都华西坝汽车电子有限责任公司 | A making method for electric heating film |
| CN101699920A (en) * | 2009-11-20 | 2010-04-28 | 宁波今山电子材料有限公司 | Method for preparing polyimide heating film |
| CN102598160A (en) * | 2009-11-05 | 2012-07-18 | 住友金属矿山株式会社 | Transparent conductive film and manufacturing method for same, element using same, transparent conductive substrate and device using same |
| CN102632703A (en) * | 2009-06-29 | 2012-08-15 | 财团法人金属工业研究发展中心 | Pressure feedback type scraper module |
-
2014
- 2014-01-20 CN CN201410023921.XA patent/CN103763795B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0663648A2 (en) * | 1994-01-14 | 1995-07-19 | International Business Machines Corporation | Force transducer |
| CN1440219A (en) * | 2003-01-22 | 2003-09-03 | 尹惠来 | Electrothermal film manufacture |
| CN101106866A (en) * | 2007-08-07 | 2008-01-16 | 徐立军 | Production technology for high-precision fully resistance carbon film overlapping board |
| CN101150893A (en) * | 2007-11-13 | 2008-03-26 | 成都华西坝汽车电子有限责任公司 | A making method for electric heating film |
| CN102632703A (en) * | 2009-06-29 | 2012-08-15 | 财团法人金属工业研究发展中心 | Pressure feedback type scraper module |
| CN102598160A (en) * | 2009-11-05 | 2012-07-18 | 住友金属矿山株式会社 | Transparent conductive film and manufacturing method for same, element using same, transparent conductive substrate and device using same |
| CN101699920A (en) * | 2009-11-20 | 2010-04-28 | 宁波今山电子材料有限公司 | Method for preparing polyimide heating film |
Non-Patent Citations (1)
| Title |
|---|
| 郑德海.丝网印刷机.《网版印刷技术》.2001,202-232. * |
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Address after: No. 7 Xinru Street, Hongqi District, Xinxiang City, Henan Province, 453000, No. 18 Xindong Industrial Park, Liandong U Valley, Xinxiang, Henan Province Patentee after: XINXIANG JIEDA PRECISION ELECTRONICS CO.,LTD. Country or region after: China Address before: 453000 torch Park, high tech Zone, Xinxiang City, Henan Province Patentee before: XINXIANG JIEDA PRECISION ELECTRONICS CO.,LTD. Country or region before: China |