EP1511629B1 - Vorrichtung und verfahren zum positionieren eines zu bedruckenden substrats - Google Patents

Vorrichtung und verfahren zum positionieren eines zu bedruckenden substrats Download PDF

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Publication number
EP1511629B1
EP1511629B1 EP03752760A EP03752760A EP1511629B1 EP 1511629 B1 EP1511629 B1 EP 1511629B1 EP 03752760 A EP03752760 A EP 03752760A EP 03752760 A EP03752760 A EP 03752760A EP 1511629 B1 EP1511629 B1 EP 1511629B1
Authority
EP
European Patent Office
Prior art keywords
substrate
screen
printing
print table
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03752760A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1511629A2 (de
Inventor
Karl Schanz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asys Automatisierungssysteme GmbH
Original Assignee
Asys Automatisierungssysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asys Automatisierungssysteme GmbH filed Critical Asys Automatisierungssysteme GmbH
Publication of EP1511629A2 publication Critical patent/EP1511629A2/de
Application granted granted Critical
Publication of EP1511629B1 publication Critical patent/EP1511629B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/10—Screen printing machines characterised by their constructional features
    • B41P2215/11—Registering devices

Definitions

  • the invention relates to an apparatus and a method for positioning a lying on a printing table according to the screen printing process substrate to be printed against the printing pattern of the screen of the screen printing device.
  • the screen printing process is one of the classic printing methods by which very accurate and fine print pattern can be achieved. Such patterns are necessary, for example, for the conductor arrangement in solar cells. Therefore, they are applied in practice by the screen printing method.
  • a very accurate positioning is required, which should not exceed a positional deviation of ⁇ 15 ⁇ m.
  • high productivity should be achievable, ie low cycle times with largely automatic operation.
  • the conveyed substrate to be printed on the printing table of the screen printing device is placed and fixed by means of a vacuum device by suction.
  • the screen carrying the stencil sheet or printing pattern is then placed over the printing table and lowered onto the substrate for screen printing. Due to various circumstances, in particular by the inaccuracy of the conveying and depositing device when fixing the substrate, however, there is the necessary accuracy exceeding deviations of the relative position between the screen and substrate to be printed. It is therefore necessary to detect the corresponding deviation and to change the relative position of substrate and sieve, depending on the detected deviation. Suitably, this is generally achieved by twisting and / or moving the screen relative to the already fixed on the printing table substrate. It can also be moved to the printing table and rotated. Finally, a mixed form can also be used.
  • Essential is thus a very accurate determination of the actual position of the substrate on the printing table. After the shape of the substrate as it leaves its manufacturing process, is known very well, it is sufficient to detect certain predetermined edge portions of the substrate in their position relative to the printing table exactly, with a 5 such edge portion by an edge, so an abrupt transition from the substrate is marked to the printing table.
  • a screen printing machine of the known type is in DE 40 37 678 A1 disclosed.
  • a web to be printed is guided to the screen printing device which includes at least one slidably mounted screen and a device for reading registration marks or the like for a multicolor print.
  • the slidably mounted sieve is connected to servomotors, which are controlled by at least one surveillance camera reading the register marks or color shifts, the pulse generator of which controls the servomotors via a computer or the like.
  • a disadvantage of this device is that the adjustment of the screen is carried out according to the relative position of two or more superimposed color print layers, whereby a correction of the screen position is possible only after successful printing. This is due to the fact that the material to be printed consists of a continuous web, whereby no positioning of the screen with respect to a fixed point on the material to be printed can be done itself.
  • the disadvantage here is that for reading the reference marks of the substrate, the screen must be removed in each case from the viewable by the viewing unit area. This means a reduction in the speed of the production process.
  • the substrate and the surrounding area of the printing table are well illuminated and the actual position of the substrate or the actual position of the predetermined edge portions of the substrate by means of a photoelectric detector, in particular a CCD camera detected.
  • the electrical signal characterizing the actual position of the edge section is processed, and by means of the signals generated during the processing, the relative adjustment of the screen relative to the substrate fixed on the printing table can be achieved.
  • the position of the substrate deposited and fixed on the printing table outside the actual printing area is achieved by successively approaching the predetermined edge sections by means of a movable CCD camera. After detecting the different edge sections, the position is calculated by coordinate calculation. Together with the calculation and the subsequent adjustment of the screen, the printing table is moved to the printing position. This procedure is very time consuming and requires numerous moving parts. In addition, significant masses have to be moved. Furthermore, a very complex calibration, in particular by making trial prints is required. If two movable printing tables are used on which intermittent printing is used, different printing results may occur.
  • the CCD camera is also used for detecting the position of the screen in the known positioning system in a development, so that the positioning of the screen relative to the substrate is somewhat simplified, in particular the initialization or calibration is simplified.
  • the cycle times are even higher and the device is more complex overall and contains even more movable parts.
  • the object of the present invention is thus to provide a device and a method for positioning a substrate applied to a printing table, in which a minimum displacement of the screen is necessary for position control of the relative position of the substrate on the printing table to the screen, whereby the process simplified and accelerated.
  • the basic idea of the present invention is to arrange both the illumination arrangement and the photoelectric detector in or under the printing table and to use the very closely approximated screen as a diffuse reflector, whereby the printing table can remain stationary and the screen depends on the values determined during the detection the actual situation can only be adjusted to a limited extent.
  • Fig. 1 shows a screen printing device 1, consisting essentially of a printing table 2 and a screen. 3
  • a substrate to be printed 4 is stored in a pressure position as possible corresponding position on the table surface 5 of the printing table 2 and fixed by means not shown ansich known Vakuumansaug Rheinen in position.
  • the actual or actual position of the deposited substrate 4 is accurately detected at certain predetermined edge portions 6. In general, three such edge portions are sufficient, but in individual cases, more or fewer edge portions may be required or even sufficient, depending on the type of substrate and the accuracy of the applied printing.
  • a lighting arrangement 7 which illuminates the opposite side of the screen 3 from the side of the printing table 2, specifically in the area of the predetermined edge section 6 considered, wherein the light is diffused on the screen 3.
  • a very good illumination of the substrate 4 is achieved in the predetermined edge portion 6, with high contrast.
  • each of the predetermined edge portions 6 associated photoelectric arrangement in particular a CCD camera 8
  • this strong contrast is detected, so the actual position of the predetermined edge portion 6 relative to the printing table 2 detected extremely accurate.
  • the photoelectric device may also be formed by a suitable laser device or a line scan camera. This accurate detection allows the derivation of adjustment signals for adjusting the screen 3 relative to the substrate 4 on the printing table 2 in accordance with adjusting movements of the screen represented by arrows 9, 10 and 11 3, by moving in the horizontal plane and turning in this horizontal plane.
  • the adjustment arrangements required for this purpose are not shown in detail, since they are commercially available.
  • the evaluation circuit of the detection signals of the CCD cameras 8 is not shown, since this is also commercially available.
  • the CCD camera 8 looks at the predetermined edge portion 6 through the printing table 2 through a viewing window 12, which is completed in the table surface 5 by a transparent insert, such as an acrylic or glass insert 13, the screen 3 facing side with the Table surface 5 is flush.
  • a transparent insert such as an acrylic or glass insert 13
  • the illumination arrangement 7 is also associated with the respective predetermined edge section 6 and integrated in the embodiment in the printing table 2 in this area.
  • at least one light-emitting element such as an LED 14 is installed in the printing table 2 and illuminates the facing side of the screen 3 by also a transparent insert, for example, an acrylic or glass insert 15 therethrough, wherein the screen 3 side facing also flush with the Table surface 5 of the printing table 2 is.
  • a transparent insert for example, an acrylic or glass insert 15 therethrough
  • two such LED 14 are provided with corresponding glass inserts 15.
  • the electrical supply lines are not shown. There may be more than two such LED 14 are provided, which are arranged substantially concentric with the viewing window 12.
  • a reflector or mirror 17 is used in such a position that the light emitted by the LED 14 is directed or focused substantially on a region of the screen 3, which is approximately in the middle of the detection part the CCD camera 8, as corresponds approximately to the axis of symmetry of the viewing window 12.
  • the accuracy of the detection of the respective edge portion 6 is increased.
  • a disturbance or impairment of the detection at another predetermined Randabschitt is also avoided if this is spatially very close.
  • the mirror 17 the light can also be replaced by another suitable device, such. B. a light guide, and the screen 3 are formed.
  • Fig. 1 shows in addition to the described arrangement of illumination assembly 7 and CCD camera 8, a further corresponding arrangement of a second illumination assembly 18 and a second CCD camera 19, these two arrangements have substantially the same structure and the same assignment to each other.
  • This second arrangement of illumination arrangement 18 and CCD camera 19 is used to detect a further, not shown here predetermined edge portion.
  • This further edge section may relate to the same substrate 4.
  • the second illumination arrangement 18 and the second CCD camera 19 can be in a position which corresponds to a predetermined edge section of a substrate of a different format.
  • the LED of this second lighting arrangement 18 may be already integrated in the printing table 2 incorporated, wherein it is only put into operation when a correspondingly assigned or predetermined edge portion is to be detected.
  • the CCD camera 19 may also be removed in the given case. After all, a CCD camera can also do several Assigned to viewing windows and, depending on the format of the substrate to be printed between which, if necessary, be moved automatically.
  • An advantage of the device according to the invention is further that after detecting the predetermined edge portion 6 neither the printing table 2 nor the substrate 4 are moved, whereby the highest possible accuracy in the detection and printing are ensured. Since, after the adjustment of the screen 3 as a result of the detection of the position of the at least one predetermined edge portion 6 of the substrate to be printed 4 only on a very short path (as indicated by arrow 20) must be lowered to the substrate 4 to carry out the screen printing, is also achieves the highest possible accuracy, since any impairment that might arise in the case of long paths of movement is avoided.
  • the distance of the wire 3 from the table surface 5 is determined only by the thickness of the substrate 4 and the conditions that are required to supply the substrate 4 from outside the printing table 2 and place it on the table surface 5. This makes it possible to bring the position of the substrate 4 and the screen 3 as early as possible in preliminary or coarse coverage in an automatic operating method, and the eventual adjustment only for the alignment of the screen 3 relative to the substrate 4 as a result of the signals of the CCD Camera 8 bring about. Also, the calibration of the system can be performed without further resources.
  • the invention is very tolerant of thickness variations, before in particular, when the distance between the sieve 3 and the table surface 5 when carrying out the photoelectric detection is about 5 mm.
  • the printing of solar cells by means of the present invention can be carried out with cycle times of only 3 seconds or less per printing process.
  • the invention is not limited to the printing of solar cells.
  • the invention is also suitable for printing on thick film hybrids, of LCD arrangements, in particular flat screens, of LTCCs and the like.
EP03752760A 2002-05-17 2003-05-16 Vorrichtung und verfahren zum positionieren eines zu bedruckenden substrats Expired - Lifetime EP1511629B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10222119A DE10222119B4 (de) 2002-05-17 2002-05-17 Vorrichtung und Verfahren zum Einstellen der relativen Lage zwischen einem zu bedruckenden Substrat und einem Druckmuster
DE10222119 2002-05-17
PCT/EP2003/005200 WO2003097357A2 (de) 2002-05-17 2003-05-16 Vorrichtung und verfahren zum positionieren eines zu bedruckenden substrats

Publications (2)

Publication Number Publication Date
EP1511629A2 EP1511629A2 (de) 2005-03-09
EP1511629B1 true EP1511629B1 (de) 2010-12-15

Family

ID=29413935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03752760A Expired - Lifetime EP1511629B1 (de) 2002-05-17 2003-05-16 Vorrichtung und verfahren zum positionieren eines zu bedruckenden substrats

Country Status (10)

Country Link
US (1) US7225734B2 (ja)
EP (1) EP1511629B1 (ja)
JP (1) JP4262675B2 (ja)
CN (1) CN1323834C (ja)
AT (1) ATE491572T1 (ja)
DE (2) DE10222119B4 (ja)
DK (1) DK1511629T3 (ja)
ES (1) ES2357891T3 (ja)
PT (1) PT1511629E (ja)
WO (1) WO2003097357A2 (ja)

Cited By (1)

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CN102615950A (zh) * 2012-03-29 2012-08-01 东莞市嘉腾仪器仪表有限公司 丝网印刷机及其对位方法

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US7639861B2 (en) * 2005-09-14 2009-12-29 Cognex Technology And Investment Corporation Method and apparatus for backlighting a wafer during alignment
WO2007113877A1 (en) * 2006-03-31 2007-10-11 Afco C.V. Apparatus and method to metalize supports for photovoltaic cells
US8162584B2 (en) 2006-08-23 2012-04-24 Cognex Corporation Method and apparatus for semiconductor wafer alignment
DE102006051558A1 (de) * 2006-11-02 2008-05-08 Manz Automation Ag Siebdruckanlage
DE102007041057A1 (de) * 2007-08-29 2009-03-05 Manz Automation Ag Verfahren zum Herstellen einer Solarzelle
GB2452320B (en) 2007-09-03 2012-04-11 Dek Int Gmbh Workpiece processing system and method
GB2458463B (en) * 2008-03-17 2013-02-20 Dek Int Gmbh Imaging system and method
US8139231B2 (en) 2008-05-01 2012-03-20 Cognex Corporation Machine vision technique for manufacturing semiconductor wafers
US8215473B2 (en) * 2008-05-21 2012-07-10 Applied Materials, Inc. Next generation screen printing system
TW201002528A (en) * 2008-07-02 2010-01-16 Atma Champ Entpr Corp Contactless screen printing method and equipment thereof
TW201006675A (en) * 2008-08-07 2010-02-16 Atma Champ Entpr Corp Automatic alignment device
US8189194B2 (en) * 2008-09-12 2012-05-29 Cognex Corporation Direct illumination machine vision technique for processing semiconductor wafers
US8570516B2 (en) * 2008-09-12 2013-10-29 Cognex Corporation Infrared direct illumination machine vision technique for semiconductor processing equipment
CN101676102B (zh) * 2008-09-16 2011-06-15 东远机械工业(昆山)有限公司 自动对位装置
DE102008051052A1 (de) * 2008-10-09 2010-04-15 Ekra Automatisierungssysteme Gmbh Drucktischanordnung
EP2380738B1 (de) 2010-04-22 2014-05-28 Manz AG Drucksieb und Verfahren zur Einstellung der relativen Lage eines Druckmusters und eines Substrats
JP5565384B2 (ja) 2011-06-29 2014-08-06 パナソニック株式会社 スクリーン印刷装置およびスクリーン印刷装置における画像認識方法
CN102431332B (zh) * 2011-09-30 2013-07-31 南京华显高科有限公司 玻璃基板与网版快速对位印刷的方法
CN102673106B (zh) * 2012-05-09 2014-05-07 华中科技大学 一种用于光伏太阳能硅片的丝网印刷定位设备及定位方法
DE102014215022B3 (de) * 2014-07-30 2015-09-03 Ekra Automatisierungssysteme Gmbh Drucksystem und Verfahren zum Bedrucken von Substraten
CN104842636A (zh) * 2015-05-29 2015-08-19 中电投西安太阳能电力有限公司 太阳能电池片金属印刷台面
ITUB20161142A1 (it) 2016-02-29 2017-08-29 Vismunda Srl Metodo e impianto produttivo automatico per la stampa su celle fotovoltaiche.
CN110641140A (zh) * 2019-10-08 2020-01-03 无锡嘉瑞光伏有限公司 一种太阳能电池片快速印刷传输装置
CN112092495B (zh) * 2020-10-12 2021-11-19 海宁市米奥服饰有限公司 一种用于平网印花的网框调节装置

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Also Published As

Publication number Publication date
ES2357891T3 (es) 2011-05-03
ATE491572T1 (de) 2011-01-15
CN1323834C (zh) 2007-07-04
WO2003097357A3 (de) 2004-06-10
DE10222119B4 (de) 2004-11-11
JP2005525953A (ja) 2005-09-02
US7225734B2 (en) 2007-06-05
CN1642739A (zh) 2005-07-20
US20050166772A1 (en) 2005-08-04
JP4262675B2 (ja) 2009-05-13
PT1511629E (pt) 2011-01-04
DE50313326D1 (de) 2011-01-27
EP1511629A2 (de) 2005-03-09
WO2003097357A2 (de) 2003-11-27
DE10222119A1 (de) 2003-12-04
DK1511629T3 (da) 2011-03-14

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