WO2010142272A2 - Écran de sérigraphie - Google Patents

Écran de sérigraphie Download PDF

Info

Publication number
WO2010142272A2
WO2010142272A2 PCT/DE2010/000638 DE2010000638W WO2010142272A2 WO 2010142272 A2 WO2010142272 A2 WO 2010142272A2 DE 2010000638 W DE2010000638 W DE 2010000638W WO 2010142272 A2 WO2010142272 A2 WO 2010142272A2
Authority
WO
WIPO (PCT)
Prior art keywords
screen printing
printing form
recesses
recess
elements
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.)
Ceased
Application number
PCT/DE2010/000638
Other languages
German (de)
English (en)
Other versions
WO2010142272A3 (fr
Inventor
Mike Becker
Dietmar LÜTKE-NOTARP
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.)
NB TECHNOLOGIES GmbH
Original Assignee
NB TECHNOLOGIES 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 NB TECHNOLOGIES GmbH filed Critical NB TECHNOLOGIES GmbH
Publication of WO2010142272A2 publication Critical patent/WO2010142272A2/fr
Publication of WO2010142272A3 publication Critical patent/WO2010142272A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/24—Stencils; Stencil materials; Carriers therefor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1216—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by screen printing or stencil printing
    • H05K3/1225—Screens or stencils; Holders therefor
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/20—Electrodes
    • H10F77/206—Electrodes for devices having potential barriers
    • H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing

Definitions

  • the invention relates to a screen printing form and a solar cell produced with the screen printing form.
  • a solar cell having an n-doped layer, a p-doped layer and a pn junction layer
  • light incident on the n-doped layer causes an electric voltage to be generated between the n-doped layer and the p-doped layer, which generates an electrical current at a connected consumer.
  • a metal plate is mounted on the side of the p-doped layer and metallic lines on the side of the n-doped layer. These metallic lines are usually on the one hand to fine metallic lines or so-called fingers, which are arranged for example parallel to each other.
  • the manifold is at least a relatively wide manifold, which is connected to the fingers, wherein by means of the manifold an electrical contact to a consumer can be made.
  • the doped layers may also be present in a different order or number to form a solar cell. Regardless of the structure of the solar cell, an electrical contact is always required to connect a consumer can.
  • the fingers and manifolds are required for the function of the solar cell. However, they have the disadvantage that they shade the arranged under the lines n-doped layer. Thus, only part of the surface of the solar cell is available for the conversion of light energy into electrical energy. The efficiency of a solar cell per unit area could be increased if it is possible to create fingers and busbars that shade a smaller area of the solar cell.
  • the manifolds should not be made arbitrarily small, so that a good contact with metal leads is possible.
  • there is a desire to provide a solar cell which still allows a good electrical contact with low use of expensive electrically conductive materials, such as silver.
  • the fingers and manifolds can be made by screen printing, which is pushed through a screen printing die with narrow recesses for the fingers and wide recesses for the manifolds of electrically conductive material as a printing medium.
  • Such a screen printing form can be formed by the use of etching technology.
  • the disadvantage here is the large width difference between narrow recesses for the fingers and wide recesses for manifolds. Due to flow and field distributions, the etching rate is greater for a wide recess than for a narrow recess, so that different etching depths are achieved.
  • a broad recess is to be formed in a screen printing mold for a collecting line to be subsequently produced, it is not possible to form narrow recesses for later produced fingers with the same etching depth as in the wide recess in the same time or in the same etching step.
  • the etching process is non-uniform with a wide recess in the width, because at the edge of the wide recess is etched deeper into the material due to a stronger flow of the etching liquid in the middle than in the middle.
  • the screen printing form should be inexpensive and have a long life. Furthermore, it is an object of the invention that a solar cell with such a screen printing form can be produced.
  • a screen printing form which has a first layer with first recesses and a second layer with second recesses, wherein the recesses are arranged so that a pressure medium through one of the first recesses and from there through a the second recesses can be conveyed to a substrate which can be placed under the second layer, web elements being provided in the first recesses and support elements being provided in the second recesses, the web elements being connected to the support elements, and at least one web element and a support element having a height together, which is equal to the Siebdruckform Little, wherein a support member supports at least one web element arranged above it, wherein a vertical cross-section of one of the web elements is not equal to a vertical cross-section of one of the support elements.
  • Such a screen printing form thus has recesses with web elements and support elements, which reduce the passage area for a printing medium.
  • This allows the production of a manifold, which has less pressure medium than a manifold, which is made with a screen printing form, the recesses having no web elements and support elements. Since a web member and a support member, which may be integral, together have the same height as the screen printing mold, no print medium can reach the position of the support member, whereby a negative pressure is prevented.
  • This point is on the substrate, which may be the surface of a solar cell, thus not provided with the printing medium, so that at this point radiating light reaches the substrate or the solar cell and no shading occurs. Thus, a higher efficiency of a solar cell can be achieved.
  • the support elements form at a wide recess for a wide manifold a mechanical support, which reduces bending of the screen printing form by a drawn at the top of the stencil doctor.
  • the support elements thus the bending stiffness of the screen printing mold is increased overall.
  • a lower elasticity of the screen printing form can thus be achieved so that when the squeegee moves along on the upper side of the screen printing form, it is stretched less. This has the consequence that the screen printing form according to the invention achieves a longer service life than previous stencils.
  • the support points also form flow obstructions, so that compared to narrow recesses for the production of fingers no significantly stronger flow for the etching liquid can arise.
  • etching speeds in the narrow recesses for the fingers to be produced later in comparison to the wide recesses in which web elements and support elements are present thus hardly differ, so that in the screen printing form an etching depth and etching width can be achieved with relatively small variations. This also causes a homogeneous etching and fingers and manifolds with low cross-sectional variation are possible.
  • a vertical cross section of one of the web elements is unequal to a vertical cross section of one of the support elements.
  • This can be attached to the substrate arbitrary structures.
  • the function of the support and recess on the substrate is thus independent of the opening size or web geometry in the first layer of the screen printing form.
  • the first layer and the second layer of the screen printing form can thus have very different geometries relative to each other.
  • the first or second recess has a width of at least 30 micrometers.
  • the web elements or support elements have at least a width of 10 micrometers, preferably less than 20 micrometers.
  • the support elements each have a round, hexagonal or rectangular cross-section. This can be easily produced by means of etching technology.
  • the support elements may be arranged at regular or irregular intervals from each other, the arrangement at regular intervals allows a homogeneous bending stiffness on the entire surface.
  • the surfaces of the recess and the web elements or support elements are provided with a coating.
  • the coating reduces the passage area for the print medium and allows even narrower line widths, so that lines with even less pressure medium can be produced.
  • the coating has a thickness that is at least 5% of the smallest cross-sectional width of the first or second recess.
  • the coating has a contact angle with water in a range of 0 ° to 90 °.
  • a contact angle is the angle formed by a drop of liquid on the surface of a solid to this surface.
  • the liquid or pasty pressure medium thus forms a relatively good interaction with the surface of the coating, so that a large part of the
  • the coating has a contact angle to water in a range of greater than 90 ° to 150 °, it forms only a small interaction of the pressure medium to the surface of the coating.
  • the pressure medium can be conveyed into the recess with less resistance.
  • the printing medium remaining in the recess can be removed with little effort.
  • the recesses introduced printing medium remains only a small proportion in the recesses when the screen printing form is removed from the substrate. The result is a job with a height that can be equal to the height of the screen printing form.
  • At least one support element extends from one side of the second recess to the opposite side of the second recess and divides the second recess into at least two segments.
  • This can be a Establish a manifold, which has two line segments and is interrupted, so that no continuous power transport is possible. In this way, expensive metallic printing medium can be saved. Nevertheless, the function of the collecting line is ensured if subsequently an additional metal strip bridges the two line segments, wherein the metal strip is connected in parallel with the interrupted bus line.
  • the invention further relates to a solar cell which is produced with a screen printing form as described above.
  • Fig. 1 shows a first cross section of a first embodiment of the invention
  • FIG. 2 is a second cross section of the first embodiment of the invention
  • Fig. 3 is a plan view of the first embodiment of the screen printing form according to the invention.
  • Fig. 4 is a plan view of a second embodiment of the invention.
  • FIG. 5 shows a first plan view of a substrate produced by means of the screen printing form according to the invention
  • 6 shows a second plan view of a substrate produced by means of the screen printing form according to the invention
  • Fig. 7 shows a cross section of a third embodiment of the invention
  • FIG. 8 shows a horizontal section of the third embodiment of the screen printing form according to the invention.
  • Fig. 9 is a plan view of the third embodiment of the invention.
  • FIG. 10 is a plan view of a substrate made by the screen printing form of the present invention
  • Fig. 11 is a cross-section of a fourth embodiment of the invention
  • FIG. 12 is a side view of a substrate, which by means of the fourth
  • Embodiment of the screen form is provided with a pressure medium.
  • FIGS. Fig. 3 shows a plan view of the screen printing form 100, wherein in Fig. 1 is a cross section along the dash-dotted line designated A-B and in Fig. 2 is a cross section along the designated C-D dot-dash line.
  • the screen printing form 100 has a first layer 1, which is referred to below as a network layer 1.
  • a printing medium can be conveyed into a first recess 2 with a doctor, not shown.
  • web elements 3 are arranged, which are distributed with a regular, net-like structure in the first recess 2, see Fig. 3.
  • a second layer 4, hereinafter referred to as stencil layer 4 present at This Tinsforrn is integrally formed with the network layer 1.
  • the stencil sheet 4 has a second recess 5, in which support elements 6 are provided.
  • the web elements 3 are connected to the support elements 6 and formed in one piece.
  • the height of a web element 3 and an associated support element 6 is equal to the height 7 of the screen printing form 100. If a doctor along the top of the net layer 1 moves sideways and a pressure medium transported in the recesses 2 and 3, reduce the support elements 6 a deflection of the screen printing form 100 perpendicular to the doctor blade movement, since the support elements 6 are supported on the arranged under the stencil sheet 4 to be printed substrate.
  • FIG. 2 shows a cross section of the screen printing form 100 along the dot-dash line indicated by CD in FIG. 3.
  • the web elements 3 in the first recess 2 can be seen, however, no support element 6 is shown in this cross section.
  • the second recess 5 thus has no support element 6 at this location, so that a pressure medium can reach the second recess 5 through the first recess 2 and forms a pressure line on the substrate arranged below the screen printing form 100, which width corresponds to the width of the second recess 5 equivalent.
  • the web elements 3 can thus be suppressed, the web elements 3 increase the stability of the network layer 1.
  • support elements 6 are provided in the second recess 5, which are supported on the substrate, can reach no pressure medium at these support points, so that at these locations a negative pressure is prevented and the printing medium on the substrate is not present. This additionally causes a saving of pressure medium, which is usually a relatively expensive metallic and conductive material such as silver in a solar cell.
  • the width 8 of the first recess 2 is at least 30 micrometers, wherein the width of a web element 3 is at least 10 micrometers.
  • Fig. 1 and Fig. 3 are
  • Screen printing form 100 in FIG. 4 which also has a support element with an elliptical cross section.
  • a regular arrangement of the support elements 6 is advantageous in view of a low deflection of the screen printing form.
  • FIG. 5 shows a printed image on a substrate 9.
  • the applied printing medium 10 has at the locations where the circular support elements 6 are arranged in the screen printing mold 100, recesses 11. There is no printing medium 10 is present, so that in a metallic and electrically conductive printing medium 10, an electric current in the area around the Recesses 11 is passed around.
  • the recesses can also be hexagonal or rectangular, see reference numerals 12, 13 and 14 in FIG. 6. Recesses with a hexagonal cross-section are advantageous for optimum area utilization.
  • the rectangular recess 14 causes an electric current in the printing medium 10 to be interrupted.
  • FIG. 9 shows a plan view of a third embodiment of the screen printing form 100, wherein FIG. 7 shows the cross section along the dot-dash line indicated by EF in FIG.
  • a rectangular support element 6 is arranged under a first recess 2, the support element 6 extending from one side of the second recess 5 to the opposite other side of the second recess.
  • the second recess 5 is completely traversed at this point by a support member 6, so that a pressed through the first recess 2 through the pressure medium can not reach the substrate at this point.
  • the second recess 5 is thus divided into a first segment 15 and a second segment 16, see FIG. 8. Only in these two segments 15 and 16 can the printing medium reach the substrate.
  • FIG. 10 shows a plan view of a substrate produced by means of the screen printing form 100 according to the invention.
  • the substrate in this case a solar cell 23, is printed by means of a printing medium 10 with a printed first metallic line 17 having a width 18 and a second metallic line 19 having a width 20.
  • the first metallic line 17 is a relatively narrow line that can act as a finger on a solar cell.
  • the second metallic conduit 19 is a relatively wide conduit which electrically contacts the first metallic conduits 17 and acts as a manifold.
  • the second metallic line 19 has circular recesses 11 and rectangular recesses 13. Further, a recess 21 is provided, which interrupts the second metallic line 19. This is also achieved with the recesses 22.
  • FIG. 11 shows a cross section of a fourth embodiment of the screen printing form 100 according to the invention.
  • the surfaces of the first recess 2 and the second recess 5 and the web elements 3 and support elements 6 are provided with a coating 24.
  • FIG. 12 shows a side view of the substrate 9, which is provided with the printing medium 10 by means of the fourth embodiment of the screen printing form. However, the metallic line 25 from the printing medium 10 is shown extending slightly in width in this illustration.
  • the coating has a thickness that is at least 5% of the smallest cross-sectional width of the passage opening 26 of the first recess 2 or second
  • Recess 5 is. In the limiting case, it can also close the passage opening 26, so that no pressure medium can pass through it.
  • the coating is a non-stick coating, can be very narrow
  • the screen printing form 100 with the first layer 1 as a mesh layer and the second layer 4 as a stencil layer may be integrally formed.
  • the two layers 1 and 4 are then defined only by the depth of the recesses 2 and 5.
  • the first layer 1 and second layer 4 are formed of two parts, which consist of the same or different materials.
  • the screen printing form may consist of a stainless steel foil, from which the mesh layer 2 and stencil layer 4 are worked out by means of chemical etching.
  • the mesh layer has a film which has the first recesses 2 and is combined with a stencil layer 4 and firmly joined, which has been worked out of photosensitive emulsion based on polyvinyl alcohol, a capillary film or a solid resist, or by means of structured electroplating , preferably by means of nickel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

Écran de sérigraphie comprenant une première couche pourvue de premiers évidements et une seconde couche pourvue de seconds évidements, les évidements étant agencés de sorte qu'un fluide d'impression peut s'écouler à travers un des premiers évidements puis à travers un des seconds évidements de manière à atteindre un substrat pouvant être placé sous la seconde couche. Des éléments de cloisonnement et des éléments de soutien sont placés respectivement dans les premiers évidements et dans les seconds évidements, les éléments de cloisonnement étant reliés aux éléments de soutien et au moins un élément de cloisonnement avec un élément de soutien possédant une hauteur égale à celle de l'écran de sérigraphie, un élément de soutien soutenant au moins un élément de cloisonnement placé au-dessus et un des éléments de cloisonnement présentant une section transversale verticale différente de celle d'un des éléments de soutien.
PCT/DE2010/000638 2009-06-09 2010-06-09 Écran de sérigraphie Ceased WO2010142272A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009024877A DE102009024877A1 (de) 2009-06-09 2009-06-09 Siebdruckform
DE102009024877.3 2009-06-09

Publications (2)

Publication Number Publication Date
WO2010142272A2 true WO2010142272A2 (fr) 2010-12-16
WO2010142272A3 WO2010142272A3 (fr) 2011-03-10

Family

ID=43028918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000638 Ceased WO2010142272A2 (fr) 2009-06-09 2010-06-09 Écran de sérigraphie

Country Status (3)

Country Link
CN (1) CN201824658U (fr)
DE (2) DE102009024877A1 (fr)
WO (1) WO2010142272A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003287A1 (de) * 2011-01-27 2012-08-02 Christian Koenen Gmbh Druckschablone zum Aufbringen eines Druckmusters auf ein Substrat und Verfahren zum Herstellen einer Druckschablone
JP2018065396A (ja) * 2018-01-23 2018-04-26 マクセルホールディングス株式会社 スクリーン印刷用メタルマスク
JP2020059290A (ja) * 2019-01-11 2020-04-16 マクセルホールディングス株式会社 メタルマスク
CN111137002A (zh) * 2019-12-31 2020-05-12 帝尔激光科技(无锡)有限公司 一种新型网版及其制作方法
WO2023180285A1 (fr) * 2022-03-25 2023-09-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. Pochoir et dispositifs d'impression permettant de réaliser des pistes conductrices sur un substrat et procédé de fabrication d'une structure de contact métallique d'une cellule solaire photovoltaïque

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TW201308616A (zh) * 2011-08-03 2013-02-16 Motech Ind Inc 於基板上形成導電性圖案之方法
CN103192589B (zh) * 2012-01-09 2016-12-14 昆山允升吉光电科技有限公司 双面蚀刻制作金属型太阳能网板的方法
CN103203969B (zh) * 2012-01-16 2017-04-05 昆山允升吉光电科技有限公司 一种三维立体掩模板及其制备工艺
CN103358671B (zh) * 2012-04-10 2017-06-06 昆山允升吉光电科技有限公司 蜂窝状金属丝网
GB2521344A (en) 2013-10-27 2015-06-24 Asm Assembly Systems Switzerland Gmbh Printing screens, methods of fabricating the same and methods of screen printing
JP6894141B2 (ja) * 2019-06-07 2021-06-23 株式会社プロセス・ラボ・ミクロン メタルマスク、及びその製造方法
KR102595815B1 (ko) * 2021-02-03 2023-10-31 한빅솔라(주) 태양전지의 전극 인쇄용 스텐실 마스크
DE102022209195A1 (de) * 2022-09-05 2024-03-07 Robert Bosch Gesellschaft mit beschränkter Haftung Vorrichtung und Verfahren zum Bedrucken eines Substrats mit einem Dicht- und/oder Klebstoff
CN120245586A (zh) * 2023-12-29 2025-07-04 昇印光电（昆山）股份有限公司 一种印刷网版

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003287A1 (de) * 2011-01-27 2012-08-02 Christian Koenen Gmbh Druckschablone zum Aufbringen eines Druckmusters auf ein Substrat und Verfahren zum Herstellen einer Druckschablone
CN103347695A (zh) * 2011-01-27 2013-10-09 克里斯提安-可安恩-高科技模具有限公司 用于施加显影图案于基板的显影模板及产生显影模板的方法
JP2018065396A (ja) * 2018-01-23 2018-04-26 マクセルホールディングス株式会社 スクリーン印刷用メタルマスク
JP2020059290A (ja) * 2019-01-11 2020-04-16 マクセルホールディングス株式会社 メタルマスク
CN111137002A (zh) * 2019-12-31 2020-05-12 帝尔激光科技(无锡)有限公司 一种新型网版及其制作方法
JP2021104686A (ja) * 2020-01-22 2021-07-26 マクセルホールディングス株式会社 メタルマスク
WO2023180285A1 (fr) * 2022-03-25 2023-09-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. Pochoir et dispositifs d'impression permettant de réaliser des pistes conductrices sur un substrat et procédé de fabrication d'une structure de contact métallique d'une cellule solaire photovoltaïque

Also Published As

Publication number Publication date
WO2010142272A3 (fr) 2011-03-10
DE102009024877A1 (de) 2010-12-23
DE202010007773U1 (de) 2010-10-28
CN201824658U (zh) 2011-05-11

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