DE102011014471A1 - Method for manufacturing electrical circuit device used in junction box of solar cell module, involves providing connection region for electronic component on substrate surface before hardening applied solder paste - Google Patents
Method for manufacturing electrical circuit device used in junction box of solar cell module, involves providing connection region for electronic component on substrate surface before hardening applied solder paste Download PDFInfo
- Publication number
- DE102011014471A1 DE102011014471A1 DE102011014471A DE102011014471A DE102011014471A1 DE 102011014471 A1 DE102011014471 A1 DE 102011014471A1 DE 102011014471 A DE102011014471 A DE 102011014471A DE 102011014471 A DE102011014471 A DE 102011014471A DE 102011014471 A1 DE102011014471 A1 DE 102011014471A1
- Authority
- DE
- Germany
- Prior art keywords
- solder paste
- electrical circuit
- electronic component
- conductor
- solar cell
- 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.)
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Classifications
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- 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
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
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- 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
- H05K3/20—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 by affixing prefabricated conductor pattern
- H05K3/202—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 by affixing prefabricated conductor pattern using self-supporting metal foil pattern
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10174—Diode
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0195—Tool for a process not provided for in H05K3/00, e.g. tool for handling objects using suction, for deforming objects, for applying local pressure
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- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0392—Pretreatment of metal, e.g. before finish plating, etching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer elektrischen Schaltungsanordnung mit einem durch Stanzbleche gebildete Leiterbahnen umfassenden Schaltungssubstrat, wobei elektronische Bauelemente mittels eines Reflow-Lötprozesses mit den Leiterbahnen verbunden werden.The invention relates to a method for producing an electrical circuit arrangement comprising a printed circuit board formed by printed circuit boards circuit substrate, wherein electronic components are connected by means of a reflow soldering process with the conductor tracks.
Derartige elektrische Schaltungsanordnungen werden insbesondere dort eingesetzt, wo durch diese hohe Ströme getragen werden müssen, etwa wenn es sich bei den verwendeten elektronischen Bauteilen um Leistungsbauelemente handelt. Ein Schaltungssubstrat dessen Leiterbahnen durch Stanzbleche aus einem Material mit hoher elektrischer Leitfähigkeit gebildet sind, eignet sich hierzu besonders.Such electrical circuit arrangements are used in particular where high currents have to be carried by them, for example when the electronic components used are power components. A circuit substrate whose interconnects are formed by stamping plates made of a material with high electrical conductivity is particularly suitable for this purpose.
Ein Beispiel hierfür stellen Anschluss- und Verbindungsdosen für Solarmodule dar, bei denen neben der Verbindung der Leiter des Solarmoduls mit den äußeren Anschlussleitungen auch so genannte Bypass-Dioden mit den Leiterbahnen der Anschluss- und Verbindungsdose verbunden werden müssen. Diese Bypass-Dioden sind dabei antiparallel zu den Solarzellen geschaltet und bewirken, dass bei einer abgeschatteten Solarzelle innerhalb eines Solarzellenmoduls diese eine Solarzelle zwar keinen Beitrag mehr zur Gesamtspannung des Solarzellenmoduls leistet, der Stromfluss jedoch trotzdem erhalten bleibt. Das Solarzellenmodul zeigt somit lediglich eine verminderte Betriebspannung, fällt jedoch nicht vollständig aus, wie dies ohne die Bypass-Dioden der Fall wäre. Außerdem wird in der abgeschatteten Solarzelle keine Leistung mehr umgesetzt, so dass eine Beschädigung der abgeschatteten Solarzelle vermieden werden kann.An example of this are connection and junction boxes for solar modules, in which, in addition to the connection of the conductor of the solar module with the outer leads and so-called bypass diodes must be connected to the tracks of the connection and junction box. These bypass diodes are connected in anti-parallel to the solar cells and cause that in a solar cell shaded within a solar cell module this solar cell makes no contribution to the total voltage of the solar cell module, the current flow is still maintained. The solar cell module thus shows only a reduced operating voltage, but does not completely fail, as would be the case without the bypass diodes. In addition, no power is converted in the shaded solar cell, so that damage to the shaded solar cell can be avoided.
Die Bypass-Dioden werden dabei als SMD-Bauelemente auf den Leiterbahnen positioniert und dann in einem Reflow-Lötprozess mit diesen verlötet. Dazu werden die Leiterbahnen an den später die Anschlussbereiche bildenden Lötflächen zunächst mit einer Lötpaste versehen, was z. B. in einem Siebdruckverfahren erfolgen kann. Danach werden die Schaltungskomponenten – in der Regel durch eine automatische Bestückungsmaschine – mit ihren Anschlüssen in die Paste der entsprechenden Lötflächen gedrückt. Das so bestückte Schaltungssubstrat durchläuft danach in einer Reflow-Lötanlage ein Temperaturprofil, in dem zunächst bestimmte Bestandteile der Lötpaste ausgasen, bevor das enthaltene Flussmittel aktiviert wird, und schließlich in der Aufschmelzzone das in der Lötpaste enthaltene Lötzinn aufgeschmolzen und so die Lötverbindung hergestellt wird.The bypass diodes are positioned as SMD components on the interconnects and then soldered in a reflow soldering process with these. For this purpose, the conductor tracks are first provided with a solder paste on the later forming the terminal areas soldering surfaces, which z. B. can be done in a screen printing process. Thereafter, the circuit components - usually by an automatic placement machine - pressed with their connections in the paste of the corresponding pads. The thus assembled circuit substrate then undergoes a temperature profile in a reflow soldering system, in which initially outgas certain components of the solder paste before the flux contained is activated, and finally melted in the melting zone, the solder contained in the solder paste and so the solder joint is produced.
Während bei gewöhnlichen, gedruckten Leiterplatten durch die Geometrie der Lötpads und/oder den Einsatz von Lötstopplack gewährleistet werden kann, dass die elektronischen Bauteile in dem gesamten Prozess vom Bestücken der Leiterplatte bis zum Erstarren der Lötverbindung allein durch die Adhäsionskraft der Lötpaste in ihrer Position gehalten werden, ist dies bei einem durch Stanzbleche gebildete Leiterbahnen umfassenden Schaltungssubstrat nicht möglich. Hier „verschwimmen” die elektronischen Bauteile beim Aufschmelzen der Lötpaste aus ihrer ursprünglichen Bestückungsposition, so dass sie sich beim Erstarren des Lötzinns nicht mehr an ihrer bestimmungsgemäßen Position befinden. Wegen ihrer besonderen Eignung als Schaltungssubstrat für Schaltungsanordnungen der hier betroffenen Art werden als Stanzbleche häufig feuerverzinnte Kupferbleche eingesetzt, bei denen die angesprochene Problematik sogar noch verstärkt auftritt, weil während des Lötvorgangs neben der Lötpaste auch die vollflächig vorhandene Zinnschicht aufschmilzt.While in ordinary printed circuit boards, the geometry of the solder pads and / or the use of solder resist can ensure that the electronic components are held in position throughout the process from board assembly to solder joint solidification only by the adhesion force of the solder paste , this is not possible with a printed circuit board formed by printed circuit traces comprehensive circuit substrate. Here, the electronic components "blur" during the melting of the solder paste from its original placement position, so that they are no longer at their intended position when solidifying the solder. Because of their particular suitability as a circuit substrate for circuit arrangements of the type involved here are often used as stamped sheet hot-dip copper sheets, where the problem mentioned even more occurs because during the soldering process in addition to the solder paste and the entire surface existing tin layer melts.
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren bereitzustellen, bei dem die beschriebenen Nachteile des Standes der Technik wirkungsvoll vermieden werden.The object of the present invention is therefore to provide a method in which the disadvantages of the prior art described are effectively avoided.
Das erfindungsgemäße Verfahren löst diese Aufgabe ohne Zuhilfenahme zusätzlicher mechanischer Bauteile, Klebemedien oder ähnlichem, dadurch, dass zumindest eine Leiterbahn in einem als Anschlussbereich für ein elektronisches Bauelement vorgesehenen Flächenbereich vor dem Aufbringen der Lötpaste aufgeraut wird.The method according to the invention achieves this object without the aid of additional mechanical components, adhesive media or the like, in that at least one printed conductor is roughened in a surface region provided as a connection region for an electronic component prior to the application of the solder paste.
Weitere Ausgestaltungen und zweckmäßige Weiterbildungen des erfindungsgemäßen Verfahrens sind in den Unteransprüchen angegeben und gehen auch aus der nachfolgenden Beschreibung des in der Zeichnung dargestellten Ausführungsbeispiels hervor.Further embodiments and expedient developments of the method according to the invention are specified in the dependent claims and will become apparent from the following description of the embodiment shown in the drawing.
Dabei zeigen:Showing:
Der in
Die Aufrauung der Oberfläche der Leiterbahnen
Nach dem Abkühlen des fertig gelöteten Leiterbahnnutzens werden die einzelnen Schaltungsanordnungen durch Ausstanzen aus dem Leiterbahnnutzen herausgelöst. In
Bei den bereits vorher erwähnten, und in der
Die Erzeugung der Aufrauungen erfolgt für die beiden genannten Arten von Flächenbereichen
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011014471A DE102011014471A1 (en) | 2011-03-18 | 2011-03-18 | Method for manufacturing electrical circuit device used in junction box of solar cell module, involves providing connection region for electronic component on substrate surface before hardening applied solder paste |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011014471A DE102011014471A1 (en) | 2011-03-18 | 2011-03-18 | Method for manufacturing electrical circuit device used in junction box of solar cell module, involves providing connection region for electronic component on substrate surface before hardening applied solder paste |
Publications (1)
Publication Number | Publication Date |
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DE102011014471A1 true DE102011014471A1 (en) | 2012-09-20 |
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Application Number | Title | Priority Date | Filing Date |
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DE102011014471A Withdrawn DE102011014471A1 (en) | 2011-03-18 | 2011-03-18 | Method for manufacturing electrical circuit device used in junction box of solar cell module, involves providing connection region for electronic component on substrate surface before hardening applied solder paste |
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DE (1) | DE102011014471A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112091347A (en) * | 2020-08-31 | 2020-12-18 | 浙江双宇电子科技有限公司 | Novel tin-dispensing and reflow soldering process method for solar photovoltaic junction box |
-
2011
- 2011-03-18 DE DE102011014471A patent/DE102011014471A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112091347A (en) * | 2020-08-31 | 2020-12-18 | 浙江双宇电子科技有限公司 | Novel tin-dispensing and reflow soldering process method for solar photovoltaic junction box |
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R163 | Identified publications notified | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |