DE102013020189B4 - Printing template and method for its production - Google Patents
Printing template and method for its production Download PDFInfo
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- DE102013020189B4 DE102013020189B4 DE102013020189.6A DE102013020189A DE102013020189B4 DE 102013020189 B4 DE102013020189 B4 DE 102013020189B4 DE 102013020189 A DE102013020189 A DE 102013020189A DE 102013020189 B4 DE102013020189 B4 DE 102013020189B4
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- circuit board
- stencil
- printed circuit
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- printing
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- 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
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- 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
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/663—Elements for spacing panes
- E06B3/667—Connectors therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
- F02D19/0652—Biofuels, e.g. plant oils
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0684—High pressure fuel injection systems; Details on pumps, rails or the arrangement of valves in the fuel supply and return systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/085—Control based on the fuel type or composition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/065—Introducing corrections for particular operating conditions for engine starting or warming up for starting at hot start or restart
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/12—Feeding by means of driven pumps fluid-driven, e.g. by compressed combustion-air
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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
- H05K3/12—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
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- 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
- B41C1/145—Forme preparation for stencil-printing or silk-screen printing by perforation using an energetic radiation beam, e.g. a laser
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- 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
- B41N1/242—Backing sheets; Top sheets; Intercalated sheets, e.g. cushion sheets; Release layers or coatings; Means to obtain a contrasting image, e.g. with a carbon sheet or coating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
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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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09736—Varying thickness of a single conductor; Conductors in the same plane having different thicknesses
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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
- 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
- H05K2201/10204—Dummy component, dummy PCB or template, e.g. for monitoring, controlling of processes, comparing, scanning
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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
- H05K3/3457—Solder materials or compositions; Methods of application thereof
- H05K3/3485—Applying solder paste, slurry or powder
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
Verfahren zur Herstellung einer Druckschablone (1) zur Aufbringung von Pads auf in einem bestimmten Muster angeordnete Kontaktstellen einer Leiterplatte (3) mit dreidimensionaler Oberflächenstruktur (4), wobei in ein Schablonenmaterial (2) auf dessen der Leiterplatte (3) zugewandten Schablonenseite ein Abbild der dreidimensionalen Oberflächenstruktur (4) der Leiterplatte (3) eingebracht wird, dadurch gekennzeichnet, – dass auf das Schablonenmaterial (2) auf dessen der Leiterplatte (3) zugewandten Schablonenseite eine verformbare Abformschicht (2c) aufgebracht wird, und – dass das Schablonenmaterial (2) unter Abformung der Oberflächenstruktur (4) der Leiterplatte (3) nur in die Abformschicht (2c) gegen die Leiterplatte (3) gepresst wird.Method for producing a printing stencil (1) for applying pads to contact points, arranged in a specific pattern, of a printed circuit board (3) with a three-dimensional surface structure (4), wherein a stencil material (2) has an image of the stencil side facing the printed circuit board (3) three-dimensional surface structure (4) of the printed circuit board (3) is introduced, characterized in that - on the stencil material (2) on the stencil side facing the printed circuit board (3) a deformable impression layer (2c) is applied, and - that the stencil material (2) under impression of the surface structure (4) of the printed circuit board (3) only in the impression layer (2c) against the printed circuit board (3) is pressed.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer Druckschablone zur Aufbringung von Pads, insbesondere Lot-, Druckpasten- oder Kleberdepots, auf eine Leiterplatte (printed circuit board, PCB) gemäß dem Oberbegriff des Anspruchs 1. Sie betrifft weiter eine nach dem Verfahren hergestellte Druckschablone.The invention relates to a method for producing a printing stencil for applying pads, in particular solder, printing paste or adhesive depots, on a printed circuit board (PCB) according to the preamble of
Eine derartige Druckschablone wird in der Leiterplattenbestückungstechnik für das Auftragen eines Druckmediums, insbesondere einer Lotpaste oder eines Klebers, zur Befestigung von SMD-Bauelementen (surface-mounted-device) auf Leiterplatten eingesetzt. Bei der Herstellung solcher Druckschablonen wird das Schablonenmaterial beispielsweise mittels Lasertechnik lokal derart abgetragen, dass dem gewünschten Druckbild bzw. einer bestimmten Druckstruktur entsprechende Drucköffnungen oder -kanäle entstehen, durch die das Druckmedium mittels beispielsweise einer sogenannten Rakel hindurch auf die Leiterplatten aufgebracht werden kann.Such a printing stencil is used in printed circuit board assembly technology for the application of a printing medium, in particular a solder paste or an adhesive, for the attachment of SMD components (surface-mounted-device) on printed circuit boards. In the production of such printing stencils, the stencil material is removed locally, for example by laser technology, so that the desired printed image or a specific printing structure is provided with corresponding printing apertures or channels through which the printing medium can be applied to the printed circuit boards by means of, for example, a so-called doctor blade.
Um hierbei örtlich unterschiedliche Mengen des Druckmediums auf die zu bedruckende Oberfläche (Leiterplatte) aufbringen zu können, sind sogenannte Stufenschablonen bekannt. Deren Schablonenmaterial ebenso wie das Schablonenmaterial einer nicht als Stufenschablonen ausgeführten Druckschablone weist üblicherweise einen zweischichtigen bzw. mehrschichtigen Aufbau mit einer druckseitigen Kunststoffschicht und mit einer siebdruck- oder rakelseitigen Metallfolie auf.In order to be able to apply locally different amounts of the printing medium to the surface to be printed (printed circuit board), so-called step stencils are known. Their stencil material as well as the stencil material of a stencil template not designed as stepped stencils usually has a two-layered or multi-layered construction with a pressure-side plastic layer and with a screen-printed or squeegee-side metal foil.
Zur Herstellung derartiger Stufenschablonen kann die Stufenbildung der ausgewählten Bereiche verringerter Materialdicke mittels Laserbearbeitung erfolgen, indem das Schablonenmaterial gemäß einer vorgegebenen Schablonenstruktur mittels ortsselektiver Laserbearbeitung ausgeschachtet wird, wobei im lokalen Schachtbereich die Metallunterschicht vollständig und die daran anschließende Kunststoff- oder Polyimidschicht lediglich über einen Bruchteil deren Schichtdicke abgetragen wird (
Die Kunststoffzwischenschicht der aus der
Aus der
Der Erfindung liegt daher die Aufgabe zugrunde, ein besonders geeignetes Verfahren zur Herstellung einer Druckschablone sowie eine danach hergestellte Druckschablone anzugeben.The invention is therefore based on the object of specifying a particularly suitable method for producing a printing stencil and a printing stencil produced thereon.
Bezüglich des Verfahrens wird diese Aufgabe mit den Merkmalen des Anspruchs 1 und hinsichtlich der Druckschablone mit den Merkmalen des Anspruchs 5 erfindungsgemäß gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen sind Gegenstand der Unteransprüche.With regard to the method, this object is achieved with the features of
Das Verfahren zur Herstellung einer Druckschablone zur Aufbringung von Pads auf in einem bestimmten Muster angeordnete Kontaktstellen einer Leiterplatte mit dreidimensionaler Oberflächenstruktur (PCB-Topologie) kennzeichnet sich dadurch aus, dass in ein Schablonenmaterial auf dessen der Leiterplatte zugewandten Schablonenseite ein Abbild der dreidimensionalen Oberflächenstruktur der Leiterplatte durch eine mechanische Abformung der Oberflächenstruktur eingebracht wird.The method for producing a printing template for applying pads to contact points of a printed circuit board having a three-dimensional surface structure (PCB topology) arranged in a specific pattern is characterized in that an image of the three-dimensional surface structure of the printed circuit board penetrates into a stencil material on its stencil side facing the printed circuit board a mechanical impression of the surface structure is introduced.
Zweckmäßigerweise wird auf das Schablonenmaterial auf dessen der Leiterplatte zugewandten Schablonenseite eine verformbare Abformschicht, insbesondere eine Kleberfolie, aufgebracht und das Schablonenmaterial, insbesondere inklusive einer Zwischenlage als Trennschicht, unter Abformung der Oberflächenstruktur der Leiterplatte in die Abformschicht gegen die Leiterplate gepresst. Das Material der Abformschicht ist vorzugsweise ausreichend flexibel und vorzugsweise plastisch verformbar sowie geeigneterweise selbstständig oder mit Hilfe von Zusatzmitteln, beispielsweise einer Temperierung, aushärtbar. Wesentlich ist, dass das Material der Abformschicht möglichst auch feinste Strukturen der Leiterplattenoberfläche ausreichend zuverlässig abformen kann.Expediently, a deformable impression layer, in particular an adhesive film, is applied to the stencil material on its stencil side facing the printed circuit board, and the stencil material, in particular including an intermediate layer as release layer, is molded into the surface structure of the printed circuit board Impression layer pressed against the printed circuit board. The material of the impression layer is preferably sufficiently flexible and preferably plastically deformable and suitably self-curing or with the aid of additives, for example a temperature, hardenable. It is essential that the material of the impression layer can as far as possible mold even the finest structures of the printed circuit board surface reliably.
Die Druckschablone ist zur Aufbringung von Pads, insbesondere Lot-, Druckpasten- oder Kleberdepots, auf in einem bestimmten Muster angeordnete Kontaktstellen einer, insbesondere in SMD-Technik zu bestückenden, Leiterplatte mit dreidimensionaler Oberflächenstruktur (PCB-Topologie) vorgesehen und eingerichtet. Hierzu umfasst die Druckschablone ein vorzugsweise mindestens zweischichtiges, insbesondere in einen Schablonenrahmen einspannbares oder eingespanntes Schablonenmaterial, das auf der der Leiterplatte zugewandten Schablonenseite ein Abbild der dreidimensionalen Oberflächenstruktur der Leiterplatte aufweist.The printing stencil is provided and arranged for applying pads, in particular solder, printing paste or adhesive depots, to contact points arranged in a specific pattern of a printed circuit board with a three-dimensional surface structure (PCB topology), in particular in SMD technology. For this purpose, the printing stencil comprises a preferably at least two-layered stencil material, which can be clamped or clamped in particular in a stencil frame and has an image of the three-dimensional surface structure of the printed circuit board on the stencil side facing the printed circuit board.
Zur Vermeidung eines Anhaftens der Abformschicht ist dem Schablonenmaterial auf der der Leiterplatte zugewandten Schablonenseite die separate Trennschicht, insbesondere in Form einer Trennfolie, zugeordnet. Diese möglichst dünne Trennfolie bzw. Trennschicht stellt eine Isolierung der Abformschicht gegenüber der Leiterplatte her. Zudem kann durch die Wahl geeigneter Schichtdicken der Trennschicht auf typischerweise praktisch unvermeidbare Fertigungstoleranzen bei der Herstellung von Leiterplatten reagiert werden, die vermittels der Druckschablone mit derselben Druckstruktur zu bedrucken sind und dabei unterschiedliche Toleranzen aufweisen.In order to avoid adhesion of the impression layer, the stencil material on the stencil side facing the printed circuit board is assigned the separate separation layer, in particular in the form of a release film. This thin separating film or separating layer produces an insulation of the impression layer with respect to the printed circuit board. In addition, by choosing suitable layer thicknesses of the separating layer, it is possible to respond to typically practically unavoidable production tolerances in the production of printed circuit boards which are to be printed by means of the printing stencil with the same printing structure and have different tolerances.
Das Schablonenmaterial ist geeigneterweise aus einer Polyimidschicht mit einer Schichtdicke zwischen 50 μm und 150 μm und einer Metalloberschicht mit einer Schichtdicke zwischen 15 μm und 25 μm gefertigt. Die Schichtdicke einer gegebenenfalls vorgesehenen Metallunterschicht kann zwischen 5 μm und 10 μm im Falle der Verwendung einer Metallfolie oder kleiner oder gleich 1 μm bei Auftragung einer Metallisierungsbeschichtung betragen. Bei der Verwendung von Metall- bzw. Kunststofffolien sind diese geeigneterweise miteinander verklebt. Hierbei beträgt die Schichtdicke einer geeigneten Klebeschicht zwischen 2 μm und 12 μm, vorzugsweise etwa 5 μm. In dieses oder ein anderes Schablonenmaterial ist ein auf die Leiterplatte aufzubringendes Druckbild der Pads einbringbar oder zumindest teilweise bereits eingebracht, bevor oder nachdem das Schablonenmaterial mit dem Abbild der Oberflächenstruktur der Leiterplatte versehen ist.The stencil material is suitably made of a polyimide layer with a layer thickness between 50 μm and 150 μm and a metal top layer with a layer thickness between 15 μm and 25 μm. The layer thickness of an optionally provided metal underlayer can be between 5 μm and 10 μm in the case of the use of a metal foil or less than or equal to 1 μm when a metallization coating is applied. When using metal or plastic films, these are suitably glued together. Here, the layer thickness of a suitable adhesive layer is between 2 .mu.m and 12 .mu.m, preferably about 5 .mu.m. In this or another template material to be applied to the circuit board printed image of the pads is introduced or at least partially introduced before or after the stencil material is provided with the image of the surface structure of the circuit board.
Eine Druckvorrichtung, die im Wesentlichen aus einer Leiterplatte mit dreidimensionaler Oberflächenstruktur (PCB-Topologie) und einer Druckschablone besteht, weist zur Aufbringung von Pads auf in einem bestimmten Muster angeordnete Kontaktstellen der Leiterplatte ein Schablonenmaterial auf, in welches ein auf die Leiterplatte aufzubringendes Druckbild einbringbar oder zumindest teilweise eingebracht ist, wobei das Schablonenmaterial auf der der Leiterplatte zugewandten Schablonenseite ein Abbild der dreidimensionalen Oberflächenstruktur der Leiterplatte aufweist.A printing device, which essentially consists of a printed circuit board with a three-dimensional surface structure (PCB topology) and a printing stencil, has a stencil material for applying pads to contact points of the printed circuit board arranged in a specific pattern, into which a printed image to be applied to the printed circuit board can be introduced or is at least partially introduced, wherein the stencil material on the circuit board facing template side has an image of the three-dimensional surface structure of the circuit board.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass eine Druckschablone, in deren Schablonenmaterial die Oberflächenstruktur einer zu bedruckenden und anschließend mittels elektronischer Bauteilen zu bestückenden Leiterplatte (PCB-Topologie) eingebracht ist, eine einerseits vergleichsweise präzise Handhabung und andererseits ein verbessertes Druckbild im Zuge des Aufbringens der Pads (Lot- oder Kleberpaste) ermöglicht ist. Insbesondere eine (mechanische) Abformung der Oberflächenstruktur der Leiterplatte in eine hierzu zusätzlich vorgesehene Abformschicht des Schablonenmaterials ermöglicht sowohl eine besonders einfache Herstellung der Druckschablone beziehungsweise deren Schablonenmaterials als auch auf besonders effektive Weise die Berücksichtigung von Fertigungstoleranzen der zu bedruckenden Leiterplatten. Hierzu ist lediglich eine Trennschicht in Form vorzugsweise einer Folie bereit zu stellen, die einerseits eine die zu erwartenden Fertigungstoleranzen berücksichtigende Schichtdicke aufweist. Andererseits verhindert die Trennschicht ein Anhaften des mit der Abformschicht versehenen Schablonenmaterials an der Leiterplatte im Zuge der Abformung deren Oberflächenstruktur, so dass die Trennschicht eine Doppelfunktion übernimmt.The advantages achieved by the invention are in particular that a stencil in the stencil material, the surface structure of a to be printed and then loaded by electronic components printed circuit board (PCB topology) is introduced, on the one hand comparatively precise handling and on the other hand, an improved print image in the course the application of the pads (solder or adhesive paste) is possible. In particular, a (mechanical) impression of the surface structure of the circuit board in an additionally provided for this Abformschicht the template material allows both a particularly simple production of the stencil or stencil material as well as in a particularly effective way, the consideration of manufacturing tolerances of the printed circuit boards. For this purpose, it is merely necessary to provide a separating layer in the form of a film, which on the one hand has a layer thickness which takes into account the expected manufacturing tolerances. On the other hand, the release layer prevents the stencil material provided with the impression layer from adhering to the printed circuit board in the course of the molding process, so that the interface layer assumes a dual function.
Aufgrund der Einbringung des Abbildes der dreidimensionalen Oberflächenstruktur der Leiterplatte (PCB-Topologie) quasi als Negativ in das Schablonenmaterial beziehungsweise in deren Abformschicht ist eine präzise Lagepositionierung der Druckschablone auf der zu bedruckenden Leiterplatte sichergestellt, indem die bestimmungsgemäß positionierte Leiterplatte sich praktisch vollflächig auf der Leiterplatte abstützt und an praktisch allen Erhebungen und Vertiefungen der Leiterplattenoberfläche anliegt.Due to the incorporation of the image of the three-dimensional surface structure of the printed circuit board (PCB topology) quasi negative in the stencil material or in its impression layer a precise positioning of the stencil printing on the printed circuit board is ensured by the intended positionally positioned printed circuit board is almost fully supported on the circuit board and abuts virtually all elevations and depressions of the circuit board surface.
Im Zuge des Druckvorgangs, bei dem typischerweise mittels eines Rakels das Lot- oder Klebermaterial über die bestimmungsgemäßen Druck- und/oder Sieböffnungen im Schablonenmaterial auf die entsprechenden Kontaktstellen der Leiterplatte aufgebracht wird, entstehen praktisch keinerlei Verformungen des Schablonenmaterials, was wiederum eine besonders exakte Aufbringung des Druckmaterials (Lot- oder Kleberpaste) auf die bestimmungsgemäßen Kontaktstellen der Leiterplatte sicher stellt. Die Folge sind besonders exakte und stets gleichermaßen reproduzierbare Druckbilder unter Vermeidung eines Hinterlaufens des Druckmaterials an bestimmten Stellen der Drucköffnungen zwischen die Schablonenunterseite und die Leiterplattenoberfläche.In the course of the printing process, in which typically by means of a squeegee, the solder or adhesive material is applied to the appropriate contact points of the circuit board on the intended pressure and / or screen openings in the stencil material, virtually no deformation of the stencil material, resulting in a particularly accurate application of the Print material (solder or adhesive paste) on the intended contact points of the circuit board ensures. The result is particularly accurate and always equally reproducible print images while avoiding a run-behind of the printing material at certain points of the printing openings between the stencil base and the circuit board surface.
Nachfolgen wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert, darin zeigen:An exemplary embodiment of the invention will be explained in more detail with reference to a drawing, in which:
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.
Die Druckschablone
Beim bestimmungsgemäßen Gebrauch der Druckschablone
Claims (5)
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DE102013020189.6A DE102013020189B4 (en) | 2013-12-02 | 2013-12-02 | Printing template and method for its production |
DE201320011955 DE202013011955U1 (en) | 2013-12-02 | 2013-12-02 | stencil |
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DE102013020189.6A DE102013020189B4 (en) | 2013-12-02 | 2013-12-02 | Printing template and method for its production |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE4016992A1 (en) * | 1990-05-26 | 1991-11-28 | Bosch Gmbh Robert | Printing screen for electric elements on irregular boards - is shaped by inelastic imprint from rubber overlay for fitting to areas between crossing structures |
US20040183186A1 (en) * | 2003-03-20 | 2004-09-23 | Alps Electric Co., Ltd. | Low-profile electronic circuit module and method for manufacturing the same |
US20100139561A1 (en) * | 2008-12-10 | 2010-06-10 | Bloom Terry R | Counter sunk screen |
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DE202010006945U1 (en) | 2010-05-18 | 2011-10-07 | Cadilac Laser Gmbh Cad Industrial Lasercutting | stencil |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE4016992A1 (en) * | 1990-05-26 | 1991-11-28 | Bosch Gmbh Robert | Printing screen for electric elements on irregular boards - is shaped by inelastic imprint from rubber overlay for fitting to areas between crossing structures |
US20040183186A1 (en) * | 2003-03-20 | 2004-09-23 | Alps Electric Co., Ltd. | Low-profile electronic circuit module and method for manufacturing the same |
US20100139561A1 (en) * | 2008-12-10 | 2010-06-10 | Bloom Terry R | Counter sunk screen |
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