EP0259709A2 - Method for producing conductive and/or resistive paths on a substrate, and potentiometer manufactured thereby - Google Patents
Method for producing conductive and/or resistive paths on a substrate, and potentiometer manufactured thereby Download PDFInfo
- Publication number
- EP0259709A2 EP0259709A2 EP87112459A EP87112459A EP0259709A2 EP 0259709 A2 EP0259709 A2 EP 0259709A2 EP 87112459 A EP87112459 A EP 87112459A EP 87112459 A EP87112459 A EP 87112459A EP 0259709 A2 EP0259709 A2 EP 0259709A2
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- European Patent Office
- Prior art keywords
- intermediate carrier
- substrate
- resistance
- track
- potentiometer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/30—Adjustable resistors the contact sliding along resistive element
- H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path
- H01C10/34—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path the contact or the associated conducting structure riding on collector formed as a ring or portion thereof
Definitions
- the invention relates to a method for producing conductor tracks and / or resistance tracks on a substrate, the guide tracks and / or resistance tracks being first completed on an intermediate carrier, then the substrate is connected to the conductor track and / or resistance track adhering to the intermediate carrier and finally the intermediate carrier is separated from the interconnect and / or resistance track.
- the invention further relates to a potentiometer produced by this method.
- EP-O 0 157 666 A1 describes a rotatable potentiometer in which a resistance track is arranged on the inner wall of an approximately cylindrical space.
- the object of the invention is to propose a method of the type mentioned at the outset, with which conductor tracks and / or resistance tracks can be produced on a concavely curved wall surface.
- the above object is achieved in a method of the type mentioned at the outset in that a cylindrical or conical body is used as the intermediate carrier, on the outer circumference of which the conductor and / or resistance track is produced, by the circumference of the guide and / or resistance track supporting intermediate body, the substrate is applied and cured and that the intermediate carrier is then removed.
- This method easily creates a substrate with a cylindrical or conical interior, on the wall of which the conductor and / or resistance track is arranged.
- the substrate is applied at a temperature higher than the ambient temperature and the coefficient of thermal expansion of the intermediate carrier is chosen to be higher than that of the substrate. It is thereby achieved that the intermediate carrier can be easily pulled out of the substrate after cooling.
- the intermediate carrier preferably consists of metal in a manner known per se and is provided with an oxide layer as a separating layer. This favors the separation of the conductor and / or resistance path in the substrate from the intermediate carrier.
- the intermediate carrier can also consist of a thermoplastic.
- the substrate is preferably formed from a thermosetting plastic molding compound.
- the substrate can then simultaneously form a stable housing.
- a potentiometer manufactured according to the above-mentioned method is characterized in that the substrate forms the housing of the potentiometer and encloses a cylindrical cavity, on the inner wall of which the conducting and resistance tracks are provided, and in that a tapping part which is rotatable about its central axis is mounted in the cavity contacted the conductive and resistance tracks.
- the conductive and resistance tracks are extremely smooth and fit into the substrate or housing without steps. As a result, the wear is correspondingly low.
- the conductive and resistance tracks do not extend on concentric, radial circular ring surfaces, but on the inner wall of the cylindrical cavity of the housing.
- the equipotential lines run parallel, so that a comparatively higher electrical load capacity is achieved. This arrangement also reduces mechanical stresses between the inner wall and the webs as a result of temperature fluctuations.
- the potentiometer can be constructed with an extremely small diameter.
- the tracks in the housing are protected against external influences.
- a cylindrical intermediate carrier (1) consists of metal, for example bronze (cf. FIG. 1).
- An oxide layer (2) is built up on this.
- a polymer thick film conductive paste (3) is printed on the oxide layer (2), for example using the screen printing method. This is dried in at around 120 ° C.
- a polymer thick film poaching paste (4) is then printed on.
- a round screen printing machine is suitable for printing. The printed screen printing pastes are cured at a temperature up to 250 ° C.
- the intermediate carrier (1) is then inserted into a press tool of a plastic press and overmolded with a poly press compound (5) at about 150 ° C.
- This forms the substrate for the conductive or resistance tracks (3 ⁇ , 4 ⁇ ) consisting of the conductive paste (3) or the poaching paste (4) and the housing (5 ⁇ ) of the potentiometer described in more detail below.
- the coefficient of thermal expansion of the bronze intermediate carrier (1) is greater than that of the housing (5 ⁇ ) formed by the polyester molding compound (5).
- the intermediate carrier (1) can be pulled out of the housing (5 () axially in the direction of the arrow (P).
- the conductive or resistance layer tracks (3 ⁇ , 4 ⁇ ) adhere to the inner wall of the housing (5 ⁇ ) because there is greater adhesion between them and the polyester plastic of the housing (5 ⁇ ) than between the intermediate carrier (1) and its Oxide layer (2).
- oxide layer (2) is etched.
- the intermediate carrier (1) consists of a high-temperature-resistant thermoplastic, such as linear polyester, or polyimide, or polyamide or also polyphenylene sulfide.
- a separation layer (2) there is no need to build up a separation layer (2) here.
- the curing temperature for the polymer thick film pastes (3, 4) should be set lower; it does not regularly exceed 180 ° C.
- the removal of the intermediate carrier (1) from the housing (5 ⁇ ) formed by the hardened polyester molding compound (5) can be facilitated in that the intermediate carrier (1) is made slightly conical or conical.
- the intermediate carrier (1) need not be a cylindrical solid body. It can also be formed by a tube.
- a potentiometer is constructed approximately as follows (cf. FIGS. 3, 4):
- the housing (5 ⁇ ) formed by the polyester molding compound (5) has a cylindrical interior (6), around the inner wall (7) of which the lead strip (3 ⁇ ) and the resistance strip (4 ⁇ ) extend.
- a bearing shell (8) is formed on the closed bottom of the housing (5 ⁇ ) by a corresponding design of the intermediate carrier (1).
- the inside diameter of the interior (6) has a diameter of only 7 mm, for example.
- a tapping part (9) is inserted into the interior (6) and engages with the bearing journal (10) in the bearing shell (8).
- Several grinders (11) are attached to the circumference of the tapping part (9).
- the grinders (11) are partially assigned to the interconnect (3 ⁇ ) and partially to the resistance track (4 ⁇ ).
- the grinders (11) are electrically connected to one another. Connections (12) of the interconnect (3 ⁇ ) and the resistance track (4 ⁇ ) are led through the housing (5 ⁇ ) to the outside.
- the connections (12) can also be injected during the manufacture of the housing (5 ⁇ ).
- the housing (5 ⁇ ) is closed by means of a cover (13) which has a recess for the passage of a handle part (14) of the tap part (9).
- the equipotential lines on the resistance track (4 ⁇ ) run parallel to the axis of rotation - not radial to this - and parallel to each other.
- the resilience of the resistance track (4 ⁇ ) is comparatively large.
- a good thing about this arrangement of the resistance track (4 ⁇ ) is that tolerances in the alignment of the tapping part (9) have hardly any effect on the resistance setting.
- a projection (15) is formed thereon. This is assigned a stop (16) in the interior (6).
- the stop (16) is created by a corresponding shape of the intermediate carrier (1) when it is encapsulated with the molding compound (5).
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Adjustable Resistors (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Leit- und/oder Widerstandsbahnen an einem Substrat, wobei zunächst die Leit- und/oder Widerstandsbahnen auf einem Zwischenträger fertiggestellt werden, danach das Substrat mit der auf dem Zwischenträger haftenden Leit- und/oder Widerstandsbahn verbunden wird und schließlich der Zwischenträger von der Leit- und/oder Widerstandsbahn getrennt wird. Weiterhin betrifft die Erfindung ein nach diesem Verfahren hergestelltes Potentiometer.The invention relates to a method for producing conductor tracks and / or resistance tracks on a substrate, the guide tracks and / or resistance tracks being first completed on an intermediate carrier, then the substrate is connected to the conductor track and / or resistance track adhering to the intermediate carrier and finally the intermediate carrier is separated from the interconnect and / or resistance track. The invention further relates to a potentiometer produced by this method.
Ein Verfahren der genannten Art ist in der DE-OS 33 22 382 beschrieben. Bei diesem Umkehrlaminierverfahren ist von einem ebenen Zwischenträger ausgegangen. Dementsprechend verlaufen die Leit- und Widerstandsbahnen in einer Ebene.A method of the type mentioned is described in DE-OS 33 22 382. This reverse lamination process is based on a flat intermediate carrier. Accordingly, the conductive and resistance tracks run on one level.
In der EP-O 0 157 666 A1 ein drehbares Potentiometer beschrieben, bei dem an der Innenwand eines etwa zylindrischen Raumes eine Widerstandsbahn angeordnet ist.EP-O 0 157 666 A1 describes a rotatable potentiometer in which a resistance track is arranged on the inner wall of an approximately cylindrical space.
Aufgabe der Erfindung ist es, ein Verfahren der eingangs genannten Art vorzuschlagen, mit dem Leit- und/oder Widerstandsbahnen an einer konkav gewölbten Wandfläche herstellbar sind.The object of the invention is to propose a method of the type mentioned at the outset, with which conductor tracks and / or resistance tracks can be produced on a concavely curved wall surface.
Erfindungsgemäß ist obige Aufgabe bei einem Verfahren der eingangs genannten Art dadurch gelöst, daß als Zwischenträger ein zylindrischer oder kegelförmiger Körper verwendet wird, auf dessen Außenumfang die Leit- und/oder Widerstandsbahn gefertigt wird, daß um den Umfang des die Leit- und/oder Widerstandsbahn tragenden Zwischenkörpers das Substrat aufgebracht und ausgehärtet wird und daß danach der Zwischenträger abgezogen wird.According to the invention, the above object is achieved in a method of the type mentioned at the outset in that a cylindrical or conical body is used as the intermediate carrier, on the outer circumference of which the conductor and / or resistance track is produced, by the circumference of the guide and / or resistance track supporting intermediate body, the substrate is applied and cured and that the intermediate carrier is then removed.
Durch dieses Verfahren ist auf einfache Weise ein Substrat mit eimen zylindrischen bzw. kegelförmigen Innenraum geschaffen, an dessen wand die Leit- und/oder Widerstandsbahn angeordnet ist.This method easily creates a substrate with a cylindrical or conical interior, on the wall of which the conductor and / or resistance track is arranged.
In Weiterbildung der Erfindung erfolgt das Aufbringen des Substrats bei einer höheren als der Umgebungstemperatur und der Wärmeausdehnungskoeffizient des Zwischenträgers wird höher gewält als der des Substrats. Dadurch ist erreicht, daß sich nach dem Abkühlen der Zwischenträger leicht aus dem Substrat herausziehen läßt.In a further development of the invention, the substrate is applied at a temperature higher than the ambient temperature and the coefficient of thermal expansion of the intermediate carrier is chosen to be higher than that of the substrate. It is thereby achieved that the intermediate carrier can be easily pulled out of the substrate after cooling.
Vorzugweise besteht der Zwischenträger in an sich bekannter Weise aus Metall und ist mit einer Oxidschicht als Trennschicht versehen. Dies begünstigt die Trennung der Leit- und/oder Widerstandsbahn im Substrat vom Zwischenträger. In anderer Ausgestaltung der Erfindung kann der Zwischenträger auch aus einem thermoplastischen Kunststoff bestehen.The intermediate carrier preferably consists of metal in a manner known per se and is provided with an oxide layer as a separating layer. This favors the separation of the conductor and / or resistance path in the substrate from the intermediate carrier. In another embodiment of the invention, the intermediate carrier can also consist of a thermoplastic.
Das substrat wird vorzugsweise aus einer wärmehärtbaren Kunststoffformmasse gebildet. Das Substrat kann dann zugleich ein stabiles Gehäuse bilden.The substrate is preferably formed from a thermosetting plastic molding compound. The substrate can then simultaneously form a stable housing.
Ein nach dem genannten Verfahren hergestelltes Potentiometer zeichnet sich dadurch aus, daß das Substrat das Gehäuse des Potentiometers bildet und einen zylindrischen Hohlraum umschließt, an dessen Innenwand die Leit- und Widerstandsbahnen vorgesehen sind und daß im Hohlraum ein um dessen Mittelachse drehbares Abgriffsteil gelagert ist, das die Leit- und Widerstandsbahnen kontaktiert.A potentiometer manufactured according to the above-mentioned method is characterized in that the substrate forms the housing of the potentiometer and encloses a cylindrical cavity, on the inner wall of which the conducting and resistance tracks are provided, and in that a tapping part which is rotatable about its central axis is mounted in the cavity contacted the conductive and resistance tracks.
Bei einem derartigen Bauteil sind die Leit- und Widerstandsbahnen extrem glatt und fügen sich ohne Stufen in das Substrat bzw. Gehäuse ein. Dadurch ist der Verschleiß entsprechend gering.With such a component, the conductive and resistance tracks are extremely smooth and fit into the substrate or housing without steps. As a result, the wear is correspondingly low.
Die Leit- und Widerstandsbahnen erstrecken sich nicht auf konzentrischen, radialen Kreisringflächen, sondern an der Innenwand des zylindrischen Hohlraums des Gehäuses. Die Äquipotentiallinien verlaufen dabei parallel, so daß eine vergleichsweise höhere elektrische Belastbarkeit erreicht ist. Durch diese Anordnung sind auch mechanische Spannungen zwischen der Innenwand und den Bahnen infolge von Temperaturschwankungen herabgesetzt.The conductive and resistance tracks do not extend on concentric, radial circular ring surfaces, but on the inner wall of the cylindrical cavity of the housing. The equipotential lines run parallel, so that a comparatively higher electrical load capacity is achieved. This arrangement also reduces mechanical stresses between the inner wall and the webs as a result of temperature fluctuations.
Da sich die Bahnen nicht radial erstrecken, ist ein im Durchmesser äußerst kleiner Aufbau des Potentiometers möglich. Außerdem liegen die Bahnen im Gehäuse gegen äußere Einflüsse geschützt.Since the tracks do not extend radially, the potentiometer can be constructed with an extremely small diameter. In addition, the tracks in the housing are protected against external influences.
Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung von Ausführungsbeispielen.Further advantageous embodiments of the invention result from the subclaims and the following description of exemplary embodiments.
In der Zeichnung zeigen:
Figur 1 einen Zwischenträger mit aufgedruckter Leit- und Widerstandsbahn,Figur 2 den Zweischenträger nachFigur 1 mit dem Substrat umspritzt im Teilschnitt,Figur 3 ein Potentiometer mit dem Substrat bzw. Gehäuse nachFigur 2
undFigur 4 einem Schnitt längs der Linie IV-IV nachFigur 3.
- FIG. 1 shows an intermediate carrier with a printed conductor and resistance track,
- FIG. 2 is a partial section of the double carrier according to FIG. 1 with the substrate overmolded,
- 3 shows a potentiometer with the substrate or housing according to FIG. 2
and - 4 shows a section along the line IV-IV of Figure 3.
Ein zylindrischer Zwischenträger (1) besteht aus Metall, beispielsweise aus Bronze (vgl. Figur 1). Auf diesem wird eine Oxidschicht (2) aufgebaut. Auf die Oxidschicht (2) wird, beispielsweise im Siebdruckverfahren, eine Polymer-Dickfilm-Leitpaste (3) aufgedruckt. Diese wird bei etwa 120°C eingetrocknet. Anschließend wird eine Polymer-Dickfilm-Wilderstandspaste (4) aufgedruckt. Zum Bedrucken eignet sich eine Rund-Siebdruckmaschine. Die aufgedruckten Siebdruckpasten werden bei einer Temperatur bis zu 250°C ausgehärtet.A cylindrical intermediate carrier (1) consists of metal, for example bronze (cf. FIG. 1). An oxide layer (2) is built up on this. A polymer thick film conductive paste (3) is printed on the oxide layer (2), for example using the screen printing method. This is dried in at around 120 ° C. A polymer thick film poaching paste (4) is then printed on. A round screen printing machine is suitable for printing. The printed screen printing pastes are cured at a temperature up to 250 ° C.
Danach wird der Zwischenträger (1) in ein Preßwerkzeug einer Kunststoffpresse eingesetzt und mit einer Poly-Preßmasse (5) bei etwa 150°C umspritzt. Diese bildet das Substrat für die aus der Leitpaste (3) bzw. der Wilderstandspaste (4) bestehenden Leit- bzw. Widerstandsbahnen (3ʹ, 4ʹ) und das Gehäuse (5ʹ) des unten näher beschriebenen Potentiometers.The intermediate carrier (1) is then inserted into a press tool of a plastic press and overmolded with a poly press compound (5) at about 150 ° C. This forms the substrate for the conductive or resistance tracks (3ʹ, 4ʹ) consisting of the conductive paste (3) or the poaching paste (4) and the housing (5ʹ) of the potentiometer described in more detail below.
Der Wärmeausdehnungskoeffizient des Bronze-Zwischenträgers (1) ist größer als der des von der Polyester-Preßmasse (5) gebildeten Gehäuses (5ʹ). Nach dem Abkühlen des Preßlings (vgl. Figur 2) läßt sich der Zwischenträger (1) axial in Richtung des Pfeiles (P) aus dem Gehäuse (5ʹ) herausziehen. Dabei bleiben die Leit- bzw. Widerstandsschichtbahnen.(3ʹ,4ʹ) an der Innenwand des Gehäuses (5ʹ) haften, weil zwischen ihnen und dem Polyester-Kunststoff des Gehäuses (5ʹ) eine größere Adhäsion besteht als zwischen dem Zwischenträger (1) und dessen Oxidschicht (2).The coefficient of thermal expansion of the bronze intermediate carrier (1) is greater than that of the housing (5ʹ) formed by the polyester molding compound (5). After the compact has cooled (see FIG. 2), the intermediate carrier (1) can be pulled out of the housing (5 () axially in the direction of the arrow (P). The conductive or resistance layer tracks (3ʹ, 4ʹ) adhere to the inner wall of the housing (5ʹ) because there is greater adhesion between them and the polyester plastic of the housing (5ʹ) than between the intermediate carrier (1) and its Oxide layer (2).
Schließlich wird die Oxidschicht (2) obgeätzt.Finally the oxide layer (2) is etched.
Bei einem anderen Ausführungsbeispiel der Erfindung besteht der Zwischenträger (1) aus einem hochtemperaturbeständigen Thermoplast, wie lineares Polyester, oder Polyimid, oder Polyamid oder auch Polyphenylensulfid. Der Aufbau einer Trennschicht (2) erübrigt sich hier. Die Aushärttemperatur für die Polymer-Dickfilmpasten (3, 4) ist in diesem Fall niedriger anzusetzen, sie übersteigt regelmäßig nicht 180°C.In another embodiment of the invention, the intermediate carrier (1) consists of a high-temperature-resistant thermoplastic, such as linear polyester, or polyimide, or polyamide or also polyphenylene sulfide. There is no need to build up a separation layer (2) here. In this case, the curing temperature for the polymer thick film pastes (3, 4) should be set lower; it does not regularly exceed 180 ° C.
Das Entnehmen des Zwischenträgers (1) aus dem von der ausgehärten Polyester-Preßmasse (5) gebildeten Gehäuse (5ʹ) läßt sich dadurch erleichtern, daß der Zwischenträger (1) geringfügig kegelförmig bzw. konisch ausgebildet wird.The removal of the intermediate carrier (1) from the housing (5ʹ) formed by the hardened polyester molding compound (5) can be facilitated in that the intermediate carrier (1) is made slightly conical or conical.
Der Zwischenträger (1) braucht kein zylindrischer Vollkörper zu sein. Er kann auch von einem Rohr gebildet sein.The intermediate carrier (1) need not be a cylindrical solid body. It can also be formed by a tube.
Ein Potentiometer ist unter Verwendung des in der beschriebenen Weise hergestellten Gehäuses (5ʹ) etwa folgendermaßen aufgebaut (vgl. Figur 3, 4):Using the housing (5 aufgebaut) produced in the manner described, a potentiometer is constructed approximately as follows (cf. FIGS. 3, 4):
Das von der Polyester-Preßmasse (5) gebildete Gehäuse (5ʹ) weist einen zylindrischen Innenraum (6) auf, um dessen Innenwand (7) sich die Lietbahn (3ʹ) und die Widerstandsbahn (4ʹ) erstrecken. Durch eine entsprechende Formgestaltung des Zwischenträgers (1) ist am geschlossenen Boden des Gehäuses (5ʹ) eine Lagerschale (8) ausgebildet. Der Innendurchmesser des Innenraums (6) weist beispielsweise einen Durchmesser von nur 7 mm auf.The housing (5ʹ) formed by the polyester molding compound (5) has a cylindrical interior (6), around the inner wall (7) of which the lead strip (3ʹ) and the resistance strip (4ʹ) extend. A bearing shell (8) is formed on the closed bottom of the housing (5ʹ) by a corresponding design of the intermediate carrier (1). The inside diameter of the interior (6) has a diameter of only 7 mm, for example.
In den Innenraum (6) ist ein Abgriffsteil (9) eingesetzt, das mit dem Lagerzapfen (10) in die Lagerschale (8) greift. Am Umfang des Abgriffsteils (9) sind mehrere Schleifer (11) befestigt. Die Schleifer (11) sind teilweise der Leitbahn (3ʹ) und teilweise der Widerstandsbahn (4ʹ) zugeordnet. Die Schleifer (11) sind elekrisch miteinander verbunden. Anschlüsse (12) der Leitbahn (3ʹ) und der Widerstandsbahn (4ʹ) sind durch das Gehäuse (5ʹ) nach außen geführt. Die Anschlüsse (12) können bei der Herstellung des Gehäuses (5ʹ) miteingespritzt sein.A tapping part (9) is inserted into the interior (6) and engages with the bearing journal (10) in the bearing shell (8). Several grinders (11) are attached to the circumference of the tapping part (9). The grinders (11) are partially assigned to the interconnect (3ʹ) and partially to the resistance track (4ʹ). The grinders (11) are electrically connected to one another. Connections (12) of the interconnect (3ʹ) and the resistance track (4ʹ) are led through the housing (5ʹ) to the outside. The connections (12) can also be injected during the manufacture of the housing (5ʹ).
Das Gehäuse (5ʹ) ist mittels eines Deckels (13) verschlossen, welcher eine Ausnehmung für den Durchtritt eines Griffteils (14) des Abgriffsteils (9) aufweist.The housing (5ʹ) is closed by means of a cover (13) which has a recess for the passage of a handle part (14) of the tap part (9).
Die Äquipotentiallinien auf der Widerstandsbahn (4ʹ) verlaufen parallel zur Drehachse - nicht radial zu dieser - und parallel zueinander. Die Belastbarkeit der Widerstandsbahn (4ʹ) ist dabei vergleichsweise groß. Außerdem ergibt sich eine hohe Auflösung des Widerstandsbereischs beim Drehen der Schleifer (11) längs der Widerstandsbahn (4ʹ). Günstig an dieser Anordnung der Widerstandsbahn (4ʹ) ist auch, daß Toleranzen der Ausrichtung des Abgriffsteils (9) sich kaum auf die Widerstandseinstellung auswirken.The equipotential lines on the resistance track (4ʹ) run parallel to the axis of rotation - not radial to this - and parallel to each other. The resilience of the resistance track (4ʹ) is comparatively large. In addition, there is a high resolution of the resistance area when turning the grinder (11) along the resistance path (4ʹ). A good thing about this arrangement of the resistance track (4ʹ) is that tolerances in the alignment of the tapping part (9) have hardly any effect on the resistance setting.
Die radiale Anordnung von Schleifer (11) und Liet- bzw. Wilderstandsbahn (3ʹ, 4ʹ) sichert auch bei hoher Drehgeschwindigkeit des Abgriffsteils (9) deren kontakt zueinander.The radial arrangement of grinder (11) and Liet or Wilderstandsbahn (3ʹ, 4ʹ) ensures their contact with each other even at high rotational speed of the tapping part (9).
Zur Begrenzung des Drehwinkels des Abgriffsteils (9) ist an diesem ein Vorsprung (15) ausgebildet. Diesem ist ein Anschlag (16) im Inneraum (6) zugeordnet. Der Anschlag (16) ist durch eine entsprechender Formgestalt des Zwischenträgers (1) bei dessen Umspritzen mit der Preßmasse (5) geschaffen.To limit the angle of rotation of the tapping part (9), a projection (15) is formed thereon. This is assigned a stop (16) in the interior (6). The stop (16) is created by a corresponding shape of the intermediate carrier (1) when it is encapsulated with the molding compound (5).
- 1 Zwischenträger1 intermediate beam
- 2 Oxidschicht2 oxide layer
- 3 Leitpaste3 conductive paste
- 3ʹ Leitbahn3ʹ interconnect
- 4 Widerstandspaste4 resistance paste
- 4ʹ Widerstandsbahn4ʹ resistance track
- 5 Polyester-Preßmasse5 polyester molding compound
- 5ʹ Gehäuse5ʹ housing
- 6 Innenraum6 interior
- 7 Innenwand7 inner wall
- 8 Lagerschale8 bearing shell
- 9 Abgriffsteil9 tap part
- 10 Lagerzapfen10 journals
- 11 Schleifer11 grinders
- 12 Anschlüsse12 connections
- 13 Deckel13 lid
- 14 Griffteil14 grip part
- 15 Vorsprung15 head start
- 16 Anschlag16 stop
- P PfeilP arrow
Claims (10)
dadurch gekennzeichnet,
daß als Zwischenträger ein zylindrischer oder kegelförmiger Körper verwendet wird, auf dessen Außenumfang die Leit- und/oder Widerstandsbahn gefertigt wird, daß um den Umfang des die Leit- und/oder Widerstandsbahn tragenden Zwischenträgers das Substrat aufgebracht und ausgehärtet wird und daß danach der Zwischenträger abgezogen wird.1. A method for producing conductor tracks and / or resistance tracks on a substrate, the soldering track and / or resistance track being first completed on an intermediate carrier, then the substrate is connected to the conductor track and / or resistance track adhering to the intermediate carrier and finally the intermediate carrier is separated from the conductor track and / or resistance track,
characterized,
that a cylindrical or conical body is used as the intermediate carrier, on the outer circumference of which the conductor and / or resistance track is produced, that the substrate is applied and cured around the circumference of the intermediate carrier and / or resistance path and that the intermediate carrier is then removed becomes.
dadurch gekennzeichnet,
daß das Aufbringen des Substrats bei einer höheren als der Umgebungstemperatur erfolgt und daß der Wärmeausdehnungskoeffizient des Zwischenträgers höher als der des Substrats gewählt wird.2. The method according to claim 1,
characterized,
that the application of the substrate takes place at a temperature higher than the ambient temperature and that the coefficient of thermal expansion of the intermediate carrier is chosen to be higher than that of the substrate.
dadurch gekennzeichnet,
daß der Zwischenträger aus Metall besteht und mit einer Oxidschicht als Trennschicht versehen wird.3. The method according to claim 1 or 2,
characterized,
that the intermediate carrier consists of metal and is provided with an oxide layer as a separating layer.
dadurch gekennzeichnet,
daß der Zwischenträger aus einem thermoplastischen Kunststoff besteht.4. The method according to claim 1 or 2,
characterized,
that the intermediate carrier consists of a thermoplastic.
dadurch gekennzeichnet,
daß das Substrat aus einer wärmehärtbaren Kunststofformmasse gebildet wird.5. The method according to any one of the preceding claims,
characterized,
that the substrate is formed from a thermosetting plastic molding compound.
dadurch gekennzeichnet,
daß der Zwischenträger von einem Rohr gebildet ist.6. The method according to any preceding claim,
characterized,
that the intermediate carrier is formed by a tube.
hergestellt nach einem Verfahren eines der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Substrat das Gehäuse (5ʹ) des Potentiometers bildet und einem zylindrischen Hohlraum (6) umschließt, an dessen Innenwand (7) die Leit- und/oder Widerstandsbahnen (3ʹ, 4ʹ) vorgesehen sind, und daß im Hohlraum (6) ein um dessen Mittelachse drehbares Abgriffsteil (9) gelagert ist, das die Leit- und/oder Weiderstandsbahnen (3ʹ, 4ʹ) kontaktiert.7. potentiometer,
produced by a method of one of the preceding claims,
characterized,
that the substrate forms the housing (5ʹ) of the potentiometer and encloses a cylindrical cavity (6), on the inner wall (7) of the conductive and / or resistance tracks (3ʹ, 4ʹ) are provided, and that in the cavity (6) around whose center axis has a rotatable tapping part (9) which contacts the guide and / or resistance tracks (3ʹ, 4ʹ).
dadurch gekennzeichnet,
daß die Leit- und/oder Widerstandsbahnen (3ʹ, 4ʹ) in Umfangsrichtung der Innenwand (7) verlaufen.8. Potentiometer according to claim 7,
characterized,
that the conductive and / or resistance tracks (3ʹ, 4ʹ) extend in the circumferential direction of the inner wall (7).
dadurch gekennzeichnet,
daß elektrische Anschlüsse (12) der Leit- und/oder Widerstandsbahnen (3ʹ, 4ʹ) mit in das das Gehäuse (5ʹ) bildende Substrat eingespritzt sind9. Potentiometer according to one of the preceding claims,
characterized,
that electrical connections (12) of the conductive and / or resistance tracks (3ʹ, 4ʹ) are also injected into the substrate (5ʹ) forming the substrate
dadurch gekennzeichnet,
daß am Gehäuse (5ʹ) Anformungen (8, 16) für das Abgriffsteil (9) durch entsprechende Gestaltung des Zwischenträgers (1) ausgebildet sind.10. Potentiometer according to one of the preceding claims,
characterized,
that on the housing (5ʹ) are formed (8, 16) for the tapping part (9) by appropriate design of the intermediate carrier (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3631058 | 1986-09-12 | ||
| DE19863631058 DE3631058A1 (en) | 1986-09-12 | 1986-09-12 | METHOD FOR PRODUCING GUIDANCE AND / OR RESISTANCE TRACKS ON A SUBSTRATE AND POTENTIOMETER PRODUCED BY THIS METHOD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0259709A2 true EP0259709A2 (en) | 1988-03-16 |
| EP0259709A3 EP0259709A3 (en) | 1989-12-06 |
Family
ID=6309437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87112459A Withdrawn EP0259709A3 (en) | 1986-09-12 | 1987-08-27 | Method for producing conductive and/or resistive paths on a substrate, and potentiometer manufactured thereby |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0259709A3 (en) |
| JP (1) | JPS6373603A (en) |
| DE (1) | DE3631058A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5781100A (en) * | 1994-03-16 | 1998-07-14 | Alps Electric Co., Ltd. | Resistor substrate containing carbon fibers and having a smooth surface |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3808583C1 (en) * | 1988-03-15 | 1989-05-11 | Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt, De |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2489072A1 (en) * | 1980-08-22 | 1982-02-26 | Ruf Kg Wilhelm | PCB resistance mfg. method - uses conductive layer formed on support and cursor, hardened and transferred |
| US4355293A (en) * | 1979-10-22 | 1982-10-19 | The Bendix Corporation | Electrical resistance apparatus having integral shorting protection |
| EP0129697A2 (en) * | 1983-06-22 | 1985-01-02 | Preh-Werke GmbH & Co. KG | Method of making printed circuit boards |
| EP0148601A2 (en) * | 1984-01-09 | 1985-07-17 | Stauffer Chemical Company | Transfer lamination of electrical circuit patterns |
| EP0157666A1 (en) * | 1984-02-28 | 1985-10-09 | Siemens Automotive S.A. | Rotating potentiometer, particularly for angular position measurement |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH295509A (en) * | 1950-07-13 | 1953-12-31 | Limited Voltohm Processes | A method of manufacturing an electrical resistance in metal. |
| US3240642A (en) * | 1960-01-18 | 1966-03-15 | Zenith Radio Corp | Method of printing an electrical component |
| GB1268756A (en) * | 1968-06-14 | 1972-03-29 | Plessey Co Ltd | Improvements in or relating to electrical or electronic components |
| GB1232350A (en) * | 1969-04-18 | 1971-05-19 | ||
| DE2115369A1 (en) * | 1971-03-30 | 1972-10-05 | Siemens Ag | Printed circuits with glass or ceramic platelets - printed with the conducting layer using a silicone rubber layered roller |
| JPS5235109B2 (en) * | 1972-02-23 | 1977-09-07 | ||
| CH598681A5 (en) * | 1976-10-08 | 1978-05-12 | Kif Parechoc Sa |
-
1986
- 1986-09-12 DE DE19863631058 patent/DE3631058A1/en not_active Withdrawn
-
1987
- 1987-08-27 EP EP87112459A patent/EP0259709A3/en not_active Withdrawn
- 1987-09-10 JP JP62225456A patent/JPS6373603A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4355293A (en) * | 1979-10-22 | 1982-10-19 | The Bendix Corporation | Electrical resistance apparatus having integral shorting protection |
| US4355293B1 (en) * | 1979-10-22 | 1985-09-03 | ||
| FR2489072A1 (en) * | 1980-08-22 | 1982-02-26 | Ruf Kg Wilhelm | PCB resistance mfg. method - uses conductive layer formed on support and cursor, hardened and transferred |
| EP0129697A2 (en) * | 1983-06-22 | 1985-01-02 | Preh-Werke GmbH & Co. KG | Method of making printed circuit boards |
| EP0148601A2 (en) * | 1984-01-09 | 1985-07-17 | Stauffer Chemical Company | Transfer lamination of electrical circuit patterns |
| EP0157666A1 (en) * | 1984-02-28 | 1985-10-09 | Siemens Automotive S.A. | Rotating potentiometer, particularly for angular position measurement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5781100A (en) * | 1994-03-16 | 1998-07-14 | Alps Electric Co., Ltd. | Resistor substrate containing carbon fibers and having a smooth surface |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0259709A3 (en) | 1989-12-06 |
| DE3631058A1 (en) | 1988-03-24 |
| JPS6373603A (en) | 1988-04-04 |
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