EP0212252A2 - Procédé de fabrication d'un interrupteur à membrane et interrupteur à membrane - Google Patents

Procédé de fabrication d'un interrupteur à membrane et interrupteur à membrane Download PDF

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Publication number
EP0212252A2
EP0212252A2 EP86109715A EP86109715A EP0212252A2 EP 0212252 A2 EP0212252 A2 EP 0212252A2 EP 86109715 A EP86109715 A EP 86109715A EP 86109715 A EP86109715 A EP 86109715A EP 0212252 A2 EP0212252 A2 EP 0212252A2
Authority
EP
European Patent Office
Prior art keywords
printed
carrier
spacer
film
cover film
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.)
Withdrawn
Application number
EP86109715A
Other languages
German (de)
English (en)
Other versions
EP0212252A3 (fr
Inventor
Winfried Hormes
Günter Dipl.-Ing. Tessendorf
Eberhard Lendle
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.)
Schoeller and Co Elektrotecnische Fabrik GmbH and Co
Original Assignee
Schoeller and Co Elektrotecnische Fabrik GmbH and Co
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 Schoeller and Co Elektrotecnische Fabrik GmbH and Co filed Critical Schoeller and Co Elektrotecnische Fabrik GmbH and Co
Publication of EP0212252A2 publication Critical patent/EP0212252A2/fr
Publication of EP0212252A3 publication Critical patent/EP0212252A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/703—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by spacers between contact carrying layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/02—UV or light sensitive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/006—Individual areas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H01H2227/01—Adhesive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/018—Printed contacts; Metal foil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/024—Spacer elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/028—Key stroke
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/002—Screen printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/012—Vacuum deposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/024—Packing between substrate and membrane
    • H01H2229/028—Adhesive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/038—Folding of flexible printed circuit

Definitions

  • the invention relates to a method for producing a membrane switch, in which at least one spacer layer of insulating varnish is printed on a carrier on the conductor, whereby a distance between the conductors of the carrier and conductors of a cover film is created and switching chambers are left in which the conductors face each other .
  • the invention further relates to a membrane key switch.
  • the carrier and the cover film are made of different materials in DE-OS 33 16 616.
  • the spacing layers In order to achieve a desired distance, the spacing layers must either be correspondingly thick or correspondingly numerous, so that a correspondingly large number of printing processes are necessary for larger distances.
  • the film switch according to DE-PS 29 02 769 consists of a film folded around an intermediate layer and glued to this.
  • the object of the invention is to propose a method of the type mentioned in the introduction, in which the number of printing processes is reduced and secure fastening of the cover film is achieved.
  • Another object of the invention is to propose a corresponding membrane key switch.
  • the above object is achieved in a method of the type mentioned at the outset in that the spacer layer or the spacer layers are simultaneously printed on the conductor track side in one or more successive printing steps on the carrier and the cover film as parts of a single film provided with conductor tracks then an adhesive layer in the top spacer layer above the carrier film part and / or the cover film part Surrounding the switching chambers is applied and that then one film part is folded onto the other film part, so that the adhesive layer connects the mutually facing spacer layers.
  • the adhesive layer is also printed on. It is sufficient if it is printed over the carrier film part or the cover film part. It does not have to cover the entire spacer layer, but can also extend in a pattern between the interrupters, the area of which is smaller than that of the spacer layers.
  • the adhesive layer is preferably applied in such a way that it is spaced apart from the switching chambers. It is then also inaccuracies when printing the adhesive layer avoided that glue gets into the interrupters.
  • a membrane key switch according to the invention is characterized in that two foils of the same thickness, printed with conductor tracks and spacer layers of the same thickness, are glued to one another at their spacer layers.
  • the conductor tracks 2 and 4 can be applied by conventional methods. In the case of vapor deposition, they have a thickness of approximately 0.5 ⁇ m to 2 ⁇ m. When using conductive silver substrates that can be screen-printed, a thickness of 10 ⁇ m to 15 ⁇ m is achieved.
  • a first spacer layer 6 made of insulating varnish is printed on the plastic film 1 and over the conductor tracks 2 and 4 in a single printing process, in particular in screen printing.
  • the spacer layer 6 leaves ends of the conductor tracks 2 and 4 free. These are located in cylindrical subchambers 7 and 8 which are free of spacer layers.
  • the spacer layer 6 also leaves open a folding area 9 of the film 1.
  • a second spacer layer 10 made of the same insulating varnish is then printed on the spacer layer 6. This leaves the same areas 7, 8, 9 free as the spacer layer 6.
  • Each of the spacer layers 6 and 10 has a thickness between 20 ⁇ m and 40 ⁇ m.
  • the thickness of the adhesive layer 11 is between 20 ⁇ m and 40 ⁇ m.
  • the adhesive layer 11 also leaves the partial chamber 7 free. It preferably does not extend to the edge of the partial chamber 7 in order to prevent adhesive from penetrating into the partial chamber 7 if there are tolerances in the printing process.
  • an adhesive which does not harden during the intermediate storage and can only be activated after the intermediate storage.
  • adhesives that can be activated by UV radiation are known.
  • the cover film area 5 is folded over the line 12 perpendicular to the plane of the drawing in the direction of the arrow P.
  • the region 13 of the spacer layer 10 lying above the cover film region 5 comes into contact with the adhesive layer 11, so that the region 13 of the spacer layer 10 is connected by means of the adhesive layer 11 to the region 14 of the spacer layer 10 lying above the carrier film region 3.
  • the subchambers 7 and 8 are aligned and form the switching chambers 15, of which only one is shown in FIG. 2 and in which the ends of the conductor tracks 2 and 4 face each other (cf. FIG. 2).
  • distances between 110 pm and 190 pm can be achieved. If larger distances between the carrier film region 3 and the cover film region 5 are desired, more than two spacer layers can also be provided. It is always favorable that the thickness of each printed spacer layer has a double effect on the distance between the carrier film region 3 and the cover film region 5.

Landscapes

  • Push-Button Switches (AREA)
EP86109715A 1985-08-01 1986-07-16 Procédé de fabrication d'un interrupteur à membrane et interrupteur à membrane Withdrawn EP0212252A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3527561 1985-08-01
DE19853527561 DE3527561A1 (de) 1985-08-01 1985-08-01 Herstellungsverfahren fuer einen folientastschalter und folientastschalter

Publications (2)

Publication Number Publication Date
EP0212252A2 true EP0212252A2 (fr) 1987-03-04
EP0212252A3 EP0212252A3 (fr) 1989-08-30

Family

ID=6277360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109715A Withdrawn EP0212252A3 (fr) 1985-08-01 1986-07-16 Procédé de fabrication d'un interrupteur à membrane et interrupteur à membrane

Country Status (3)

Country Link
EP (1) EP0212252A3 (fr)
JP (1) JPS6235418A (fr)
DE (1) DE3527561A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013143708A3 (fr) * 2012-03-30 2013-12-05 Hochschule für angewandte Wissenschaften München Éléments de commutation à pistes conductrices chevauchantes et procédé de réalisation d'une configuration de circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6617536B2 (en) * 2000-11-29 2003-09-09 Yazaki Corporation Dome switch
DE10339052A1 (de) * 2003-08-25 2005-03-24 Giesecke & Devrient Gmbh Verfahren zur Herstellung einer Anordnung mit wenigstens einem elekrischen Schaltelement
DE102012005964A1 (de) * 2012-03-23 2013-09-26 Johnson Electric Germany GmbH & Co. KG Schalteranordnung für elektrische Ströme, umfassend zumindest zwei kurzzuschließende Kontakte

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028509A (en) * 1975-08-29 1977-06-07 Hughes Aircraft Company Simplified tabulator keyboard assembly for use in watch/calculator having transparent foldable flexible printed circuit board with contacts and actuator indicia
JPS52101493A (en) * 1976-02-20 1977-08-25 Alps Electric Co Ltd Fixed structure of terminal and method of fixing thereof
US4228330A (en) * 1978-07-10 1980-10-14 Litton Systems, Inc. Touch panel mechanism
DE2902769C2 (de) * 1979-01-25 1982-12-09 Rudolf Schadow Gmbh, 1000 Berlin Drucktastenschalter
US4365408A (en) * 1980-07-24 1982-12-28 Re-Al, Inc. Method of making membrane contact switch
US4382165A (en) * 1980-09-22 1983-05-03 Rogers Corporation Membrane keyboard and method of formation thereof
US4360716A (en) * 1980-10-01 1982-11-23 Texas Instruments Incorporated Area actuated switch array
DE8132645U1 (de) * 1981-11-07 1982-04-08 Felten & Guilleaume Carlswerk Ag, 5000 Koeln Direktschaltende Flachtastatur mit Rückmeldung durch Federwerkstoff
DE3309843A1 (de) * 1983-03-18 1984-09-20 Siemens Ag Tastschaltvorrichtung
DE8313473U1 (de) * 1983-05-06 1986-10-02 Wilhelm Ruf Kg, 8000 Muenchen Tastenfeld

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013143708A3 (fr) * 2012-03-30 2013-12-05 Hochschule für angewandte Wissenschaften München Éléments de commutation à pistes conductrices chevauchantes et procédé de réalisation d'une configuration de circuit

Also Published As

Publication number Publication date
JPS6235418A (ja) 1987-02-16
EP0212252A3 (fr) 1989-08-30
DE3527561A1 (de) 1987-02-05

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Inventor name: TESSENDORF, GUENTER, DIPL.-ING.

Inventor name: HORMES, WINFRIED

Inventor name: LENDLE, EBERHARD