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Construct a Switch

  • The five basic layers can be set up in a matrix for quick identification

  • Each construction can be labeled with five letters.

  • The position of each letter represents one of the layers.

    •   Code Example 1 Example 2 Example 3
    Graphic Layer        
    polyester a a a  
    polycarbonate b      
    elastomer c      
    no graphic layer x     x
    Membrane Layer        
    polyester, opaque conductor a a    
    polyester, transparent conductor b     b
    metal dome, metal conductor c      
    elastomer, conductive pill d      
    poly-graphic layer, opaque conductor e   e  
    Tactile Layer        
    metal dome a      
    poly dome b b    
    graphic dome c      
    packaged membrane d      
    elastomer e      
    non-tactile x   x x
    Static Layer        
    polyester, opaque conductor a a a  
    polyester, transparent conductor b      
    polyimide, copper conductor c      
    PCB, copper conductor d      
    packaged membrane, internal conductor e      
    glass, transparent conductor f     f
    Rigid Layer        
    aluminum a      
    steel b      
    plastic c c    
    glass d     d
    no rigid backer x   x  


    Example 1:

    In this example the poly dome is formed in the membrane layer.

    " a a b a c " is a tactile poly dome design where the dome is formed in the membrane layer.

    a polyester graphic layer
    a polyester, opaque conductor membrane layer
    b poly dome tactile layer
    a polyester, opaque conductor static layer
    c plastic rigid layer


    Example 2

    This is a non-tactile membrane and shipped to the customer w/o a rigid backer.

    " a e x a x " is non-tactile and has very few layers because the graphic (PET) layer is also the membrane layer. Note an "x" is used when a layer is missing. Again, note that the membrane & static layers can never be missing.

    a polyester graphic layer
    e graphic (PET) layer, opaque conductor membrane layer
    x non-tactile no tactile layer
    a polyester, opaque conductor static layer
    x none no rigid layer


    Example 3

    Another non-tactile membrane but transparent using ITO coated glass as the static / rigid layers.

    " x b x f d " is also a non-tactile design except it is a transparent membrane (touch screen) where the glass backer is also the static layer because the transparent conductor is integral with the glass.

    x none no graphic layer
    e polyester, transparent conductor membrane layer
    x non-tactile no tactile layer
    f glass, transparent conductor static layer
    d glass rigid layer

    Membrane Switch Definition | Options | Specifications

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