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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 |
|
|
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steel |
b |
|
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|
plastic |
c |
c |
|
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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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