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Membrane Switches Terms
– The degree to which a
membrane switch is able to withstand surface wear.
– This is the action of working a switch apparatus.
– The pressure necessary for collapsing the walls
of the dome on a polyester, rubber or metal keypad.
– The molecular attraction of one material to another.
The strength of the bond is determined by the surface energy in each
material.
– An adhesive applied to the back of a membrane
switch for mounting purposes.
– The minimum voltage at which the insulation
between two conductors is destroyed.
– The type of ink that consists of prepared
suspensions of carbon black and is frequently printed over silver circuitry
to diminish the potential of migration of silver. These are used for
lessening costs when the conductivity of a metal base system is not necessary.
– A material’s ability to allow electrons to
flow.
– A conductor intersection insulated by dielectric material.
– A cosmetic feature of a graphic overlay in which a
button is only visible when backlit.
– An insulating or non-conducting medium.
– Used for printing
protective patterns on conductive printing to isolate selected regions
from electrical contact with other conductors. This is used for cross-overs
and tail insulation on membrane switches.
– An adhesive
layer made to hold metal domes in the keyswitch.
– A slender device that
illuminates large areas, typically used in LCD membrane switch backlighting
and control panels.
– Procedure of integrating a surface mount LED into
a membrane switch assembly.
– A way to supply a raised characteristic to accentuate
key surfaces through mechanical and thermoforming of graphical features.
This also permits an embedding of a surface mount of an LED inside the
switch.
– The extent of shininess of a substrate, commonly
identified in percentages.
–Control keypads
that use graphics for button functions for navigation on machines or process
operations. Typical graphics include arrows or symbols indicative of a
machine process or operation.
– Switch openings connected to one another to
seal the switch from moisture and other contaminants.
– A measure of the distance from the highest point of
a key to the base of the keypad.
– Embedded in membrane switch layers
to illuminate the button.
– A material’s ability to resist the
absorption of water from the air or during complete submersion.
– The decorative front layer of a membrane switch or control
panel.
– The travel that is done by the rubber keyboard or
metal dome after making contact with the circuit.
– Creating a raised surface in the graphic overlay
over the key area.
– The schematic that describes the circuit output requirements
for membrane switches.
– Adhesive materials that bond after pressure
without needing heat or solvents.
– Produces a raised ridge circling the key area.
– Printing procedure that uses a stretch of mesh
over a frame, permitting the use of a stencil to discriminately allow
ink through. This is typically used for creating graphic overlays and
membrane circuits.
– Finely-milled particles of silver suspended in various
resin systems that produce conductive patterns on rigid and flexible
substrates. This is a typical conductor material for membrane switches.
– A membrane switch adhesive layer that separates circuit
layers to supply keyswitch openings, permitting the contact of conductors
when depressed.
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