In Rubber Keypad Design, the Right Contact Type is Essential

If you are designing a product that will use theink can be screened onto virtually any sized
helpful and versatile rubber keypad, it is importantcontact switch area. The contact resistance for
to not only pick a useful, functional, and attractivethis type of contact is low at first, but as the
look, it is also essential to select the right type ofmicrons-thin ink wears away the resistance
contact to go under the keypad. Here's abecomes increasingly higher. Because of this
snapshot look at the types that are available: thefactor, conductive ink does not enjoy the same
ultimate success of your product will depend onlongevity as the carbon pill. It may be the best
your choosing the perfect one.electrical solution for your particular application,
The Carbon Pillhowever, and in this case it would be an excellent
The most commonly used contact, the carbon pillchoice.
is - as its name implies - circular shaped andGRSP
comes in sizes ranging from 2.0 to 8.0 mm inCombining the best of both the above types, the
diameter. They are fairly slender in terms ofGRSP contact provides both carbon pill-type
thickness, measuring less than .5 mm. The reasoncontact resistance as well as the flexibility of
why the carbon pill is so popular is because itconductive ink technologies. Unlike ink that has
enjoys a long life. This longevity is due in largebeen silk screened, special conductive ink for
measure to the fact that is has low contactGRSP contacts is applied thicker which gives the
resistance and quite simply doesn't wear out ascontact a longer life.
fast as others as a result.When it comes to creating the ideal keypad that
Silk Screened (Conductive Ink)is completely user-friendly the right type of
This contact type is incredibly versatile since thecontact just might make all the difference.