Which metal snap domes for cellphone?
There are normal circle and oblong shape metal domes. They are also normally made into the EMI dome array to assemble on the phone. Early, cellphone metal domes are two kinds, with or with one dimple, but now with the technology developing, there are also with three dimples, four dimples, five dimples happened in 2009. More dimples, better click feeling, but the life is a little less than before.
Circle metal dome: 3mm, 3.5mm, 4.5mm, 5mm are most used; Oblong metal dome: 5.0mm*3.8mm, 4.0*3.0 are most used.