Editing Keyboard switch by Hiroshi Hasegawa (section)

==Detailed description==

[[#Images|Figure 3]] shows electrodes (32) (36) and a dielectric (34), where '''''d''''' is the distance between electrodes (32) (36) and '''''S''''' is the area that electrodes (32) (36) face one another. Now let '''&#1013;''' be the constant of the dielectric, the capacitance '''''C''''' that is obtained as a result, depends entirely on the facing portions of the area of electrodes (32) (36), since it varies substantially after depressing the button (24) as shown in [[#Images|Figure 4]].

''C'' = &#1013; ( ''S'' / ''d'' )

Based on that, the operational values for the switch must be adjusted accordingly. So the switch may be turned on with half full depth of depression of the button let '''C''' have an adjusted value of 12 (pF) , and the capacitance value for the off position is set to 8 (pF) which is 4 (pF) lower than the value for the operation when the switch is turned on. <ref name=topre/>