What is the working principle of flexible circuit boards on the keyboard?
Copper foil: basically divided into electrolytic copper and rolled copper two. Common thickness of the 1oz 1 / 2oz and 1/3 oz substrate film: the common thickness of 1mil and 1 / 2mil two.
Flexible circuit board is a polyimide or polyester film made of a substrate with a high degree of reliability, excellent flexible printed circuit board. Referred to as soft board or FPC, with a high wiring density, light weight, thin thickness characteristics.
Yes, is the upper and lower dots connected to the signal input chip, each connected points are different combinations.
Of course, is turned on, the voltage can not be changed, each key connected to the input chip, encoded by ASCII to the host (CPU), each key corresponds to a different ASCII code.
