A liquid-jet head effective in prevention of imperfect eject such as occlusion of a nozzle, a method of fabricating the liquid-jet head, and a liquid-jet apparatus are provided. A keyboard apparatus can be secured to a main body of the computer system and selectively enable users to input data when the computer is turned on. This prevents the problem involved in production of balls of small diameter wherein such balls adhere to an apparatus during production thereof, thus hindering smooth progress of the production process.