| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable information terminal which is thin in thickness, high in reliable against external force in portable use and high in visibility even at a dim place. SOLUTION: The portable information terminal which is very thin in thickness, and high in visibility even at the dim place is constituted by providing it with at least an organic EL display, a plurality of IC chips, an antenna coil for communication, an inputting key switch, a sheet battery, etc. A transparent substrate being a base material forming the organic EL display is mainly made of polymer and the IC chip is made thin in thickness to obtain the portable information terminal which is not broken easily due to external force such as curving in portable use. The transparent substrate, a supporting substrate being the core of the terminal information terminal or a multilayer wiring board are constituted of waterproof material to seal the organic EL display with them. Thus, the display is prevented from being deteriorated due to moisture absorption to enhance its reliability. |
