| 摘要 |
A capacitive touch screen (10) for providing a user interface at a computer terminal or control panel. The capacitive touch screen (10) is provided on the back side thereof with a thin-film conductive metal layer (20) which serves as a grounded capacitor plate as well as an RFI shield. The other capacitor plate of the capacitive touch screen is also provided by a thin-film conductive metal layer (22) which is separated from the first thin-film conductive metal layer (20) by a dielectric layer (24a, 24b). However, the second thin-film indium tin oxide layer (22) is patterned by chemical or laser etching to provide discrete touch-sensitive capacitive areas (12a-12e) which can be discretely detected when a user touches the user interface side of the screen. The second thin-film conductive layer (22) which is patterned is located completely internally to the screen since there is a second dielectric layer (26) which is formed over the second thin-film metal layer (22). |
