Abstract: The existing flexible touch devices are confined to low resolution and complex structures. For solving these problems, a flexible touch device is developed based on capacitive principle and made of a single layer non-woven carbon film. Within a working area of 128mm×72mm in the touch pad with L-shape electrodes, of which the length of each side is 72mm, the test results show that the linearity of the touch device in X and Y directions is ?1.40% and ?2.39%, respectively, and the resolution reaches as high as 251dpi×243dpi. To discuss more on controlling accuracy of the device, the deviation rate is defined. The test results shows that, the control positions whose deviation rate is greater than 6% are located near the edges of the work area. In addition, to increase the side length of L-shape electrodes has positive but minor effects to improve linearity. Therefore, it would be better to apply point electrodes to the touch device for flexibility and portability.

Key words: flexile touch control device, capacitive, non-woven carbon film, linearity, deviation rate, electrode