Abstract
This paper reports a uniform array of microneedles and enabled electrotactile feeling. In our prior work, we successfully lowered the voltage that required to present tactile sensation by making needle-shape electrodes, penetrating through stratum corneum which has high impedance. However, the non-uniformity resulted in localized pain and/or distributed stimulation. To solve the problem, we proposed the new fabrication process to make micro-needle electrodes. We successfully achieved to uniformize the needles, solved localized pain and/or distributed stimulation in two dimentional tactile sensation. Also, using large area micro-needle electrode array, we successfully present three different patterns of signal to the subjects, made them identify the signals. This microfabrication-enabling technique will offer a new medium for information communication technologies.
