| 摘要 |
<p>A finger print reader comprises a matrix of electronic switches selectively controlled by individually associated electrodes. A thin film having a conductive surface is suspended over the electrodes to apply a control potential to said electrode in response to the pressure applied by a ridge in the pattern of a finger print. Shift registers scan the electrodes to identify the address of a finger print ridge which is turning on the associated electronic switch. The entire unit is built on a semiconductor substrate. Thus, the amount of wiring is greatly reduced. The reader is a unified device made with the precision of an integrated circuit.</p> |
