Patent ID: 7078917
Filing Date: 2006-07-18
Classification: G06K

Abstract:
1. An electrostatic capacitance detection device for reading surface contours of an object by detecting an electrostatic capacitance, which changes according to a distance with the object, comprising: M individual power supply lines and N individual output lines, arranged in a matrix of M rows×N columns, and electrostatic capacitance detection elements provided on crossing points of the individual power supply lines and the individual output lines, each of the electrostatic capacitance detection elements being formed of a signal detection element and a signal amplification element, the signal detection element being formed of a capacitance detecting electrode, a capacitance detecting dielectric layer and a reference capacitor, the reference capacitor being formed of a reference capacitor first electrode, a reference capacitor dielectric layer and a reference capacitor second electrode, and the signal amplification element being formed of a MIS type thin film semiconductor device for signal amplification, including a gate electrode, a gate insulating layer and a semiconductor layer, using an area of the reference capacitor electrode of S where ∈ where ∈