Patent ID: 7135706
Filing Date: 2006-11-14
Classification: H01L

Abstract:
1. An image sensor, which converts an incident electromagnetic wave into electric charge by a conversion section, and which reads out as a signal, the electric charge as collected in a pixel electrode, via a switching element, wherein said switching element is a thin film transistor wherein its drain electrode is connected to said pixel electrode, and its source electrode is connected to a signal line; said image sensor, comprising: an electrically conductive film which is extended from the pixel electrode to a layer above said switching element; and a dielectric film made of an inorganic film, said dielectric film being formed at least on a channel region of said switching element; and an interlayer insulating film made of an organic film, formed on an upper surface of said dielectric film and at a lower surface of said electrically conductive film and said pixel electrode, wherein a total amount of electrostatic capacitance of said interlayer insulating film and said dielectric film is selected so as to prevent said switching element from being destroyed against high voltage, and to prevent a leak current in normal operations; and a thickness of said dielectric film and a thickness of said interlayer insulating film are selected respectively to satisfy said total amount of electrostatic capacitance of said interlayer insulating film and said dielectric film.