Patent ID: 8310017

Claim:
A pressure sensor in which an electrode layer is formed on a surface of a first substrate; a resistor layer is formed, facing said electrode layer, on a second substrate which is opposed to said first substrate through a spacer; as a load applied to at least one of said first substrate and second substrate changes, an area of contact between the resistor layer and the electrode layer changes; and the load applied to said substrate is sensed by detecting a resistance change according to the change of said area of contact, characterized in that an uneven layer is formed of a resin containing non-conductive particles and having insulation properties, on a surface of said second substrate; and the resistor layer containing at least carbon powder and having a certain film thickness is formed on a surface of said uneven layer, wherein a sum of a film thickness of the uneven layer between said non-conductive particles and the film thickness of the resistor layer is smaller than a particle diameter of the non-conductive particles included in the uneven layer, and at least the resistor layer is formed on said non-conductive particles and between said non-conductive particles.