Patent ID: 7644615

Claim:
A humidity sensor comprising: a sensor chip including a capacitive humidity sensor element and a connection electrode, wherein the capacitive humidity sensor element includes a humidity sensitive film having relative permittivity changeable in accordance with humidity, and wherein the connection electrode is electrically connected to the humidity sensor element; a lead plate electrically connected to the connection electrode; and a mold for covering a connection portion between the connection electrode and the lead plate, wherein the mold is disposed on the sensor chip and includes a groove, the humidity sensitive film is disposed in the groove of the mold, the humidity sensitive film has a height in the groove, the height equal to or lower than a surface of the mold, the height of the humidity sensitive film in the groove is homogeneous, and the height of the humidity sensitive film is lower than the surface of the mold, the mold further includes a through hole, which penetrates from an outer surface of the mold to a side wall of the groove, and the through hole in the mold is disposed between the surface of the mold and a surface of the humidity sensitive film in the groove.