▎ 摘　　要

NOVELTY - The element has a semiconductor layer (4) arranged between the two electrodes (2, 3). The semiconductor layer contains 1 or more types chosen from a carbon nanotube and a graphene. The predetermined relationship between channel length (Lc) and channel width (Wc) of the semiconductor element is satisfied. The carbon nanotube is the carbon nanotube composite to which the polymer adhered in at least one unit of the surface. The polymer is a conjugated system polymer. The semiconductor element contain the polysiloxane layer on the board. USE - Semiconductor element of sensor (claimed). ADVANTAGE - The favorable switching characteristic is acquired. The semiconductor element is excellent in the switching characteristic. The high detection sensitivity of sensor is achieved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a manufacturing method of the semiconductor element. DESCRIPTION OF DRAWING(S) - The drawing shows a model top view of the semiconductor element. Board (1) First electrode (2) Second electrode (3) Semiconductor layer (4)