Patent ID: 9658121
Date: 2017-05-23
CPC Classifications: G01L,H01L

Claim:
1. A load sensor using a vertical transistor, comprising: a substrate including a surface that is an insulator; a rib arranged on the substrate, the rib including a surface including a side surface and a top surface, the surface that is an insulator, the rib being made of a material different from a material of the substrate and the rib having a Young's modulus smaller than that of the substrate; a transistor including a gate electrode that is arranged on the side surface of the rib, a gate insulating film, and a semiconductor film; a bottom electrode layer arranged on a bottom surface of a recession and being in contact with the semiconductor film, the recession that is a part of the substrate where the rib is arranged; and a top electrode layer arranged on a top surface of a protrusion and being in contact with the semiconductor film, the protrusion that is a part of the substrate where the rib is not arranged, wherein when a gate voltage is applied to the gate electrode, a channel area is generated in the semiconductor film, and a current flows between the bottom electrode layer and the top electrode layer, and when a load is applied to the protrusion, a length of the semiconductor film is changed in a direction parallel to a height of the rib according to a deformation of the rib, and the transistor executes a load measurement based on a change of the current.