Transducer

In an electromechanical transducer unit;

• a substrate support body of semiconductive material of a first type and having two pads separated by an intermediate reduced neck,
• a lineal resistor composed of semiconductive material of a second type in the reduced neck of the substrate support body and extending from one of said pads to the other, one of said types being N-type, the other being P-type,
• two metallic films on the substrate support body, each film contacting one of the ends of the lineal resistor respectively, the electrical resistance of the resistor varying with the relative displacement of the pads of the substrate support body, and
• two relatively movable members secured to the respective pads for displacing one of the pads relative to the other.

In an electromechanical transducer:

• a substrate support body of semiconductor material having a first type of conductivity and having two pads separated by an intermediate reduced neck,
• a "U"-shaped line of semiconductive material of a second type of conductivity in one side of the substrate support body, one end of each leg of the "U" terminating on the same pad, the cross-member of the "U" being positioned on the other of said pads,
• two metallic films on the said same pad, each respectively contacting the two ends of said legs on said same pad and adapted to be contacted by terminals, the electrical resistance of the resistor element formed by the terminals, the metallic films and the "U"-shaped line varying with the relative displacement of the pads of the substrate support body about the neck, and
• two relatively movable members secured to the respective pads for displacing one of the pads relative to the other.