Composite transistor

A composite transistor comprising:

• a first transistor including a control electrode, a first active region, a first A extending part, and a first B extending part;
• and
• a second transistor including a control electrode, a second active region, a second A extending part, and a second B extending part,
• wherein the first active region, the second active region, and the control electrode overlap with one another in an overlapping region,
• each of the transistors has a first electrode, a second electrode, and a third electrode,
• an insulation layer is provided between the control electrode and one of the first active region and the second active region both adjacent to the control electrode,
• each of the two transistors has the first A extending part that extends from one end of the first active region, the first B extending part that extends from other end of the first active region, the second A extending part that extends from one end of the second active region, and the second B extending part that extends from other end of the second active region,
• the first electrode connects to the first A extending part,
• the second electrode connects to the second A extending part, and
• the third electrode connects to the first B extending part and the second B extending part.