Manufacturing method of semiconductor device

A manufacturing method of a semiconductor device comprising the steps of:

• stacking a first conductor and a first insulator over a substrate;
• forming a photoresist film corresponding to a first electrode over the stacked film;
• processing the stacked film of the first conductor and the first insulator to the stacked film of the first electrode and the first insulator by using the processed photoresist film;
• forming a second insulator over a pair of sidewalls of the first electrode;
• forming a second conductor for the second and third electrodes by coating over the sides of the second insulator formed over the pair of sidewalls, and over the stacked film of the first electrode and the first insulator;
• forming the second and third electrodes by removing the photoresist film over the first insulator and removing the second conductor for the second and third electrodes over the first insulator;
• and
• forming a semiconductor film which touches the second and third electrodes and covers the first insulator by coating a semiconductor material.