| 摘要 |
PROBLEM TO BE SOLVED: To obtain a method for forming a double-gate MOSFET structure in which the thickness of an oxide can be properly controlled and the upper and lower gate positions can be matched, and a structure for this. SOLUTION: This method for manufacturing a double-gate MOSFET structure comprises a step of forming a laminated structure having a monocrystal silicon channel layer 5 and an insulating oxide and nitride layer, a step of forming an opening in the laminated structure, a step for forming a source and drain region 9 in the opening, a step of removing the laminated structure part by part which is not covered with a mask, a step of removing the mask and the insulating oxide and nitride layer, and for leaving the channel layer 5 suspended from the source/drain region, a step of forming an oxide layer 11, and for covering the source/drain region and the channel layer, and a step for forming a double-gate conductor 12 on the oxide layer 11, so that a first conductor and a second conductor can be respectively included at the first side and second side of the channel layer 5.
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