Patent ID: 7358126

Claim:
A method of forming a dual damascene structure, the method comprising: forming a preliminary dual damascene structure comprising an insulation member and preliminary single crystal members, the insulation member formed on a single crystal seed layer, the insulation member comprising a plurality of first openings and a second opening, the first openings partially exposing the single crystal seed layer, the second opening being communicated with the first openings, the second opening being substantially wider than the first openings, the preliminary single crystal members making contact with the single crystal seed layer, the preliminary single crystal members substantially filling up the first openings; forming a filling member on a side face of the second opening, the filling member partially filling up the second opening; forming single crystal members by causing the preliminary single crystal members to grow epitaxially, the single crystal members making contact with the filling member, the single crystal members continuously filling up the first openings and a part of the second opening; and forming a connection member between the single crystal members, the connection member having an amorphous state; and changing the state of the connection member from an amorphous state to a single crystal state to thereby form a single crystal connection member connected between the single crystal members.