Patent ID: 7736527

Claim:
A method of forming a capacitor, the method comprising: forming a mold layer pattern on a substrate having a conductive structure, the mold layer pattern having an opening exposing the conductive structure; forming a conductive layer on a bottom and sidewalls of the opening and on the mold layer pattern; forming a buffer layer pattern on the conductive layer formed in the opening, the buffer layer pattern including a siloxane polymer represented by the following Chemical Formula 1, wherein each R independently represents an alkyl group having 1 to 5 carbon atoms, and n represents a natural number; selectively removing the conductive layer on the mold layer pattern to form a lower electrode; removing the mold layer pattern and the buffer layer pattern using an etching solution including hydrofluoric acid; forming a dielectric layer on the substrate having the lower electrode; and forming an upper electrode on the dielectric layer