Patent ID: 7279434

Claim:
A material for forming a low-dielectric-constant film, containing in a stereoisomer of a cyclic siloxane substance represented by general formula, (SiHR 1 O) L (SiHR 2 O) m (SiHR 3 O) n (wherein R 1 , R 2 and R 3 may be identical or not identical and individually denote C a H 2a+1 , C b H 2b+1 O, CF 3 (CF 2 ) c (CH 2 ) d , C b H 2c−1 , C 6 H 5 or a halogen atom, a denotes an integer of 1 to 3, b an integer of 1 to 3, c an integer of 0 to 10, d an integer of 0 to 4, e an integer of 2 to 4, L an integer of 0 to 8, m an integer of 0 to 8, n an integer of 0 to 8, and a relation of 3≦L+m+n≦8 is satisfied), not less than 120/2 L+m+n−1 % and not more than 100% of a stereoisomer having all (L+m+n) number of hydrogen atoms forming an Si—H bond fall on a same side relative to an Si—O ring plane.