Patent ID: 8592317

Claim:
A polishing solution for CMP comprising abrasive grains, a first additive a second additive and water, wherein the first additive is at least 1,2-benzoisothiazole-3(2H)-one or 2-aminothiazole; and the second additive satisfying the following conditions i) to v): i) having in a molecule at least cyclic structure including at least one carbon-carbon double bond, the “carbon-carbon double bond” optionally including carbon-carbon bonds forming a resonance structure; ii) having at least one and not more than four —OH structures in a molecule, the —OH structures optionally including —OH structures in —COOH groups; iii) having not more than one —COOH group in a molecule; iv) having either or both the following first structure and/or second structure in a molecule; first structure: a structure comprising a carbon atom C 1 and a carbon atom C 2 adjacent to the carbon atom C 1 , an —OH group being bonded to the carbon atom C 1 , and at least one substituent selected from the group consisting of —OX, ═O, —NX, —NX(C 3 ) and —CH═N—OH groups being bonded to the carbon atom C 2 , where X represents hydrogen atom or a carbon atom and C 3 represents a carbon atom bonded to the nitrogen atom N in the —NX(C 3 ) group, wherein bonding forms and bonding atoms of remaining unshown bonds of the carbon atoms C 1 , C 2 and C 3 are optional, and when X is a carbon atom, bonding forms and bonding atoms of remaining unshown bonds of X are optional; second structure: a structure comprising a carbon atom C 1 and a carbon atom C 2 adjacent to the carbon atom C 1 , a —CH═N—OH group being bonded to the carbon atom C 1 and a —CH═N—OH group being bonded to the carbon atom C 2 , wherein bonding forms and bonding atoms of remaining unshown bonds of the carbon atoms C 1 and C 2 are optional; v) either or both the carbon atom C 1 and/or carbon atom C 2 according to condition iv) forms part of the cyclic structure according to condition i), or is bonded to the cyclic structure according to condition i); wherein the first structure according to condition iv) is selected from among structures represented by the following formulas a), b), d)-l): in the formulas a), b), d)-l), the bond represented by a pair of solid line and dotted line indicates a bond forming a resonance structure, bonding forms and bonding atoms of remaining unshown bonds of the carbon atoms C 1 , C 2 and C 3 are optional, and when X is a carbon atom, bonding forms and bonding atoms of remaining unshown bonds of X are optional.