Patent ID: 9318346
Filing Date: 2016-04-19
CPC Classification: C09G,C09K,H01L

Claim Text:
1. A polishing method comprising: a polishing step of removing at least a part of a barrier conductive film and a part of an interlayer dielectric by supplying a CMP polishing liquid, wherein the CMP polishing liquid comprises a medium and silica particles as an abrasive grain dispersed into the medium, wherein: (A2) the silica particles have a silanol group density of less than 5.0/nm (B2) a biaxial average primary particle diameter when arbitrary 20 silica particles are selected from an image obtained by scanning electron microscope observation is 60 nm or less; and (C2) an association degree of the silica particles is 1.20 or less or from 1.40 to 1.80.