Patent ID: 8623449

Claim:
A method for producing a laminated base material, comprising: a step of applying a liquid composition containing an aprotic polar solvent and a liquid crystal polyester to a substrate; and a step of forming a covering material by removing the aprotic polar solvent in the liquid composition; wherein the substrate comprises an insulating layer and a conductor laminated on the insulating layer, the conductor forms a circuit pattern on the insulating layer, the liquid composition is applied to the substrate in a manner such that the liquid composition covers the conductor in the applying step, and the liquid crystal polyester comprises 30 mol % to 50 mol % of the structural unit represented by formula (1), 25 mol % to 35 mol % of the structural unit represented by formula (2), and 25 mol % to 35 mol % of the structural unit represented by formula (3), relative to a total content of all structural units: —O—Ar 1 —CO— (1) —CO—Ar 2 —CO— (2) —X—Ar 3 —Y— (3) wherein Ar 1 represents a phenylene group or a naphthalene group, Ar 2 represents a phenylene group, a naphthalene group, or a group represented by formula (4), Ar 3 represents a phenylene group or a group represented by formula (4), and X represents O and Y represents NH; and hydrogen atoms belonging to the group represented by Ar 1 , Ar 2 , or Ar 3 may each be independently substituted with a halogen atom, an alkyl group, or an aryl group; —Ar 11 —X—Ar 12 - (4) wherein Ar 11 and Ar 12 each independently represent a phenylene group or a naphthalene group and Z represents O, CO, or SO 2 .