Patent ID: 8168525

Claim:
A method of mounting an electronic part, comprising the steps of: preparing an electronic part mounting board, the mounting board including an insulating substrate, a pad formed on the insulating substrate, a bump formed on the pad, and a film having heat resistance and electrical insulating properties and formed on the insulating substrate except the pad and the bump, the preparing step including: forming the film on the insulating substrate except the pad on the insulating substrate, the forming the film including: applying a polyimide to the insulating substrate and curing the polyimide; and removing the cured polyimide by etching at a portion thereof positionally corresponding to the pad; forming the bump lower than the film on the pad after forming the film; placing the electronic part on the mounting board so that an electrode of the electronic part overlaps the bump; and melting the bump to bond the pad and the electrode of the electronic part by solder.