| 摘要 |
PROBLEM TO BE SOLVED: To provide a flame-retardant composition having flame retardancy and flexibility both as well as being excellent in solder heat resistance, moisture proof, and reliability in a high temperature, which is therefore suitable for use as a cover lay film for an FPC, solder resist, etc. SOLUTION: This invention comprises following items: a flame-retardant composition including polyester resin (A) which contains a bromine atom in a molecule; a hardened material of the composition for solder resist; an ink containing the composition and a colorant; a hardening method of the composition; an insulating protection film and an interlayer insulating film composed of the composition; and printed circuit boards including the films. COPYRIGHT: (C)2005,JPO&NCIPI |
