| 摘要 |
The present invention relates to a reflective layer composition of a white coverlay film and a coverlay film using the same that are capable of ameliorating punchability through folding endurance and elasticity, are not included in a conventional white coverlay film and white ink, and do not involve a complex ink printing step process by: laminating a white reflective layer having constant endurance and elasticity as well as excellent reflectance, glossiness and flame resistance on one surface of an insulation base film; laminating a protection film for protecting the white reflective layer on an upper surface of the white reflective layer; and laminating an adhesive layer and a protective material on a rear surface of the insulation base film. The reflective layer composition of the white coverlay film described above is a composition formed of a particle, a resin and a hardener. The particle is an organic particle or a nonorganic particle. The resin is at least one selected from an acrylic resin, a polyester-based resin, a polyurethane-based resin, an epoxy-based resin, a vinyl-based resin, a polystyrene-based resin, a polyamide-based resin, and a urea-based resin. The white coverlay film layer of the present invention as configured above can be manufactured to have high reflectance, high shielding ability, excellent quality of appearance and uniformity without an ink printing process in a flexible printed circuit board manufacturing process used in the prior art. Therefore, provided is the coverlay film capable of increasing reflective efficiency of a light source so that the coverlay film can be used as a coverlay film for a back light unit for realizing excellent brightness and can also be used in the flexible printed circuit board manufacturing process. |
