TRANSFER SHEET, ITS MANUFACTURING METHOD, WIRING BOARD, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a transfer sheet excellent in high-frequency transmission characteristic and used for forming a fine conductor circuit having excellent accuracy of position. SOLUTION: The transfer sheet 5 has a metallic layer 2 which is formed in a circuit pattern on a substrate 1 and transferred to the surface of an insulating layer 3 at the time of forming the conductor circuit 4. The metallic layer 2 has a coating film 6 composed of an organic resin and having a light transmittance of≤0.4 in the wavelength range of 150-400 nm. Since the portion of the coating film 6 not irradiated with a laser beam protects the metallic layer 2, a fine circuit pattern can be formed without compromising the surface flatness of the metallic layer 2 by suppressing the melting and deformation of the metallic layer 2 caused by the generated heat. COPYRIGHT: (C)2004,JPO