Patent ID: 7585540

Claim:
A method for manufacturing a wiring substrate, consisting of: a first step of providing a substrate including C═C bonds and having a plurality of first areas and second areas that define areas for forming a plurality of wirings; a second step of washing the substrate with an alkali solution to provide the substrate with a uniform negative potential, the second step coming after the first step; a third step providing a first surface-active agent over an entire surface of the substrate to cationize the substrate, the first surface-active agent having an alkyl chloride system and the third step coming after the second step; a fourth step of droplet discharging a second surface-active agent directly over the first surface-active agent in the first areas and not in the second areas of the substrate to anionize only the first areas of the substrate, the fourth step coming after the third step; a fifth step of disposing a catalyst on the second surface-active agent, the fifth step coming after the fourth step; and a sixth step of depositing a metal layer on the catalyst to form a wiring, the sixth step coming after the fifth step.