Patent ID: 9693467
Date: 2017-06-27
CPC Classifications: C25D,G11B,H05K

Claim:
1. A method for producing a suspension board with circuit comprising the steps of: (1) providing a first insulating layer on a metal supporting board so as to provide a first opening portion and a second opening portion penetrating in a thickness direction of the first insulating layer, (2) providing a first conductive layer including a first terminal on the first insulating layer so as to fill the inside of the first opening portion, (3) providing a first electroless plating layer on the surface of the first conductive layer by electroless plating, (4) providing a second insulating layer on the first insulating layer so as to provide a third opening portion penetrating in the thickness direction of the second insulating layer and exposing the first electroless plating layer and also forming the third opening portion so as to expose a part of the first electroless plating layer provided on the surface of the first conductive layer, (5) providing a second conductive layer including a second terminal on the second insulating layer so as to fill the inside of the third opening portion or on the second insulating layer and the first insulating layer so as to fill the second opening portion and the third opening portion, (6) providing a second electroless plating layer on the surface of the second conductive layer by electroless plating, (7) removing the first electroless plating layer corresponding to the first terminal and/or the second electroless plating layer corresponding to the second terminal by etching, (8) removing the metal supporting board in contact with the lower surface of the first conductive layer filling the inside of the first opening portion, and (9) providing an electrolytic plating layer on the surface of the first terminal with the first electroless plating layer removed and/or the surface of the second terminal with the second electroless plating layer removed and the lower surface of the first conductive layer exposed from the inside of the first opening portion by electrolytic plating supplying electricity from the metal supporting board.