公开(公告)号：JP2000174435A

公开(公告)日：2000-06-23

申请号：JP30733399

申请日：1999-10-28

Applicant: IBM

Inventor： KENNETH FALLON ,  MAIGUERU A JIMAAZU ,  ROSS W KEITHLER ,  LAUFFER JOHN M ,  ROY H MAGNUSON ,  VOYA R MARKOVICH ,  AIRA MENISU ,  JIM P PAOLETTI ,  MAARIBESU PERINO ,  JOHN A WELSH ,  WILLIAM E WILSON

IPC: H05K3/42 ,  H05K1/05 ,  H05K3/00 ,  H05K3/10 ,  H05K3/44

Abstract: PROBLEM TO BE SOLVED: To obtain a circuit card, in which layers made of dielectric material for exposure type latent image formation are used on both opposing surfaces of a metal layer forming a power plane. SOLUTION: This method is provided for forming a printed circuit card. A metal layer 20 which functions as a power plane is sandwiched by a pair of layers 24 and 26 of a photoimageable material, capable of forming a latent with use of a light beam. Photoformed metal-filled vias 46 and photoformed plating through-hole 48 are in a photopatternable material. A signal circuit is formed on the two dielectric layers to be connected to the vias 46 and a through-hole 48. The board has a border 14 in its periphery, and the metal layer 20 has an end which is apart from an end of one 26 of the dielectric layers.