摘要:
In a process for manufacturing a multilayer printed circuit board which comprises forming a resin insulating layer (12) and a conductor circuit (9) on a resin substrate (1), a metal layer (14) composed of at least one metal selected from among the metal elements of the 4 th through 7 th periods in Group 4A through Group 1B of the long-form periodic table of the elements, Al and Sn is formed on the surface of the resin insulating layer (12), the surface of the metal layer (14) is then cleaned with an acid, and thereafter the conductor circuit (19) is constructed on the metal layer (14).
摘要:
In a process for manufacturing a multilayer printed circuit board which comprises forming a resin insulating layer (12) and a conductor circuit (19) on a resin substrate (1), a metal layer (14) composed of at least one metal selected from among the metal elements of the 4 th through 7 th periods in Group 4A through Group 1B of the long-form periodic table of the elements, Al and Sn is formed on the surface of the resin insulating layer (12), the surface of the metal layer (14) is then cleaned with an acid, and thereafter the conductor circuit (19) is constructed on the metal layer (14).
摘要:
In a method of forming a metal film, an oxide film is removed on the surface of a nickel film using an aqueous solution of a reducing acid having a concentration of 2.0 to 10.0 mol/L, and then a different metal film is formed on the surface of the nickel film. The method of forming the metal film is useful in a process of manufacturing a multilayer printed circuit.
摘要:
A multilayer printed circuit board comprises a substrate board (101) carrying a lower-layer conductor circuit (104) and, as built up on the substrate board (101) successively and alternately, an interlayer resin insulating layer (102) and an upper-layer conductor circuit (105) in succession. The multilayer printed circuit board further comprises a metal layer (111a) composed of at least one metal selected from among metals having ionization tendencies not lower than tin but not higher than aluminum and noble metals as formed on the surface of said lower-layer conductor circuit (104) and a roughened layer (111b) superimposed on said metal layer (111a).
摘要:
In a process for manufacturing a multilayer printed circuit board which comprises forming a resin insulating layer (12) and a conductor circuit (19) on a resin substrate (1), a metal layer (14) composed of at least one metal selected from among the metal elements of the 4 th through 7 th periods in Group 4A through Group 1B of the long-form periodic table of the elements, A1 and Sn is formed on the surface of the resin insulating layer (12), the surface of the metal layer (14) is then cleaned with an acid, and thereafter the conductor circuit (19) is constructed on the metal layer (14).
摘要:
In a process for manufacturing a multilayer printed circuit board which comprises constructing a conductor circuit (104), roughening the conductor circuit (104) to provide a roughened surface (111), forming an interlayer resin insulating layer (102) over the roughened surface (111) of the conductor circuit (104) and forming openings (106) for via holes in a repeated sequence to construct conductor circuits comprised a plurality of layers isolated by interlayer resin insulating layers, an oxidation treatment is carried out after forming the roughened surface (111) on the conductor circuit (104) to provide an oxide film on the entire roughened surface (111), and thereafter the interlayer resin insulating layer (102) is constructed.
摘要:
In a process for manufacturing a multilayer printed circuit board which comprises forming a resin insulating layer (12) and a conductor circuit (19) on a resin substrate (1), a metal layer (14) composed of at least one metal selected from among the metal elements of the 4 th through 7 th periods in Group 4A through Group 1B of the long-form periodic table of the elements, Al and Sn is formed on the surface of the resin insulating layer (12), the surface of the metal layer (14) is then cleaned with an acid, and thereafter the conductor circuit (19) is constructed on the metal layer (14).