Printed Circuit Board and Manufacture Method Thereof
AssigneeTyco Electronics AMP Korea Co., Ltd.
InventorsYang Yun Choi, Maeng Goun Youn
Life of this patent
Estimating the term…
Abstract
A printed circuit board is disclosed having a substrate with an insulating layer, aluminum foil layers disposed on both sides of the insulating layer, and a through-hole formed in the insulating layer and aluminum foil layers. A metal layer is disposed over an exposed surface of the insulating layer positioned along an inner surface of the through-hole. A zinc film is positioned on a surface of the aluminum foil. A metal film is disposed over the zinc film. A plating film is disposed on a surface of the metal film. A circuit pattern is etched through the aluminum foil and the plating film.
Claims24
A printed circuit board comprising:
- a substrate having
- an insulating layer,
- aluminum foil layers disposed on both sides of the insulating layer, and
- a through-hole formed in the insulating layer and aluminum foil layers;
- a metal layer disposed over an exposed surface of the insulating layer positioned along an inner surface of the through-hole;
- a zinc film positioned on a surface of the aluminum foil;
- a metal film disposed over the zinc film;
- a plating film disposed on a surface of the metal film;
- and
- a circuit pattern etched through the aluminum foil and the plating film.
A manufacturing method for a printed circuit board comprising the steps of:
- (a) preparing an aluminum foil;
- (b) bonding the aluminum foil to both sides of an insulating layer;
- (c) forming a through-hole passing through the aluminum foil and the insulating layer;
- (d) forming a metal layer by depositing metal on an exposed portion of an inner surface of the through-hole on the insulating layer;
- (e) replacing a surface of the aluminum foil with a zinc (Zn) film;
- (f) forming a metal film by performing plating with respect to surfaces of the metal layer and the Zn film;
- and
- (g) forming a plating film on a surface of the metal film by plating.
Dependencies are inferred from the claim text.