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    • 6. 发明授权
    • Multilayer circuit board and a method for fabricating the same
    • 多层电路板及其制造方法
    • US5478972A
    • 1995-12-26
    • US295461
    • 1994-08-25
    • Daisuke MizutaniKishio Yokouchi
    • Daisuke MizutaniKishio Yokouchi
    • H01L23/12H05K3/40H05K3/46H05K1/00
    • H05K3/4632H05K3/4038H05K3/4617H05K2201/0129H05K2201/068H05K2201/10287H05K2203/0235
    • An interlayer connection wiring penetrating each of resin films constituting a multilayer circuit board and a surface wiring connected to the interlayer connection wiring are formed in predetermined positions on surfaces of each resin film. The resin films are laminated while being positioned so that the interlayer connection wiring of one of each adjacent pair of the circuit bases is superposed on a part of the surface wiring of the other, and are thereafter treated under a high-temperature and high-pressure condition to be combined with each other. If a resin film formed of a thermoplastic resin is adopted, the laminated resin films are combined by intermixing the interfaces of each adjacent pair of resin films. As the resin films shrink when the laminated resin films is cooled to ordinary temperature, a compressive force is applied to the contact surfaces of the interlayer connection wiring and the surface wiring. A resin block in which metal wires disposed parallel to each other are embedded is sliced perpendicularly to the metal wires to form resin films each having interlayer connection wiring elements with projections formed on opposite end portions of each wiring element. The projections are utilized to ensure reliable connections between the interlayer connection wiring of one of each adjacent pair of resin films and the surface wiring formed on the other.
    • 在每个树脂膜的表面上的预定位置处形成穿过构成多层电路板的树脂膜和连接到层间连接布线的表面布线的层间连接布线。 树脂膜被定位成层叠,使得相邻的一对电路基板中的一个的层间连接布线叠置在另一个的表面布线的一部分上,然后在高温高压 条件相互结合。 如果采用由热塑性树脂形成的树脂膜,则通过混合每个相邻树脂膜的界面来组合层压树脂膜。 当层压树脂膜冷却至常温时树脂薄膜收缩,对层间连接布线和表面布线的接触面施加压缩力。 嵌入彼此平行布置的金属线的树脂块与金属线垂直地切割,以形成树脂膜,每个树脂膜具有形成在每个布线元件的相对端部上的突起的层间连接布线元件。 这些突起用于确保每个相邻的一对树脂膜中的一个的层间连接布线与另一个树脂膜之间形成的表面布线之间的可靠连接。