Flexible metal-clad dielectrics, having beryllium copper foil

Details Flexible metal-clad dielectrics, having beryllium copper foil Flexible metal-clad dielectrics, having beryllium copper foil

1996-11-12

2000-04-11

Kincaid, Kristine

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174256, 1741264, 174254, H01B 700

Patent

active

060490411

ABSTRACT:
The invention provides a flexible metal-clad dielectric including a Be--Cu alloy foil, with an enriched electrical conductivity and a mean grain size of 20 .mu.m or less, which is laminated with a highly flexible resin film. The invention thus has improved bending characteristic and significantly reduces failures in flexible printed circuit boards.

REFERENCES:
patent: 3936575 (1976-02-01), Watanabe et al.
patent: 4493568 (1985-01-01), Estabrooks
patent: 4657601 (1987-04-01), Guha
patent: 5156710 (1992-10-01), Chen et al.
patent: 5274195 (1993-12-01), Murphy et al.
patent: 5384432 (1995-01-01), Noro et al.
patent: 5424030 (1995-06-01), Takahashi
patent: 5496970 (1996-03-01), Spencer
patent: 5527997 (1996-06-01), Saen et al.

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