Flexible multilayer wiring board and manufacture method thereof
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United States of America Patent
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Oct 3, 2006
Issued Date -
N/A
app pub date -
Jan 14, 2003
filing date -
Jan 15, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
Metal foil is laminated via an insulating layer so as to cover the first layer circuit wiring formed on a conductive substrate, and a resist layer is formed so as to cover the second layer circuit wiring formed by pattern-etching the metal foil. Using the conductive substrate as a power feeding layer, a conductive material is filled, by electrolytic plating, in interlayer via holes each formed by applying a laser beam to the resist layer, thereby to establish interlayer connection between the first layer circuit wiring and the second layer circuit wiring. Subsequently, the resist layer is removed, and then, using the conductive substrate as a power feeding layer, a conductive material is filled, by electrolytic plating, in hole portions of an insulating layer formed so as to cover the second layer circuit wiring, thereby to form external connection terminals. Then, the conductive substrate is removed entirely or partly to expose the first layer circuit wiring, thereby to manufacture a flexible multilayer wiring board.
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