Multi-layered circuit substrate and manufacturing method thereof
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United States of America Patent
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May 5, 1998
Grant Date -
N/A
app pub date -
Sep 11, 1996
filing date -
Sep 12, 1995
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Abstract
A multi-layered circuit substrate and a manufacturing method thereof comprising the steps of coating the upper surface of a substrate with a photosensitive insulating layer; exposing and developing the photosensitive insulating layer to form a photosensitive insulating layer of predetermined pattern and pattern spaces; forming a conductive layer by printing a conductive ink in the pattern spaces; and forming a plurality of layers by performing the previous steps, each layer comprising a photosensitive insulating layer of predetermined pattern and pattern spaces and a conductive layer formed in the pattern spaces. The method further comprises the steps of coating an uppermost layer of the plurality of layers with an adhesive insulating layer, forming a metallic thin-film on the adhesive insulating layer by thermal pressing; etching the metallic thin-film to form a predetermined pattern of a metallic thin film; and forming a through hole into which a conductive material is implanted, the through hole penetrating the substrate, conductive layer, photosensitive insulating layer and metallic thin-film so to electrically connect the conductive layer to the patterned metallic thin-film.
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