FILM TYPE COIL AND METHOD OF MANUFACTURING SAME

Title:

FILM TYPE COIL AND METHOD OF MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/1986/000167

Kind Code:

A1

Abstract:

A film type coil consisting of an arbitrarily-selected insulating substrate film or sheet, and a layer of a metallic conductor provided on one or both surfaces of the substrate film and composed of a continuous, volute, thin wire, and characterized in that the width of a gap between two adjacent layers of the volute, metallic conductor is smaller than the thickness thereof; and a method of manufacturing this film type coil, consisting of the steps of forming patterned photoresist layers opposite each other on the upper and lower surfaces of foil or a sheet of a metallic conductor, subjecting both surfaces of the resultant foil or sheet to chemical corrosion until both surfaces of the foil or sheet have been corroded to a depth which is equal to 30-40% of the thickness of the foil or sheet, coating one of the resultant surfaces with an insulating synthetic resin or pasting an insulating substrate film or sheet on one of the same surfaces, subjecting the other surface of the resultant product to chemical corrosion again until the corroded grooves in both surfaces thereof have been communicated with each other to obtain a film type coil with a layer of thin metallic conductor formed thereon, and bonding as necessary the rear surfaces of two such film type coils on each other.

Inventors:

YAMAMOTO KUNITOSHI (JP)
MORI YASUJI (JP)
IWATA TORAYOSHI (JP)

Application Number:

PCT/JP1985/000334

Publication Date:

January 03, 1986

Filing Date:

June 13, 1985

Export Citation:

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Assignee:

NISSHA PRINTING (JP)

International Classes:

B32B3/14; B32B15/08; H01F5/00; H01F41/04; (IPC1-7): H01F5/00

Foreign References:

JPS4978159A

1974-07-27

Other References: