Electromagnetic interference shielding filter manufacturing...

Metal working – Method of mechanical manufacture – Electrical device making

Reexamination Certificate

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C029S592100

Reexamination Certificate

active

07343673

ABSTRACT:
An electromagnetic interference (EMI) shielding filter includes a conductive pattern for shielding electromagnetic waves; and blackened layers formed on a surface of the conductive pattern. The electromagnetic interference (EMI) shielding filter is manufactured by preparing a base film; forming on the base film a first blackened layer, a conductive layer, and a second blackened layer in sequence; and patterning the first blackened layer, the conductive layer, and the second blackened layer by using a same mask, and forming on front and rear surfaces of an EMI shielding layer a conductive pattern comprising the first and second blackened layers.

REFERENCES:
patent: 4760456 (1988-07-01), Liang
patent: 2004/0231873 (2004-11-01), Shimamura et al.

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