Patent ID: 7485813

Claim:
An article of manufacture for shielding electromagnetic wave through aperture, said article of manufacture comprising: a plurality of conducting sheets, wherein said conducting sheets shield electromagnetic wave; wherein a first conducting sheet of said plurality of conducting sheets has a first pattern of apertures; wherein a first aperture in said first pattern of apertures has a first opening on said first conducting sheet and first one or more walls; wherein a first wall of said first one or more walls is a first portion of said first conducting sheet cut along a first cut path and bent on a first uncut periphery portion of said first opening; wherein at least a portion of said first cut path is on a periphery of said first opening; wherein said plurality of conducting sheets are stacked up in parallel; wherein a second pattern of apertures of a second conducting sheet of said plurality of conducting sheets aligns with said first pattern of apertures; wherein a second aperture of said second pattern of apertures has a second opening in said second conducting sheet and second one or more walls; wherein said first aperture aligns with said second aperture such that said first one or more walls pass through said second opening; wherein a first edge of said first wall contacts a surface of a second wall of said second one or more walls; wherein said second wall has an indentation along a second edge of said second wall; and wherein said indentation fits said first edge of said first wall to secure said first wall normal to said first conducting sheet at said first opening.