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US 6,388,205 B1Granted
Printed circuit board with shielded circuitry
AssigneeGul Technologies Singapore LTD
InventorAh Lim Chua
Life of this patent
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AssigneeGul Technologies Singapore LTD
InventorAh Lim Chua
Estimating the term…
A PCB board with in-board EMI shielding in which a prescribed electrical circuitry within a PCB is shielded from EMI by fabricating a uniform metal shielding enclosure therearound. The shielded circuitry may be a single metal trace, a group of interconnected traces in the same or different layers of the same PCB, or a complete electrical circuitry spanning many different layers and locations within the same PCB. Using the same technology, groups of electrical circuitry that require isolation because of EMI may be fabricated together in proximity, with each group shielded from the EMI of the others. The metal shield contains a top shield in a layer above the circuitry, a bottom shield in a layer below the circuitry, and side shields adjacent the circuitry. There is no gap in the shielding structure, except whether the prescribed circuitry connects to another circuitry.
A printed circuit board comprising an electrical circuitry adapted for electrical connection with a second electrical circuitry, said electrical circuitry having a metal shield therearound, said metal shield forming a box-like enclosure with the electrical circuitry therein, wherein at least three sides of said box-like enclosure being at least partially embedded within said board.
A printed circuit board comprising an electrical circuitry adapted for electrical connection with a second electrical circuitry, said electrical circuitry having a metal shield therearound, said metal shield at least partially embedded within the interior of said board, wherein said shield comprises:
A method of providing electromagnetic shielding for electrical circuitry within a multi-layer printed circuit board comprising:
Dependencies are inferred from the claim text.