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US 7,442,882 B2Granted
3D checkerboard perforation pattern for increased shielding effectiveness
AssigneeInternational Business Machines Corporation
InventorsDon A. Gilliland, Charles C. Stratton
Life of this patent
Estimating the term…
Abstract
An improved electromagnetic radiation (EMR) shield that has minimal airflow resistance is presented. The EMR shield includes: a base plate; and plurality of columns that project away from the base plate, wherein each of the columns has a first end that is attached to the base plate, a second end that is distal to the base plate, and a side surface that has at least one side hole therein.
Claims18
An electromagnetic shield comprising:
- a base plate;
- a plurality of columns that project away from the base plate, wherein each of the columns has a first end that is attached to the base plate, a second end that is distal to the base plate, and a side surface that has at least one side hole therein;
- and
- a plurality of base plate holes in the base plate, wherein each of the base plate holes is oriented between at least two first ends of two columns that project away from the base plate.
1 more element
A system comprising:
- a circuit board;
- and
- an electromagnetic shield mounted near the circuit board, wherein the electromagnetic shield provides cooling airflow to pass through the electromagnetic shield while minimizing a passage of electromagnetic radiation from at least one component that is mounted on the circuit board, and wherein the electromagnetic shield includes:
- a base plate;
- a plurality of columns that project away from the base plate, wherein each of the columns has a first end that is attached to the base plate, a second end that is distal to the base plate, and a side that has at least one side hole therein, wherein the second end of at least one of the columns has a hole to promote air passage through the base plate.
2 more elements
Dependencies are inferred from the claim text.