Air duct with EMI suppression
AssigneeQuanta Computer Inc.
InventorsChing-Jen Chen, Cheng-Hsien Lee
Life of this patent
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Abstract
An air duct formed from an electromagnetic wave absorber in the form of a sheet is disclosed. The sheet can be bent into a duct or scored, and folded at the score lines to bring the ends of the sheet into proximity. The ends can then be joined by adhesive, welding, or mechanical fasters. The air ducts disclosed herein provide dual functions of providing ventilation for electronic components in an electronic module, while at the same time, reducing electromagnetic interference (EMI). One or more air ducts, of the same or different dimensions, shapes, volumes can be combined with electronic modules, such as a server, to provide both ventilation and EMI suppression to various components within the electronic module.
Claims14
An air duct capable of both ventilating an electronic device and reducing electromagnetic interference (EMI) to the electronic device;
- the air duct comprising at least one wall consisting of an electromagnetic interference (EMI) wave absorber sheet;
- the sheet comprising a soft ferrite having its surface treated with a silane with no functional group, magnetite and silicone and further comprising flat, soft magnetic powder;
- and the sheet configured to absorb radio frequency waves so as to reduce electromagnetic interference (EMI);
- wherein the electromagnetic interference (EMI) wave absorber has a permeability (μ′) where μ′=150 (at 1 MHz);
- wherein the electromagnetic interference (EMI) wave absorber sheet further comprises a plurality of score lines, and the sheet is folded at the score lines to form the air duct and wherein the at least one wall consisting of the electromagnetic interference (EMI) sheet is configured as part of a conduit to convey ventilating air to the electronic device.
Dependencies are inferred from the claim text.