Electromagnetic interference shield for electronic devices
First Claim
Patent Images
1. An EMI shield comprising:
- a thermoformed sheet comprising;
a first surface, sidewalls extending at an angle from the first surface, and a crease between the first surface and sidewalls, wherein the first surface and sidewalls define a first enclosure portion;
a second surface, sidewalls extending at an angle from the second surface, and a crease between the second surface and sidewalls, wherein the second surface and sidewalls define a second enclosure portion, wherein a peripheral flange extends around the first enclosure portion and the second enclosure portion; and
a vacuum metallized layer disposed over the thermoformed sheet, wherein the vacuum metallized layer comprises a substantially uniform thickness over the first surface, second surface, sidewalls, peripheral flange, and creases.
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Accused Products
Abstract
An EMI shield for personal computers, cellular telephones, and other electronic devices is constructed from thermoformable polymeric material which is then metallized on all surfaces by vacuum metallization techniques to provide an inexpensive, lightweight, yet effective EMI shield.
63 Citations
13 Claims
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1. An EMI shield comprising:
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a thermoformed sheet comprising;
a first surface, sidewalls extending at an angle from the first surface, and a crease between the first surface and sidewalls, wherein the first surface and sidewalls define a first enclosure portion;
a second surface, sidewalls extending at an angle from the second surface, and a crease between the second surface and sidewalls, wherein the second surface and sidewalls define a second enclosure portion, wherein a peripheral flange extends around the first enclosure portion and the second enclosure portion; and
a vacuum metallized layer disposed over the thermoformed sheet, wherein the vacuum metallized layer comprises a substantially uniform thickness over the first surface, second surface, sidewalls, peripheral flange, and creases. - View Dependent Claims (2, 3, 4, 5)
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6. An EMI shield comprising:
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a shaped thermoform sheet created by heating a sheet of thermoplastic, drawing the sheet into a mold, and cooling the formed sheet, wherein the shaped thermoform sheet comprises a first enclosure portion conprising a peripheral flange coupled to a second enclosure portion that comprises a peripheral flange; and
a conductive layer deposited on the shaped thermoform sheet by thermally vaporizing a metal in a vacuum chamber. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification