Continuous mesh EMI shield for pulse oximetry sensor
First Claim
Patent Images
1. A method for providing an electromagnetic shield for a photodetector, comprising the steps of:
- providing an insulating layer;
providing a wire mesh screen;
laminating said wire mesh screen to said insulating layer to produce a laminated sandwich;
cutting out individual electromagnetic shields from said laminated sandwich; and
placing one of said electromagnetic shields adjacent said photodetector, with said insulating layer facing said photodetector.
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Accused Products
Abstract
An improved electromagnetic shield for a photodetector which uses a wire mesh screen laminated to an insulating layer. A portion of the wire mesh screen and laminated layer sandwich can then be cut out to provide an individual electromagnetic shield. The sandwich combination is flexible, and can be easily wrapped around the photodetector. Preferably, an adhesive is on one side of the insulating layer, to allow the wrapped combination to adhere to the photodetector.
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Citations
21 Claims
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1. A method for providing an electromagnetic shield for a photodetector, comprising the steps of:
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providing an insulating layer; providing a wire mesh screen; laminating said wire mesh screen to said insulating layer to produce a laminated sandwich; cutting out individual electromagnetic shields from said laminated sandwich; and placing one of said electromagnetic shields adjacent said photodetector, with said insulating layer facing said photodetector. - View Dependent Claims (2, 3, 4, 5)
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6. A method for providing an electromagnetic shield for a photodetector, comprising:
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providing an insulating layer; providing a wire mesh screen; laminating said wire mesh screen to said insulating layer to produce a laminated sandwich; cutting out individual electromagnetic shields from said laminated sandwich; and placing one of said electromagnetic shields adjacent said photodetector, with said insulating layer facing said photodetector; wherein said insulating layer is a double sided adhesive layer bonded to a release liner on at least one side, wherein said cutting step cuts through said double sided adhesive layer but not said release liner.
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7. A method for providing an electromagnetic shield for a photodetector, comprising the steps of:
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providing an insulating layer as a double sided adhesive layer bonded to a release liner; providing a copper wire mesh screen; laminating said wire mesh screen to said insulating layer to produce a laminated sandwich; cutting out individual electromagnetic shields from said laminated sandwich by cutting through said copper wire mesh screen and said insulating layer, but not through said release liner; separating one of said electromagnetic shields from said release liner; and at least partially enclosing said photodetector with said one of said electromagnetic shields, with a side of said electromagnetic shield having said insulating layer being adjacent said photodetector, and including, within the area wrapped by said electromagnetic shield, leads connected to said photodetector up to a shield around said leads.
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8. A sensor comprising:
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a photodetector mounted in said sensor; a wire mesh screen; and an insulating layer bonded to said wire mesh screen to form an electromagnetic shield, said electromagnetic shield at least partially enclosing said photodetector. - View Dependent Claims (9, 10, 11, 12)
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13. A pulse oximeter sensor comprising:
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a photoemitter mounted in said sensor; a photodetector mounted in said sensor; a copper wire mesh screen; an insulating layer bonded to said wire mesh screen to form an electromagnetic shield, said electromagnetic shield at least partially enclosing said photodetector; an adhesive bonded to said insulating layer for holding said electromagnetic shield in a wrapped position; and wherein said electromagnetic shield is also at least partially enclosing leads of said photodetector up to a shield for said leads.
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14. A sensor comprising:
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a photodetector mounted in said sensor; an insulating layer; and a conductive layer bonded to said insulating layer to form an electromagnetic shield, said electromagnetic shield at least partially enclosing said photodetector; said conductive layer being sufficiently transparent to block less than 50% of the light directed at said photodetector, and being sufficiently conductive to reduce electromagnetic interference by at least 50% compared to an unshielded photodetector. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification