Apparatus and method for electrostatic discharge protection
First Claim
Patent Images
1. A biometric sensor comprising:
- a flexible substrate comprising a sensing side surface and a sensing element side surface opposing the sensing side surface;
a biometric sensor portion comprising biometric image sensing elements formed on the sensing element side surface forming at least part of a biometric sensor array sensing capacitively induced changes induced by a biometric in the vicinity of the biometric image sensing elements;
a biometric sensor controller integrated circuit mounted to the flexible substrate on the sensing side surface of the flexible substrate;
an edge surface of the flexible substrate including at least one conductively plated perforation in the flexible substrate; and
an electro-static discharge element formed on or as part of the flexible substrate and electrically connected to the at least one conductively plated perforation.
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Abstract
Embodiments of the invention provide a substrate and a method for constructing a substrate with electrostatic discharge protection. The substrate includes an edge surface with at least one plated castellation capable of conducting electrostatic discharge. The at least one plated castellation is connected to a circuit trace on at least one of the bottom surface and the top surface of the substrate. The method includes punching holes along at least a portion of a perimeter of each of a plurality of substrates in a substrate array, plating the holes with a conductive material, and cutting each of the plurality of substrates along cut lines that bisect at least some of the holes.
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Citations
20 Claims
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1. A biometric sensor comprising:
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a flexible substrate comprising a sensing side surface and a sensing element side surface opposing the sensing side surface; a biometric sensor portion comprising biometric image sensing elements formed on the sensing element side surface forming at least part of a biometric sensor array sensing capacitively induced changes induced by a biometric in the vicinity of the biometric image sensing elements; a biometric sensor controller integrated circuit mounted to the flexible substrate on the sensing side surface of the flexible substrate; an edge surface of the flexible substrate including at least one conductively plated perforation in the flexible substrate; and an electro-static discharge element formed on or as part of the flexible substrate and electrically connected to the at least one conductively plated perforation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 19)
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8. A method of constructing a biometric sensor comprising:
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providing a flexible substrate comprising a sensing side surface and a sensing element side surface opposing the sensing side surface; providing a biometric sensor portion comprising biometric image sensing elements formed on the sensing element side surface forming at least part of a biometric sensor array sensing capacitively induced changes induced by a biometric in the vicinity of the biometric image sensing elements; providing a biometric sensor controller integrated circuit mounted to the flexible substrate on the sensing side surface of the flexible substrate; punching via holes at least partially through the flexible substrate along at least a portion of a perimeter of the flexible substrate; plating the via holes with a conductive material; and electrically connecting the plating of at least some of the vias holes to an electrostatic discharge element formed on or as part of the flexible substrate. - View Dependent Claims (9, 10, 11, 12, 13, 14, 20)
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15. A method of constructing a biometric sensor having electrostatic discharge protection, the method comprising:
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providing a flexible substrate comprising a sensing side surface and a sensing element side surface opposing the sensing side surface; providing a biometric sensor portion comprising biometric image sensing elements formed on the sensing element side surface forming at least part of a biometric sensor array sensing capacitively induced changes induced by a biometric in the vicinity of the biometric image sensing elements; providing a biometric sensor controller integrated circuit mounted to the flexible substrate on the sensing side surface of the flexible substrate; punching holes along at least a portion of a perimeter of the flexible substrate and at least partially through the flexible substrate; plating the holes with a conductive material; electrically connecting the plating of at least some of the vias holes to an electrostatic discharge element formed on or as part of the flexible substrate; cutting each of the plurality of substrates along cut lines that bisect at least some of the holes; and connecting the electrostatic discharge element to a known potential. - View Dependent Claims (16, 17, 18)
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Specification