Method and apparatus for asperity sensing and storage
First Claim
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1. A fingerprint capture device comprising:
- a memory comprised of a plurality of memory cells wherein each memory cell has a corresponding electrical device;
a fingerprint contact surface disposed substantially coplanar to the memory wherein the fingerprint contact surface has a plurality of conductive paths formed through the fingerprint contact surface and wherein at least some of the conductive paths are substantially directly conductively coupled to at least some of the corresponding electrical devices.
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Abstract
A fingerprint capture device (10) has a plurality of charge storage devices (12) that couple through conductive surfaces (22) to conductive spheres (21) that are disposed within an epoxy that comprises a fingerprint contact surface (13). When raised portions of an object (26) appropriately contact certain conductive spheres (21), the corresponding charge storage device (12) will discharge. This discharging serves both to simultaneously sense the asperity features of the object and to store that sensed information as well.
37 Citations
27 Claims
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1. A fingerprint capture device comprising:
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a memory comprised of a plurality of memory cells wherein each memory cell has a corresponding electrical device;
a fingerprint contact surface disposed substantially coplanar to the memory wherein the fingerprint contact surface has a plurality of conductive paths formed through the fingerprint contact surface and wherein at least some of the conductive paths are substantially directly conductively coupled to at least some of the corresponding electrical devices. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device comprising:
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a random access memory comprising an array of memory cells and having exposed conductive pads electrically coupled to the memory cells;
anisotropic cured conductive epoxy disposed over at least a plurality of the exposed conductive pads wherein at least a majority of the anisotropic cured conductive epoxy is exposed. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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- 14. A device comprising a cured epoxy having discrete conductive elements disposed therein wherein at least a majority of the discrete conductive elements present a substantial resistance to current flow and are at least partially exposed on either side of the cured epoxy.
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21. A method of forming a device to simultaneously sense and store tactile information regarding asperities of an object comprising:
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providing a memory having exposed conductive pads on a surface thereof;
disposing an epoxy material having discrete conductive elements disposed therein on at least a portion of the surface to thereby contact and at least partially cover at least one of the exposed conductive pads;
compressing at least part of the epoxy material to thereby cause at least one of the discrete conductive elements to physically contact a conductive pad;
curing the epoxy material to harden the epoxy material and to shrink the epoxy material such that at least a portion of at least some of the discrete conductive elements are exposed. - View Dependent Claims (22, 23, 24)
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25. A fingerprint capture device comprising:
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a memory comprised of a plurality of discrete memory units, wherein each memory unit is comprised of memory cells, wherein each memory cell has a corresponding electrical device;
a fingerprint contact surface disposed substantially coplanar to at least some of the memory units wherein the fingerprint contact surface has a plurality of conductive paths formed through the fingerprint contact surface and wherein at least some of the conductive paths are conductively coupled to at least some of the corresponding electrical devices.
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26. A mechanism having an enabled state and a disabled state, comprising:
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a memory comprised of a plurality of memory cells wherein each memory cell has a corresponding electrical device;
a fingerprint contact surface disposed substantially coplanar to the memory wherein the fingerprint contact surface has a plurality of conductive paths formed through the fingerprint contact surface and wherein at least some of the conductive paths are conductively coupled to at least some of the corresponding electrical devices;
a processor operably coupled to the memory and being programmed to switch between the enabled state and the disabled state as a function, at least in part, of memory contents in the memory as entered through the fingerprint contact surface. - View Dependent Claims (27)
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Specification