High Sensitivity Silicon Piezoresistor Force Sensor
First Claim
1. A sense die comprising:
- a chip comprising a slab;
one or more sense elements supported by the slab, wherein the ratio of the width of the slab to the distance between the one or more sense elements is at least approximately 2/1;
one or more bond pads supported by a first side of the chip, each of the one or more bond pads electrically coupled to at least one of the one or more sense elements;
a structural frame disposed on the first side of the chip, wherein the structural frame is disposed at least partially about the slab; and
one or more electrical contacts extending through the structural frame, wherein the one or more electrical contacts are electrically coupled to the one or more bond pads.
1 Assignment
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Accused Products
Abstract
Embodiments relate to systems and methods for sensing a force using a sense die. A sense die may comprise a chip comprising a slab; an actuation element configured to contact the slab at or near the center of the slab, and configured to apply a force to the slab; and one or more sense elements supported by the slab, wherein the ratio of the width of the slab to the distance between the one or more sense elements is at least 2/1. A method may comprise providing a sense die comprising a chip having a slab formed thereon; applying a force to the slab of the sense die; and determining the magnitude of the force applied to the slab via one or more sense elements attached to the slab, wherein the ratio of the width of the slab to the distance between the sense elements is greater than 2/1.
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Citations
20 Claims
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1. A sense die comprising:
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a chip comprising a slab; one or more sense elements supported by the slab, wherein the ratio of the width of the slab to the distance between the one or more sense elements is at least approximately 2/1; one or more bond pads supported by a first side of the chip, each of the one or more bond pads electrically coupled to at least one of the one or more sense elements; a structural frame disposed on the first side of the chip, wherein the structural frame is disposed at least partially about the slab; and one or more electrical contacts extending through the structural frame, wherein the one or more electrical contacts are electrically coupled to the one or more bond pads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of sensing a force using a sense die, the method comprising:
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providing a sense die comprising a chip having a slab formed thereon; applying a force to the slab of the sense die; and determining the magnitude of the force applied to the slab via one or more sense elements attached to the slab, wherein the ratio of the width of the slab to the distance between the one or more sense elements is greater than approximately 2/1. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A sense die comprising:
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a chip comprising a slab; an actuation element configured to contact the slab at or near the center of the slab, and configured to apply a force to the slab; and one or more sense elements supported by the slab, wherein the ratio of the width of the slab to the distance between the one or more sense elements is greater than approximately 2/1, and wherein the distance between the sense elements is centered on the contact point between the actuation element and the slab. - View Dependent Claims (17, 18, 19, 20)
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Specification