Wire segment based interposer for high frequency electrical connection
First Claim
1. A resilient, conductive button useful as an electrical contact element between conductive pads, comprising:
- a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element comprising at least one thin wire formed in a spiral extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
such that when the first end of the body contacts a first conductive pad, and the second end of the body contacts a second conductive pad, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the conducting element has sufficient flexibility such that the conducting element does not add substantially to the compressibility or relaxability of the resilient body.
1 Assignment
0 Petitions
Accused Products
Abstract
An interposer for a land grid array includes a dielectric grid having an array of holes and a resilient, conductive button disposed in one or more of the holes. The button includes an insulating core, a conducting element wound around the insulating core, and an outer shell surrounding the conducting element. The characteristics of the conducting element and the buttons may be chosen such that the contact force and resistance, and compressibility or relaxability of the conductive buttons can be selected within wide limits. Contact areas between the shell and the conducting element urge a substantially corresponding displacement in both the conducting element and the shell when the button is under compression or relaxation. The interposer alternatively can include an insulating sheet and rather than conductive buttons contain conducting elements disposed therein having contact areas with the block.
The interposer when positioned between a land grid array and an electrical circuit component can accommodate relatively large nonplanarity between respective mating surfaces of the two interconnected components while establishing and maintaining contact between each conducting element and the opposing contact pads of each component. A high local contact force is produced at each end of the conducting element against an opposing electrical contact or contact pad of a circuit device to establish a good electrical connection with the interposer which thus electrically interconnects the land grid array and the circuit component. The new interposer design is eminently amenable to high frequency and high current applications.
235 Citations
48 Claims
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1. A resilient, conductive button useful as an electrical contact element between conductive pads, comprising:
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a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element comprising at least one thin wire formed in a spiral extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
such that when the first end of the body contacts a first conductive pad, and the second end of the body contacts a second conductive pad, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the conducting element has sufficient flexibility such that the conducting element does not add substantially to the compressibility or relaxability of the resilient body. - View Dependent Claims (2, 3, 4, 6)
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5. A resilient, conductive button useful as an electrical contact element between conductive pads, comprising:
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a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element comprising a plurality of wires twisted together extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
such that when the first end of the body contacts a first conductive pad, and the second end of the body contacts a second conductive pad, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the conducting element has sufficient flexibility such that the conducting element does not add substantially to the compressibility or relaxability of the resilient body.
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7. A resilient, conductive button useful as an electrical contact element between conductive pads, comprising:
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a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body; and
c) an electrically conductive shielding layer surrounding substantially all of the length of the resilient body, insulated from the conducting element;
such that when the first end of the body contacts a first conductive pad, and the second end of the body contacts a second conductive pad, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the conducting element has sufficient flexibility such that the conducting element does not add substantially to the compressibility or relaxability of the resilient body. - View Dependent Claims (8, 9, 10)
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11. A resilient, conductive button useful as an electrical contact element between conductive pads, comprising:
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a) a resilient body having a first end and a second end and a length therebetween;
comprising;
i) a resilient insulating core having a first end and a second end and a length therebetween, and ii) a resilient insulating outer shell surrounding the length of the insulating core; and
b) a conducting element extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
comprising a conductor between the insulating core and the insulating outer shell, extending from a first end of the insulating core to the second end of the insulating core;
such that when the first end of the body contacts a first conductive pad, and the second end of the body contacts a second conductive pad, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the conducting element has sufficient flexibility such that the conducting element does not add substantially to the compressibility or relaxability of the resilient body. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An interposer for a land grid array, for providing conduction between a first and a second array of conductive pads at a predetermined contact force, the interposer comprising:
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a dielectric grid having an array of holes therethrough; and
a plurality of resilient, conductive buttons disposed in the array of holes, each comprising;
a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element comprising at least one thin wire formed in a spiral extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
such that when the interposer is placed between the first and second array of contact pads, the first end of the body contacts a conductive pad in the first array of contact pads, and the second end of the body contacts a second conductive pad in the second array of contact pads, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the resilient body and conducting element being chosen such that the contact force is a preselected value. - View Dependent Claims (20, 21, 22, 23, 24, 40)
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25. An interposer for a land grid array, for providing conduction between a first and a second array of conductive pads at a predetermined contact force, the interposer comprising:
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a dielectric grid having an array of holes therethrough; and
a plurality of resilient, conductive buttons disposed in the array of holes, each comprising;
a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element comprising a plurality of wires, twisted together extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
such that when the interposer is placed between the first and second array of contact pads, the first end of the body contacts a conductive pad in the first array of contact pads, and the second end of the body contacts a second conductive pad in the second array of contact pads, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the resilient body and conducting element being chosen such that the contact force is a preselected value. - View Dependent Claims (26)
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27. An interposer for a land grid array for providing conduction between a first and a second array of conductive pads at a predetermined contact force, the interposer comprising:
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a dielectric grid having an array of holes therethrough; and
a plurality of resilient, conductive buttons disposed in the array of holes, each comprising;
a) a resilient body having a first end and a second end and a length therebetween;
b) a conducting element extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body; and
c) an electrically conductive shielding layer surrounding substantially all of the length of the resilient body, insulated from the conducting element;
such that when the interposer is placed between the first and second array of contact pads, the first end of the body contacts a conductive pad in the first array of contact pads, and the second end of the body contacts a second conductive pad in the second array of contact pads, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad; and
the resilient body and conducting element being chosen such that the contact force is a preselected value. - View Dependent Claims (28, 29, 30, 31)
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32. An interposer for a land grid array, for providing conduction between a first and a second array of conductive pads at a predetermined contact force, the interposer comprising:
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a dielectric grid having an array of holes therethrough; and
a plurality of resilient, conductive buttons disposed in the array of holes, each comprising;
a) a resilient body having a first end and a second end and a length therebetween;
comprising;
i) a resilient insulating core having a first end and a second end and a length therebetween, and ii) a resilient insulating outer shell surrounding the length of the insulating core; and
b) a conducting element extending continuously through the length of the body from the first end of the body to the second end of the body, being electrically exposed at both ends of the body;
comprising a conductor between the insulating core and the insulating outer shell, extending from a first end of the insulating core to the second end of the insulating coresuch that when the interposer is placed between the first and second array of contact pads, the first end of the body contacts a conductive pad in the first array of contact pads and the second end of the body contacts a second conductive pad in the second array of contact pads, the conductive element forms an electrically conductive path through the button from the first conductive pad to the second conductive pad, and the resilient body and conducting element being chosen such that the contact force is a preselected value. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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41. An interposer for a land grid array, for providing conduction between a first and a second array of conductive pads, the interposer comprising:
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a) a resilient, dielectric sheet having a first surface and a second surface; and
b) a plurality of conducting elements each comprising at least one thin wire formed in a spiral positioned within the sheet, extending from the first surface to the second surface, and the conducting elements are positioned within the sheet only in locations corresponding to the conductive pads in the first and second arrays of conductive pads, such that when the interposer is placed between the first and second array of contact pads, the conductive elements form an electrically conductive path from the a conductive pad in the first array to a conductive pad in the second array. - View Dependent Claims (42, 43, 44, 47, 48)
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45. An interposer for a land grid array, for providing conduction between a first and a second array of conductive pads, the interposer comprising:
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a) a resilient, dielectric sheet having a first surface and a second surface; and
b) a plurality of conducting elements each comprising a plurality of wires twisted together positioned within the sheet, extending from the first surface to the second surface, and the conducting elements are positioned within the sheet only in locations corresponding to the conductive pads in the first and second arrays of conductive pads, such that when the interposer is placed between the first and second array of contact pads, the conductive elements form an electrically conductive path from the a conductive pad in the first array to a conductive pad in the second array. - View Dependent Claims (46)
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Specification