IP Library › Granted Patent US 7,384,277
Granted Patent B1
US 7,384,277 · App. 11/611,874 · Granted Jun 10, 2008

Reinforced contact elements

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Quick Facts
Patent No.
US 7,384,277
App. No.
11/611,874
Granted
Jun 10, 2008
Kind
B1
Abstract

Embodiments of reinforced resilient elements and methods for fabricating same are provided herein. In one embodiment, a reinforced resilient element includes a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and a reinforcement member having a first end affixed to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is not affixed to the resilient member.

Claims (66)

1. A reinforced resilient element, comprising:

a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient member, and wherein the reinforcement member comprises silicon.

2. A reinforced resilient element, comprising:

a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient member, and wherein the resilient portion comprises a torsional spring.

3. A reinforced resilient element, comprising:

a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient member, and wherein the second end of the reinforcement member is affixed to a support structure coupled to the resilient element.

4. A reinforced resilient element, comprising:

a plurality of resilient elements configured to electrically probe a device to be tested, each of the resilient elements having a first end and an opposing second end; and

a reinforcement member having a first end affixed to each of the resilient elements at a point disposed between the first and the second ends of the resilient elements, an opposing second end disposed in a direction towards the second ends of the resilient elements, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient members.

5. The reinforced resilient element of claim 4 , wherein the second end of the reinforcement member is coupled to a support structure.

6. The reinforced resilient element of claim 4 , wherein the reinforcement member is electrically isolated from the plurality of resilient members.

7. A reinforced resilient element, comprising:

a probe substrate; and

at least one reinforced resilient element coupled to the probe substrate comprising:

a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient member, and wherein the reinforcement member comprises silicon.

8. A reinforced resilient element, comprising:

a probe substrate; and

at least one reinforced resilient element coupled to the probe substrate comprising:

a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient member, and wherein the resilient portion comprises a torsional spring.

9. A reinforced resilient element, comprising:

a probe substrate; and

a plurality of reinforced resilient elements coupled to the probe substrate, each reinforced resilient element comprising:

a resilient element configured to electrically probe a device to be tested, the resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to the resilient element at a point disposed between the first and second ends of the resilient element, an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient member.

10. The reinforced resilient element of claim 9 , wherein the second ends of the plurality of resilient elements are coupled to a support structure.

11. The reinforced resilient element of claim 10 , wherein the second end of the reinforcement member is coupled to the support structure.

12. The reinforced resilient element of claim 9 , wherein the reinforcement member is electrically isolated from the plurality of resilient members.

13. A method of fabricating an apparatus for use in testing a device, comprising:

providing a resilient element configured to electrically probe the device to be tested, the resilient element having a first end and an opposing second end; and

affixing a first end of a reinforcement member to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, wherein the reinforcement member has an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends of the reinforcement member maintained in a spaced apart relation to the resilient element, and wherein the resilient portion is etched into the reinforcement member.

14. A method of fabricating an apparatus for use in testing a device, comprising:

providing a resilient element configured to electrically probe the device to be tested, the resilient element having a first end and an opposing second end; and

affixing a first end of a reinforcement member to the resilient element at the first end thereof or at a point disposed between the first and the second ends of the resilient element, wherein the reinforcement member has an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends of the reinforcement member maintained in a spaced apart relation to the resilient element, and wherein the reinforcement member is fabricated from silicon.

15. A method of fabricating an apparatus for use in testing a device, further comprising:

providing a plurality of resilient elements configured to electrically probe the device to be tested, the resilient elements each having a first end and an opposing second end; and

affixing a first end of a reinforcement member to the plurality of resilient elements at the first ends thereof or at a point disposed between the first and the second ends of the resilient elements, wherein the reinforcement member has an opposing second end disposed in a direction towards the second end of the resilient member, and a resilient portion disposed between the first and second ends of the reinforcement member maintained in a spaced apart relation to the resilient elements.

16. The method of claim 15 , wherein the plurality of resilient elements are electrically isolated from the reinforcement member.

17. The method of claim 15 , further comprising:

affixing the second end of the reinforcement member to the plurality of resilient elements proximate their respective second ends.

18. The method of claim 15 , further comprising:

fabricating the plurality of resilient elements on a first substrate;

affixing the reinforcement member to the plurality of resilient elements; and

freeing the plurality of reinforced resilient elements from the first substrate.

19. The method of claim 18 , further comprising:

integrally fabricating a support structure in the first substrate and coupled to the respective second ends of the plurality of resilient elements.

20. A method of testing a device, comprising:

providing a probe card assembly comprising a probe substrate having a plurality of reinforced resilient elements coupled thereto, the reinforced resilient elements comprising:

a plurality of resilient elements configured to electrically probe a device to be tested, each resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to a plurality of the resilient elements at the first ends thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second ends of the resilient elements, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient elements;

contacting a plurality of terminals of the device with respective reinforced resilient elements;

providing one or more electrical signals to at least one of the terminals through the probe substrate;

moving at least one of the probe card assembly or the device to establish an initial contact between the plurality of terminals of the device and the tips of the reinforced resilient elements; and

further moving at least one of the probe card assembly or the device to establish a desired contact pressure between the plurality of terminals of the device and respective tips of the contact elements.

21. A semiconductor device tested by a method comprising:

providing a probe card assembly comprising a probe substrate having a plurality of reinforced resilient elements coupled thereto, the reinforced resilient elements comprising:

a plurality of resilient elements configured to electrically probe a device to be tested, each resilient element having a first end and an opposing second end; and

a reinforcement member having a first end affixed to a plurality of the resilient elements at the first ends thereof or at a point disposed between the first and the second ends of the resilient element, an opposing second end disposed in a direction towards the second ends of the resilient elements, and a resilient portion disposed between the first and second ends, wherein the resilient portion is disposed in a spaced apart relation to the resilient elements;

contacting a plurality of terminals of the device with respective reinforced resilient elements;

providing one or more electrical signals to at least one of the terminals through the probe substrate;

moving at least one of the probe card assembly or the device to establish an initial contact between the plurality of terminals of the device and the tips of the reinforced resilient elements; and

further moving at least one of the probe card assembly or the device to establish a desired contact pressure between the plurality of terminals of the device and respective tips of the contact elements.

Assignments (2)
RELEASE OF SECURITY INTEREST Recorded Aug 7, 2025
From: HSBC BANK USA, NATIONAL ASSOCIATION
To: FORMFACTOR, INC.
Reel/Frame 072853/0001 →
SECURITY INTEREST IN UNITED STATES PATENTS AND TRADEMARKS Recorded Jul 12, 2016
From: FORMFACTOR, INC.; ASTRIA SEMICONDUCTOR HOLDINGS, INC.; CASCADE MICROTECH, INC.; MICRO-PROBE INCORPORATED
To: HSBC BANK USA, NATIONAL ASSOCIATION
Reel/Frame 039184/0280 →