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Low Noise High Frequency Test Probes

IP.com Disclosure Number: IPCOM000077553D
Original Publication Date: 1972-Aug-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Rice, DW: AUTHOR [+2]

Abstract

This is a special structuring for test probes utilizing conductive fluid to eliminate both the signal-to-noise and mechanical sticking problems. The device comprises a nylon housing element 10 which may be electrically connected with test apparatus by the electrical conductor 11. The electrical conductor 11 is connected with a terminal element 15, which is in turn electrically coupled with a gold tip test probe 12 via a mechanical spring 13 and the conductive fluid 14 within the housing 10. The mechanical spring 13 provides a test probe with a yieldable movement during testing operations. The conductive fluid 14 within the housing 10 provides a good electrical conductivity between the terminal element 15 and test probe 12, as well as a lubricating function for the test probe 12.

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Low Noise High Frequency Test Probes

This is a special structuring for test probes utilizing conductive fluid to eliminate both the signal-to-noise and mechanical sticking problems. The device comprises a nylon housing element 10 which may be electrically connected with test apparatus by the electrical conductor 11. The electrical conductor 11 is connected with a terminal element 15, which is in turn electrically coupled with a gold tip test probe 12 via a mechanical spring 13 and the conductive fluid 14 within the housing 10. The mechanical spring 13 provides a test probe with a yieldable movement during testing operations. The conductive fluid 14 within the housing 10 provides a good electrical conductivity between the terminal element 15 and test probe 12, as well as a lubricating function for the test probe 12.

A typical lubricating/conductive fluid formulation is as follows:

Wt. Volume Ftn.

Gold plated nickel particles

(5000 angstroms) 4.96 grams 0.194

Polysiloxane lubricating fluid 1.55 grams 0.806. The conductive fluid 14, by nature of the polysiloxane lubricant, minimizes test probe 12 sticking while the conductivity of the material significantly increases the signal-to-noise ratio.

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