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Highly Accelerated Stress Test

IP.com Disclosure Number: IPCOM000053140D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Gunn, JE: AUTHOR [+2]

Abstract

The apparatus shown here allows statistical sample sizes of electronic components to be exposed to high temperature (100-200 degrees C) controlled humidity environments of various gaseous natures with electrical bias applied. Because the system is run at high temperature and pressure, there is a great driving force to accelerated diffusion, permeation and chemical rate kinetics, resulting in a shortened product qualification cycle.

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Highly Accelerated Stress Test

The apparatus shown here allows statistical sample sizes of electronic components to be exposed to high temperature (100-200 degrees C) controlled humidity environments of various gaseous natures with electrical bias applied. Because the system is run at high temperature and pressure, there is a great driving force to accelerated diffusion, permeation and chemical rate kinetics, resulting in a shortened product qualification cycle.

In the apparatus shown above, a first vessel 1 is filled with deionized water to approximately 50% of its capacity. Gas (e.g., N(2), O(2), air) from one or more canisters 2 is bubbled through the liquid in vessel 1, through control valve 3, to produce a water-saturated atmosphere above the liquid. After being heated, the water-saturated atmosphere is passed at constant pressure through a valve 4 into another vessel 5 which contains the electrical components to be tested. If necessary for complete humidity control, dry gas can be introduced into vessel 5 directly from canister 2 through valve 6. A relief valve 7 provides the means for maintaining pressure control within vessel 5. Electrical testing is done by means of electrical lead-throughs 8.

By controlling the temperature of the first vessel 1, the partial pressure of the water in the gas passing into the second vessel 5 is controlled. For example, if vessel 1 is kept at a temperature of 141.9 degrees and vessel 5 is kept at a temperature of 150 degree...