Browse Prior Art Database

Cold Ship Moisture Retainers

IP.com Disclosure Number: IPCOM000034965D
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Betterman, VA: AUTHOR [+4]

Abstract

The IBM 9332 disk drive uses an absorbent material, strategically located, to prevent water which is condensed following a product shipment in a cold atmosphere from dripping onto the electronics. This moisture, combined with DC power and impurities present on the board, can cause shorts in the electronics. When the IBM 9332 unit is shipped in a cold environment and then moved into a warmer, more moist environment, moisture normally condenses on the actuator housings and drips onto the driver board located beneath them. This moisture can combine with chemicals in the air and on the surface of the board to form a solution which damages the driver board if power is applied before the board completely dries.

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Cold Ship Moisture Retainers

The IBM 9332 disk drive uses an absorbent material, strategically located, to prevent water which is condensed following a product shipment in a cold atmosphere from dripping onto the electronics. This moisture, combined with DC power and impurities present on the board, can cause shorts in the electronics. When the IBM 9332 unit is shipped in a cold environment and then moved into a warmer, more moist environment, moisture normally condenses on the actuator housings and drips onto the driver board located beneath them. This moisture can combine with chemicals in the air and on the surface of the board to form a solution which damages the driver board if power is applied before the board completely dries. Several methods could be used to prevent this but many, such as sealing the unit in plastic or including large amounts of desiccant during shipment, are cost- or logistics-prohibitive. A low-cost means of solving this problem is implemented whereby the moisture was controlled rather than eliminated. This moisture control was accomplished by installing a small strip of a self-stick moisture-absorbing material onto the bottom of each of the actuator housings. Any moisture that is condensed following cold shipment is trapped in this material and prevented from dripping onto the driver board beneath. The moisture is then dissipated through evaporation and causes no harm. A commercially available acoustic foam provided both the required a...