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Tribological Isolation of a Logic Card

IP.com Disclosure Number: IPCOM000118572D
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Hu, PY: AUTHOR

Abstract

When a 3570 cartridge is inserted into the drive and the door is wide open and traveling towards the inside of the drive, the door will rub against the logic card and, thereby, generating tribo charge against the card, it will cause failure. This is especially true when the card is in close proximity to the cartridge.

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Tribological Isolation of a Logic Card

      When a 3570 cartridge is inserted into the drive and the door
is wide open and traveling towards the inside of the drive, the door
will rub against the logic card and, thereby, generating tribo charge
against the card, it will cause failure.  This is especially true
when the card is in close proximity to the cartridge.

      A strip of antistatic dissipative layer of plastic sheeting was
designed and mounted on the side of the card, which is in close
proximity to the cartridge door.  When the door comes in contact and
rubbing, the tribo charge will be generated on the surface of the
dissipative plastic, which has the unique property behaving like a
high resistance  semiconductor, which dissipates the electrical
energy and will prevent  the charge from ever building up.  At the
same time the plastic sheeting  is highly resistive and will not
short out the many conductive protrusions, due to solder joints and
exposed wirings.  The mechanical  attachment of the semiconductive
strip is shown.