Browse Prior Art Database

Grounding Device for Magnetoresistive Head Actuator

IP.com Disclosure Number: IPCOM000114939D
Original Publication Date: 1995-Feb-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Bratvold, DE: AUTHOR [+3]

Abstract

A method for grounding the actuator of a Direct Access Storage Device (DASD) is disclosed. A flex cable is used to connect the ground lines of the actuator to a metallic grounding clip that contacts an uncoated area of the base casting.

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This is the abbreviated version, containing approximately 86% of the total text.

Grounding Device for Magnetoresistive Head Actuator

      A method for grounding the actuator of a Direct Access Storage
Device (DASD) is disclosed.  A flex cable is used to connect the
ground lines of the actuator to a metallic grounding clip that
contacts an uncoated area of the base casting.

      This disclosure provides a low resistance ground path for the
magnetoresistive (MR) head when the actuator is installed into the
base casting.  A section of flex cable containing a ground line is
soldered to a metallic grounding clip.  The clip is a U-shaped
channel tapered along the length, width and height.  The base casting
has two tapered slots and a tapered side wall area with exposed
aluminum that match the angles of the clip.  The clip is held onto
the flex bracket by two elongated molded pins which pass through
holes in the legs of the clip.  When the actuator is installed, the
flex bracket and clip are inserted into the base casting.  The clip
contacts the insides of the two slots on one side of the opening and
the uncoated area of the base casting on the other.  As the clip
enters the base casting, it is deflected generating a sliding action
against the exposed aluminum area of the base casting penetrating the
oxide layer.  Once the clip reaches the fully installed position, a
normal force of one pound minimum is generated at the clip to
uncoated aluminum interface which is sufficient to complete the low
resistance electrical connection.  Since the...