Browse Prior Art Database

Linear Surface for Servo Track Writer

IP.com Disclosure Number: IPCOM000114993D
Original Publication Date: 1995-Feb-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Ohata, M: AUTHOR [+2]

Abstract

Disclosed is the "Linear Surface" which extension line crosses the pivot center for Rotary Servo Track Writer (STW) of Hard Disk Drive (HDD).

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Linear Surface for Servo Track Writer

      Disclosed is the "Linear Surface" which extension line crosses
the pivot center for Rotary Servo Track Writer (STW) of Hard Disk
Drive (HDD).

      The Figure explains an "Actuator Assembly" and a condition that
a prolongation of "Linear Surface" intersects to the pivot center.
Rotary STW writes the track by pushing this surface.  To achieve high
track density, this surface needs tight controled surface in
roughness, dimension and tolerance.

      An accurate servo track pitch is one of the key parameters of
perfomance and reliability of high capacity HDD.

      The extended line from "Linear Surface" crossing the pivot
center can realize high servo track pitch by using Rotary STW.

      Furthermore, it is very difficult to control the roughness and
dimension of rounded surface tightly.  When this has linear surface,
the control is much easier than rounded one.  Therefore, the easy
control can get lower parts cost.