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Browse Prior Art Database

Non Truing Blade Preparation for Thin Blades

IP.com Disclosure Number: IPCOM000123967D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 44K

Publishing Venue

IBM

Related People

Singh, M: AUTHOR

Abstract

In the thin film head manufacturing industry, grinding blades is required preparation before the blades can be used in the row-slicing process from wafers. Blade preparation means that: 1. The OD should be perfectly round (not CAM) so that the whole periphery of the blade is involved in cutting. 2. The OD has to be concentric to the axis of rotation of the shaft (Arbor). This way the blade will not be under hammer action during the cutting of the hard ceramic (AlTic).

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Non Truing Blade Preparation for Thin Blades

In the thin film head manufacturing industry, grinding
blades is required preparation before the blades can be used in the
row-slicing process from wafers.  Blade preparation means that:
  1.  The OD should be perfectly round (not CAM) so that the
      whole periphery of the blade is involved in cutting.
  2.  The OD has to be concentric to the axis of rotation of the
      shaft (Arbor).  This way the blade will not be under hammer
      action during the cutting of the hard ceramic (AlTic).

   These objectives are achieved by truing the blades with
the use of a cylindrical grinder after the blades are mounted onto
arbor.  This process for very thin blades (90 to 150mic.) is very
slow.  The process must be run at very slow speeds (linear) to avoid
bending or damage to the blade.  For an assembly of blades (three or
more), the process takes approximately 4 to 6 hours to prepare one
gang (blade assembly)

   The "Non Truing Blade Preparation Method for Thin Blades"
is an invention designed to avoid the use of the cylindrical
grinder.  This is a process to run the blades through a dressing
stone.  These stones are commonly used during slicing to keep the
blades' cutting edges sharp and clean.  For thin blades (90 to
150mic.), dressing through these stones removes the cam effect at a
much faster rate.  This allows both of the above listed objectives to
be achieved in one hour, as opposed to 4 to 6 hour...