Browse Prior Art Database

Glass Disk Substrate Toughening and Annealing Mandrel

IP.com Disclosure Number: IPCOM000117261D
Original Publication Date: 1996-Jan-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Jacobson, NE: AUTHOR [+2]

Abstract

An elevated temperature corrosion resistant low mass annealing mandrel is disclosed.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Glass Disk Substrate Toughening and Annealing Mandrel

      An elevated temperature corrosion resistant low mass annealing
mandrel is disclosed.

      The anneal mandrel was designed to meet several requirements.
The first requirement was to maintain integrity at  500 sup o C.
Using Inconel* meets this requirement.  The second requirement was to
resist oxidation when dipped in potassium nitrate.  This is what the
Inconel material was developed for.  The third requirement was to
have a very low mass design that would not cause hot or cold spots on
the glass disks.  This is necessary to eliminate the warping or
cracking that is associated with temperature gradients in glass.
This was achieved by constructing the mandrel of .006 inch thick
sheet stock and bending it in a manner that adds strength (Figure).
  *  Trademark of Inco Alloys International, Inc.