Browse Prior Art Database

Method of Sharpening Diamond Tips And Knives

IP.com Disclosure Number: IPCOM000119472D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 53K

Publishing Venue

IBM

Related People

Cuomo, JJ: AUTHOR [+4]

Abstract

Disclosed is a method of sharpening diamond tips and knives. Diamond knives are preferred by surgeons since they can be much sharper than steel, and since the diamond surface is hydrophobic and the cut tissue does not "stick" to the knife surface, drag along, and tear. These knife blades are very expensive, however, because they are made from single crystal diamond and polished to a fine edge in a very long and tedious grinding and polishing operation. The diamond must be massively supported, and the grinding and polishing takes an exceedingly long time. The parts can only be made a few at a time on the polishing machine.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 73% of the total text.

Method of Sharpening Diamond Tips And Knives

      Disclosed is a method of sharpening diamond tips and knives.
      Diamond knives are preferred by surgeons since they can be much
sharper than steel, and since the diamond surface is hydrophobic and
the cut tissue does not "stick" to the knife surface, drag along, and
tear.  These knife blades are very expensive, however, because they
are made from single crystal diamond and polished to a fine edge in a
very long and tedious grinding and polishing operation.  The diamond
must be massively supported, and the grinding and polishing takes an
exceedingly long time.  The parts can only be made a few at a time on
the polishing machine.

      There has been much recent progress made in coating fine grain
polycrystalline diamond films on silicon and metals.  Plasma
deposition  offers a potentially inexpensive way to coat metal knives
with 1 to 10 micron thick coatings of diamond.  However, sharp knife
edges would become rounded with a radius of the coating thickness.

      Disclosed is a method of sharpening such knives which could be
inexpensive, since no massive tooling is needed, and since thousands
of knives could be sharpened in one batch.  The fact that sputtering
of materials by heavy ions is fastest if the ions impinge on the
surface at an angle to the perpendicular issued.  A rounded edge of
diamond material 1 sputtered with ions 2 impinging parallel to the
flat of the metal knife 3 will assume...