Method of producing CVD diamond coated scribing wheels
AssigneeFord Global Technologies, LLC
InventorsChing-Hsong Wu, Timothy J. Potter, Michael Alan Tamor, Richard Lawrence Allor
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Abstract
A method for providing a diamond film on a scribing wheel useful for scribing glassy materials in order to increase its wear resistance. The method comprises sequential steps which include pre-treating the surface of the scribing wheel and thereafter depositing the diamond film on the pretreated scribing wheel by a chemical vapor deposition process.
Claims15
A method for producing a film of polycrystalline diamond by chemical vapor deposition on a scribing wheel having a scribing edge, which method comprises the steps of:
- (a) providing a scribing wheel suitable to scribe silicon, ceramic, or class materials;
- (b) exposing said scribing wheel to liquid cleaner and subsequently organic solvent;
- (c) exposing said scribing wheel to a 5-30% by weight hydrogen peroxide in water solution;
- (d) exposing said scribing wheel to an aqueous reducing solution consisting of compounds selected from the group consisting of:
- (i) KOH;
- (ii) a mixture of KOH and K.sub.3 Fe(CN).sub.6 ;
- (iii) NaOH;
- and (iv) a mixture of NaOH and K.sub.3 Fe(CN).sub.6 ;
- and
- (e) depositing a film of polycrystalline diamond by a chemical vapor deposition process onto at least the scribing edge of said scribing wheel,
- wherein steps (c) and (d) are carried out in alternate order.
A method of producing a film of polycrystalline diamond by a chemical vapor deposition on a scribing wheel having a scribing edge, which method comprises the steps of:
- (a) providing a scribing wheel of cobalt cemented tungsten carbide suitable to scribe a silicon, ceramic, or glass material;
- (b) exposing said scribing wheel to liquid cleaner and subsequently organic solvent;
- (c) exposing said scribing wheel to a 5-30% by weight hydrogen peroxide in water solution for a time between about 1 and 60minutes at a temperature of between about 25.degree. and 50.degree. C.;
- (d) exposing said scribing wheel to an aqueous reducing solution consisting of compounds selected from the group consisting of:
- (i) KOH;
- (ii) a mixture of KOH and K.sub.3 Fe(CN).sub.6 ;
- (iii) NaOH;
- and (iv) a mixture of NaOH and K.sub.3 Fe(CN).sub.6 for a time between about 1 and 30 minutes at a temperature of between about 25.degree. and 50.degree. C.;
- and
- (e) depositing a film of diamond in a thickness between about 0.5 and 10 .mu.m by a chemical vapor deposition process onto at least the scribing edge of said scribing wheel,
- where said steps (c) and (d) are carried out in alternate order.
Dependencies are inferred from the claim text.