Abrading – Combined tool – Internal
Reexamination Certificate
2005-05-03
2005-05-03
Hendrickson, Stuart (Department: 1754)
Abrading
Combined tool
Internal
C423S275000, C423S446000, C117S929000, C428S408000
Reexamination Certificate
active
06887144
ABSTRACT:
An element-doped diamond crystal is disclosed herein. The crystal includes at least one dopant element which has a greater concentration toward or near an outermost surface of the crystal than in the center of the crystal. The concentration of the dopant element is at a local minimum at least about 5 micrometers below the surface. The concentration-profile of the dopant element for these diamond crystals causes an expansion of the diamond lattice, thereby generating tangential compressive stresses at the surface of the diamond crystal. These stresses beneficially increase the compressive fracture strength of the diamond.
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European Search Report.
Anthony Thomas Richard
D'Evelyn Mark Philip
Long Christopher Allen
Meng Yue
Park Dong-Sil
Diamond Innovations, Inc.
Hendrickson Stuart
Pepper Hamilton LLP
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