Measuring and testing – Surface and cutting edge testing – Roughness
Reexamination Certificate
2005-03-15
2005-03-15
Williams, Hezron (Department: 2856)
Measuring and testing
Surface and cutting edge testing
Roughness
C073S104000, C250S307000, C250S309000, C250S310000, C250S311000, C356S239200, C356S601000
Reexamination Certificate
active
06865927
ABSTRACT:
A micro-object having a desired sharp point or edge may be optically tested during fabrication. This is accomplished by applying a known force to the workpiece against an optically opaque layer disposed on a transparent substrate, passing light down the workpiece toward the opaque layer, and determining whether the shaped portion of the workpiece has sufficiently penetrated the opaque layer so that light passed through the workpiece can be detected on the remote side of the transparent substrate. If the light is not detected, the shaped portion of the workpiece is considered to be insufficiently sharp, and the workpiece can be subjected to further shaping operations. In another arrangement, after the force is applied to cause penetration of the opaque layer by the shaped portion of the workpiece, the substrate and the workpiece are moved laterally with respect to one another so as to form a scratch on the opaque layer. The workpiece can be removed from the vicinity of the opaque layer and the amount of light transmitted through the scratch can be measured. If the amount of light is sufficient, the shaped portion of the workpiece is considered to be sufficiently sharp.
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General Nanotechnology LLC
Rogers David A.
Townsend and Townsend / and Crew LLP
Williams Hezron
LandOfFree
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