Patent ID: 6379777
Filing Date: 2002-04-30
Classification: C03B,Y10T

Abstract:
A die comprising:a pressing surface; a first protrusion having a substantially triangular cross section formed on said pressing surface; and a second protrusion formed on said pressing surface and having a length which is greater than a width thereof and a substantially trapezoidal cross section in planes extending through both length and width dimensions thereof; said first protrusion being provided to form a first groove on a workpiece, said first groove having a substantially V-shaped cross section to mount an optical part on the workpiece; and said second protrusion being provided to form a second groove on the workpiece, said second groove having a length which is greater than a width thereof and a substantially inverse-trapezoidal cross section in planes extending through both length and width dimensions thereof, for providing an alignment marking on the workpiece.