Patent ID: 11897087
Assignee: FRAUNHOFER USA
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A diamond polishing apparatus comprising:
a holder comprising a diamond-holding foot configured to temporarily secure a substrate, with an epitaxial diamond film grown on the substrate, the diamond film having a thickness less than 50 microns, said holder and said diamond-holding foot comprising a centerline axis;
a shaft upwardly extending from the holder;
a sealed, ball and socket joint coupling the shaft to the holder;
a substantially horizontally elongated arm including a receptacle within which is mounted the shaft, whereby gravity acting on the arm causes the holder to push toward an actuator-driven polishing lap;
and
an actuator-driven transmission causing the arm to move the holder in a radial sweeping motion between inner and outer portions of the lap during polishing, said actuator-driven transmission comprising,
a sweeping actuator;
a disk operably rotated by the sweeping actuator about a central axis;
an elongated rod pivotally coupled to the disk at a first pivot, said first pivot offset from the central axis; and
the arm moving back and forth by movement of the rod in an eccentrical motion to cause the sweeping motion of the shaft and the holder above the lap while the lap is rotated;

a platform operably rotating in response to the rod pivotally coupled thereto at a second pivot;
a linearly adjustable micrometer supporting a portion of the arm, said arm positioned above the platform; and
the arm held upon the platform only with gravity and the holder being held upon the lap only with the gravity.