Component testing system vacuum ring and test plate...

Details Component testing system vacuum ring and test plate... Component testing system vacuum ring and test plate...

2005-06-14

2005-06-14

Tang, Minh N. (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

C324S755090

Reexamination Certificate

active

06906508

ABSTRACT:
A vacuum ring on a component testing system includes a metallic base material defining a vacuum-communicating passageway. A ceramic layer on the base material, preferably 20-100 micrometers thick and formed by a micro-arc oxidation process resulting in molecular adhesion, improves abrasion resistance and makes the vacuum ring more arc-over proof. A test plate for holding DUTs includes such a ceramic layer that provides better wear while enabling use of the base as a guard layer during testing. Another aspect of the invention concerns a vacuum ring having an eject hole pattern for discharging compressed gas toward DUTs in order to eject DUTs from a test plate. The eject hole pattern includes a plurality of closely spaced apart holes, each measuring less than the size that would be large enough to receive a DUT having the predetermined minimum cross sectional area.

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