Optics: measuring and testing – Angle measuring or angular axial alignment – Sides of angle or axes being aligned transverse to optical...
Patent
1997-03-04
1999-01-19
Font, Frank G.
Optics: measuring and testing
Angle measuring or angular axial alignment
Sides of angle or axes being aligned transverse to optical...
356138, 356154, 356399, 356375, G01B 100, G01B 1126, G01N 1302
Patent
active
058619461
ABSTRACT:
A system is provided for positioning a substrate having a surface required to be characterized with a contact angle measurement. The system includes a stage which supports the substrate and a dispenser assembly having a dispensing tip through which a liquid droplet having a preselected volume is dispensed onto the surface of the substrate. A first actuating mechanism moves the stage in response to first actuation signals and a second actuating mechanism which changes the vertical spacing between the dispensing tip and the surface of the substrate and dispenses the liquid droplet from the dispenser assembly in response to second actuation signals. A controller is connected to the actuating mechanisms and delivers the first and second actuation signals to the first and second actuating mechanisms, respectively, so as to place the liquid droplet at a predetermined location on the surface of the substrate for performing the contact angle measurement.
REFERENCES:
patent: 4050822 (1977-09-01), Grat
patent: 4688938 (1987-08-01), Demoulin et al.
patent: 5137352 (1992-08-01), Blitshteyn et al.
patent: 5268733 (1993-12-01), Wright et al.
patent: 5552341 (1996-09-01), Lee
Hudson David M.
Lee Yueh-Ju
Loder Richard A.
Tseng Wen-Chu
AST, Inc.
Font Frank G.
Vierra-Eisenberg Jason D.
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