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PCA 100R Robot-Controlled
Video-Based Contact Angle Meter
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Description:
Contact angle measuring device for the automatic measurement of
the wetting behavior of solids (e.g. wafers or glass substrates
for flat panel displays) under clean-room conditions of any
substrate size, as well as for series tests and systematic
analysis. The PCA 100R enables the reduction of subjective
factors and time involved for contact angle measurements in
quality control and production inspection. The instrument is
available as a portable, hand-held system or integrable in a
process automation with different kind of robot systems.
Typical fields
of application:
For the
software-controlled measurement and analysis of
- the static
and dynamic contact angle according to the Sessile Drop
method
- the wetting
behavior on solid surfaces
- the surface
free energy of solids and their components
- the surface
tension out of the analysis of the drop shape
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Equipment:
The PCA 100R consists of
the basic instrument with the following technical equipment:
- Measuring head with
integrated optics, illumination and multiple dosing unit
- high-performance,
telecentric lens with high light transmitting capacity and
integrated aperture
- Video measuring
system with high-resolution CCD-camera
- High-performance
video digitizing board (frame grabber) for the PC
- Illumination with
continuously adjustable intensity for a homogeneous back lighting
- Control and measuring
electronics for selection and positioning of the dosing needles
- Power supply with
automatic voltage adjustment
Features of
performance:
The 32-bit software SPCA
100 developed for Windows XP/2000/NT offers by various expansion steps:
- Control of the needle
selection and the position in Z-direction, the illumination, and the
electronic dosing system
- Static and dynamic
contact angle measurement according to the Sessile Drop method
- Calculation of
surface and interfacial tensions from the contour of a pendant or a
sessile drop
- Calculation of the
surface free energy of solids and their components (e.g. dispersion,
polar and hydrogen bond force contribution, acid and base portions
respectively) according to the theories of Wu, Zisman, Owens-Wendt,
Extended Fowkes, Schultz 1 + 2, Fowkes and van Oss & Good
- Statistics and
measurement error analysis
Technical Data:
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Range
of contact angle measurement |
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0 …
180° ; ± 0.3° measuring accuracy of the video system |
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Range
of surface and interfacial tension |
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1·10-²
… 2·10³ mN/m; resolution: min. ± 0.05 mN/m |
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Optics |
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High-performance
telecentric lens with high light transmitting and integrated
aperture
CCD-camera with a resolution of max. 752 x 582 pixels
Field of view (FOV): 6.4 x 4.8 mm
Optical distortion: < 0.4 % |
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Video
system |
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High-performance
image processing system with 132 MBytes/s data transfer rate
(compatible to European standard CCIR and US standard RS-170)
Up to 50 images/s digitizing speed |
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Measuring
methods |
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Sessile
Drop method |
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Size
of device (L x W x H) |
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260 x
110 x 205 mm |
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Weight |
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8 kg |
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Power
supply |
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100 …
240 VAC; 50 … 60 Hz; 55 VA |
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Variants |
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- PCA 100R/x for
the use with robot technology
- PCA 100M/x as
portable, hand-held instrument
- /2 with a
multiple dosing system for 2 test liquids
- /4 with a
multiple dosing system for 4 test liquids
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Supplementary
units and accessories |
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Reservoirs
for test liquids, optical contact angle and surface tension
standards, dosing needles, syringes, complete PC systems |
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