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  5. DMo-WA series

DMo-WA series

DMo-WA series

DMo-502WA: manual droplet deposition, manual x-axis with manual rotation stage

DMo-WA series

DMo-702WASA: automatic droplet deposition, automatic x-axis with manual rotation stage on an external tilting stage

DMo-WA series

DMo-902WA: automatic droplet deposition, automatic x-axis with automatic rotation stage

DMo-WA series

DMo-902WA: automatic 360º rotation stage with automatic x-axis

DMo-WA series

Add-on module for measurements of roll-off speed and roll-off acceleration

DMo-WA series
DMo-WA series
DMo-WA series
DMo-WA series
DMo-WA series

Each model combines the following features

  • Fast image capturing system with standard 400 fps at 640x480 resolution USB3.0 CMOS camera, max. 1000fps at 640x200 resolution
  • Automatic single dispenser system
  • Diameter 335mm 360º rotation sample stage with a maximum load capacity of 0.4kgs
  • Stage travel distance: x-axis: 150mm, y-axis: fixed, z-axis: fixed
  • Focusing aid with displayed index graph and value and brightness adjustment to achieve perfect focus
  • Movie converter to convert data images to MPEG-1 or AVI movie format
  • Determination of contact angles, droplet volume, residual droplet volume, sessile drop volume, height, and radius of the sessile drop
  • Measured results are displayed in a spreadsheet for easy reference and comparison, and saved in csv format for easy export to and manipulation in MS Excel
  • User-specified analysis report function, providing measurement results and parameters
  • Droplet calibration standard for standard view, bearing one full circle for calibration and three droplet silhouettes of 5º, 60º, and 108º for periodic inspection of measurement accuracy

The following table describes the differences between the measuring process of each model

The following table describes the differences between the measuring process of each model
DMo
model
Positioning of first measurement Generation of droplet Deposition of droplet (control / recognition) Analysis of droplet Positioning of next measurement Full-scale continuous measurements
502WA
by rotary knob
▲ / ●
702WA
by command button
● / ●
902WA ● / ●

▲ manual ● automatic

  • Automatic recognition of drop deposition
  • Live image display and droplet volume monitoring
  • Movie converter
  • Automatic dispenser with a set of 5 glass syringes and 5 SUS needles for precise adjustment of droplet volume and quick refilling and replacement of liquid samples
  • Fine adjustable stage in x- and z-axis for exact positioning and gentle deposition of droplets without distortion
  • Adjustable level of the body and stage
  • Droplet calibration standard for standard view, bearing one full circle for calibration and three droplet silhouettes of 5º, 60º, and 108º for periodic inspection of measurement accuracy

Hardware

  • Tilting stage for measurements of roll-off angles, incl. FAMAS software add-in [Sliding method] (except 902)
  • Add-on module [Dynamic sliding method] for measurement of roll-off speed and roll-off acceleration. Only in combination with tilting stage package (except 902)
  • Multi manual dispenser holder
  • Multi automatic dispenser system
  • Large capacity pump dispenser, incl. a 50μl liquid container
  • Surface free energy kit
  • Pendant drop kit (for standard & wide view)
  • Droplet calibration standard (for wide 1 view)
  • Pendant drop kit (for standard & wide view)
  • Kit for captive-bubble-measurements
  • Pendant drop calibration standard (for standard view)
  • Pendant drop calibration standard (for wide 1 and wide 2 view)
  • Surface cleanliness and homogeneity after cleaning processes (typically for removal of organic contaminations)
  • Surface properties such as wettability and adhesion of modified surfaces and thin film coatings
  • Wetting and dewetting properties in immersion lithography processes using the sliding method with external tilting stage and/or using the extension/contraction method
  DMo-902WA DMo-702WA DMo-502WA
Camera system



USB3.0 CMOS camera with:
400fps at 640x480 pixels
500fps at 640x400 pixels
1000fps at 640x200 pixels
Optical system

focus: manual focus with 3 step manual zoom
field of view: 6.1x4.7mm, 11.1x8.2mm, 15.8x11.8mm ±6%
Measuring methods

contact angle: sessile drop (static & dynamic), advancing/receding, tilting1)
surface/interfacial tension: pendant drop (static & dynamic)
Analysis methods



contact angle: θ/2, tangent, curve fitting (ellipse, circle)
surface/interfacial tension: Young-Laplace, ds/de
surface free energy of solids: Owens-Wendt, Kaelble-Uy, Kitazaki-Hata, Wu, acid-base, Zisman
Measuring range

contact angle: 0.01 to 180°
surface/interfacial tension: 0.01 to 100mN/m
Resolution

contact angle: 0.01°
surface/interfacial tension: 0.01mN/m
Accuracy2)

contact angle: 0.2°
surface/interfacial tension: 0.2mN/m
Maximum sample surface area and height (Dia.xH) max. 300x35mm

Maximum sample weight 400g
Sample stage operation:
X-axis
Y-axis
Z-axis
Rotation axis

150mm (aut.)
---
---
360° (aut.)

150mm (aut.)
---
---
360° (man.)

150mm (man.)
---
---
360° (man.)
Dispenser operation:
Z-axis
Droplet deposition
Droplet generation
Dispensing resolution

35mm
automatic
automatic
0.1μl

35mm
automatic
automatic
0.1μl

35mm
manual
automatic
0.1μl
Measuring temperature ambient
Dimensions (WxDxH) of:
Main instrument
Control box

375x684x432mm
290x240x100mm

375x684x432mm
260x200x70mm
Approximately weight of:
Main instrument
Control box

12.5kg
4.3kg

11.0kg
4.3kg

10.0kg
1.6kg
Electric power:
Voltage
Frequency
Power consumption

AC100-240V
50/60 Hz
115W 120VA

AC100-240V
50/60 Hz
25W 48VA
Operating environment

temperature: +10 to +35℃, humidity: 30-80%RH (non-condensing)
positioned away from sources of electrical noise and vibration

1) An optional external tilting stage is required
2) Accuracy is the repeatability in terms of standard deviation based on the manufacturer’s calibration standard

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