Drop Shape Analyzer

DSA100W

Automatic wettability and adhesion analysis of wafers and other round samples

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The Wafer configuration of the DSA100 Drop Shape Analyzer is geared towards the automatic, standardized quality control of wafer surfaces and other round samples. The instrument precisely determines the homogeneity of the cleaning of a surface based on the contact angle. It also enables coatings to be characterized, for example by differences in wetting of exposed and unexposed photo varnish.

Applications

Characterization of the cleaning and coating homogeneity of wafers
Adhesion evaluation between wafer and coating
Wetting investigation of exposed and unexposed photo varnish
Ideal for analyzing other round samples, e.g. hard drives or brake disks

Measuring methods

Contact angle of a drop on a solid surface
Contact angles of two drops dosed in parallel
Automated position-dependent contact angle measurement and evaluation
Contact angle using a gas bubble beneath a solid surface in a liquid
Surface free energy of a solid using contact angle data
Surface tension using the curvature of a perfectly symmetrical drop on a circular sample pedestal
Roll-off behavior and advancing/receding contact angle of a drop on a tilted surface
Carrying out a measurement up to 20 consecutive times and displaying the results together
Remote control of ADVANCE for integration in custom-designed, complex automations
Measuring the recently receded contact angle to characterize dewetting behavior

Measuring results

Static contact angle
Advancing and receding contact angle
Contact angle using a bubble in a liquid
Surface free energy (SFE) according to the following models: Owens-Wendt-Rabel-Kaelble (OWRK), Fowkes, Extended Fowkes, Van Oss & Good (Acid-Base), Schultz, Wu, Zisman, Equation of State
Position-dependent contact angle and SFE
Temperature

Fast and automatic measurement at any position

The heart of the DSA100W is a software-controlled setup of a round rotating sample table mounted on a horizontal axis. Wafers are kept safely in position thanks to a vacuum connection. With this arrangement, every position on the wafer can be accessed quickly, automatically and accurately for measuring the contact angle.

The dosing unit produces drops with precisely adjusted volume, which guarantees exactly reproducible measuring conditions. The gentle depositing of the drop and our dynamically controlled dosing system prevent measurement deviations caused by unintentional pre-wetting.

Software-controlled analysis of the whole sample

The ADVANCE software controls the measurement automatically based on standardized measuring procedures. In doing so, positions, which have been defined and stored in advance, are approached and measured one after the other. This ensures a fast and completely standardized measuring procedure with high sample throughput.

Reliable drop shape analysis thanks to high imaging quality

The DSA100W features a high-resolution camera and a quality zoom lens for accurate display of the drop with optimum size. The high image quality that this achieves leads to a precisely measured contact angle. Combined with the intelligent image evaluation algorithm of the ADVANCE software, drop shape analysis with the instrument provides exact results.

OPTIONAL

Liquid Needle dosing

Surface free energy in seconds

With the Liquid Needle, the contact angle measurement technology is perfectly prepared for quality assurance as well as R&D. Learn more about the ideas that enable the Liquid Needle to combine speed with scientific excellence.

Dosing automation at the highest level

Equip your instrument with the optional Dosing Hub, our flexible positioning and changing system for up to three combinable dosing units. Together with software-controlled dosing solutions, the system performs automatic and fast surface free energy measurements with up to four liquids, for example. The Dosing Hub also integrates temperature-controlled dosing units and other special solutions.

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Intuitive software with a workflow-oriented user interface
Swift and repeatable analyses thanks to measurement templates and powerful automation functions
Superior algorithms for image analyses provide for precise results even with difficult images
A wide range of evaluation methods makes ADVANCE a reliable scientific tool