Attension® Theta Optical Tensiometers
Attension® Theta Flow Wafer Stage
The Attension® Theta Flow Wafer Stage is a highly accurate, automated instrument designed to simplify repetitive contact angle measurements on silicon wafers. Capable of collecting wettability measurements across the entire surface areas of 2″, 3”, 4”, 5”, 6”, 8”, and 12″ wafers, the Theta Wafer system ensures repeatable analysis for semiconductor research and manufacturing facilities.
High-Precision Rotational Control
360° rotation with 0.005° resolution and 0.2° precision for accurate surface mapping
Multi-Dispensing Support
Compatible with four dispensers for automated drop placement, enabling batch measurements and surface energy analysis
Silicon Wafer Optimization
Supports automated contact angle measurements on up to 12″ silicon wafers
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High Precision Rotational Stage for Silicon Wafers
The Theta Wafer Stage features a software-controlled rotational stage designed for precise, automated contact angle mapping. With a full 0–360° rotation range, 0.005° resolution, and 0.2° precision, the stage is ideal for systematic measurements across large wafers, ensuring repeatability and spatial accuracy in surface characterization.
supported measurements
All measurement methods listed are included with OneAttension at no additional cost.
Sessile Drop / Static Contact Angle
Places a drop of liquid and captures images of the droplet sitting stationary on the surface
Applications:
Industrial cleaning assessments, printing, petroleum, medical devices
Sessile Drop: Batch Mode
Carries out static contact angle measurements at various locations on the same sample
Applications:
Surface cleanliness, paint adhesion, coatings, other surface properties
Dynamic Contact Angle with Needle-in Droplet
Measures advancing and receding contact angles as a droplet grows and shrinks on the surface
Applications:
Hydrophobic coatings, self-cleaning surfaces, surface heterogeneity characterization
Dynamic Contact Angle with Tilting
Assesses the advancing and receding angles and the resulting hysteresis using a tilting stage or tilting cradle
Applications:
Hydrophobic coatings, self-cleaning surfaces, surface heterogeneity characterization
Pendant Drop / Interfacial Tension
Measures the force between two immiscible liquids to evaluate how easily they mix or separate
Applications:
Enhanced oil recovery, pharmaceuticals, emulsions, surfactants
Meniscus Method / Surface Tension
Measures the cohesive force at a liquid’s surface to evaluate spreading, wetting, and formulation behavior
Applications:
Detergents, agrochemicals, paints, food science, pharmaceuticals
Pulsating Drop / Interfacial Viscoelasticity
Measures how interfacial layers respond to deformation by oscillating the droplet area to evaluate viscoelastic properties
Applications:
Emulsion stability, foam stability, surfactant performance, pharmaceutical formulations
Surface Free Energy
Evaluates how easily liquids spread or stick to a solid surface by measuring surface wettability
Applications:
Surface cleanliness, powder processing, adhesives, paints,
Attension® Theta Wafer
Product Features
Seamless Integration with OneAttension Software
The Theta Wafer Stage integrates directly with the OneAttension software, enabling fully automated control of both the rotational and motorized XYZ stages. With 360° rotational movement and precise XYZ positioning, users can easily set up and execute multi-location or batch measurements across the wafer surface. The intuitive software interface simplifies stage programming for consistent, repeatable contact angle data collection.
Four Disposable-Tip Dispensers
The Theta Wafer Stage supports four disposable-tip dispensers, which can either be filled with the same liquid to allow longer uninterrupted measurement sequences, or with four different liquids to automate surface free energy measurements.
Compatible with Up to 12-Inch Silicon Wafers
Engineered for flexibility, the Theta Wafer Stage supports silicon wafers from 2” to 12” in diameter, with a maximum sample weight of 500 g. This wide compatibility range allows researchers and engineers to perform standardized contact angle and surface free energy measurements across various wafer sizes used in semiconductor and electronics manufacturing.
Secure Wafer Positioning
The Theta Wafer Stage includes a wafer stage top equipped with guiding pins for precise alignment and positioning of silicon wafers. These alignment pins stabilize the wafer during rotation and measurement. For additional security, the stage features an integrated vacuum connector that can be connected to a vacuum line to hold the wafer firmly in place throughout the measurement process.
Attension® Theta Wafer
Product Accessories
High Pressure Chamber
The High Pressure Chamber is designed for wettability research within enhanced oil recovery and enables measurements at pressures up to 400 bars and temperatures up to 200°C.
Tilting Cradle
A software controlled tilting cradle. Used for studying dynamic contact angles. Tilting range from 0 to 90° and tilting resolution 0.1°.
Interfacial Rheology Module
Software controlled drop size pulsing for interfacial rheology measurement of viscoelastic properties of interfacial layers at liquid-air or liquid-liquid interfaces.
Picoliter Dispenser
Utilize automated picoliter-scale drop formation. Especially useful for inkjet applications and for measuring contact angle on very small sample areas.
Attension® Theta Wafer
Product Knowledgebase
Webinar
Interfacial dilatational rheology is a useful tool to investigate the properties of liquid…
Blog
Evaluating Medical Device Coatings with Picoliter Droplets
Coatings for invasive medical devices are critical in ensuring their safety, performance,…
White Paper
Surface and interfacial tensions of liquids significantly affect their wetting behavior an…