Research departments

Contact angle measurement


Contact angle measurement : Digidrop – MCAT Goniometer (GBX)

Photo_Angle de goutte


Contact :


Franck CHOLLET
TEMIS Sciences Building – Office N3-05
03 63 08 26 22 (Office)
franck.chollet@femto-st.fr

Location :

TEMIS cleanroom
Industrial box area





Principle :



The GBX Digidrop contact angle measurement system allows to simply evaluate the wettability of the surfaces, directly related to their surface energy. Its use allows to rapidly and quantitatively analyze the effect of a plasma treatment, the surface state of cleanliness, etc. without damaging the surface which is only in contact with a drop of liquid (water or other liquid).

Mouillabilité_Angle de goutte



The operation principle is quite simple: a drop is put on the substrate by means of a syringe and a mobile platform and the profile of this drop is monitored by the softawre which allows an automatic extraction of the contact angle using different algorithms.

Schéma_Angle de goutte



Technical characteristics :

o Static and dynamic contact angle measurement
o Measurement accuracy : +/-0.1° for reference drops
o Measurement range : 0 – 180°
o Surface energy range : 0.5 – 1000 mN/m
o Image analysis rate : 50/60 images/s per USB camera
o Zoom: x10
o Sample size: several mm to 100mm (wafer)
o Kinds of provided syringes : glass or plastic



Example of measurement :

Mesure_Angle de goutte

Contact angle measurement on a Si surface with native oxyde