DIN standard for the determination of the tip radius and the probing force of stylus instruments developed
In microsystems metallic components are increasingly being replaced by those from low-cost polymers. For the thickness measurement of polymers, there is now the DIN standard 32567 available, which describes both, optical and tactile surface measuring methods for the precise measurement of the thickness of polymer layers.
The standard describes methods by which both, the contact force and the tip radius of stylus instruments can be measured, a basic condition for non-destructive precision tactile profile measurements.
From motion sensor to smartphones - many everyday products increasingly contain parts which are made of polymer materials. The desired operation of these components depends not only on the dimensions, often also on the mechanical properties of these materials.
The dimensions can be measured optically or tactilely. However, in the thickness measurement of transparent materials with optical measuring methods, but also in the stylus measurement of coatings on hard substrates systematic deviations of the measured thickness are observed. In tactile methods, the main influencing factors are the probing force and the tip radius.
With viscous materials whose mechanical properties are time-dependent, also different scanning speeds affect the level of systematic deviations. PTB has therefore, in cooperation with other European national metrology institutes, developed a method for correcting these systematic errors, which has been standardized in DIN 32567. In the standard, the main influencing factors are shown for tactile and optical measurements and methods for the estimation, correction and reduction of systematic errors are described.
Contact at PTB
Dr. Uwe Brand, Working Group 5.11 Hardness and Tactile Probing Methods, Telefon: 0531-592 5111, E-Mail: firstname.lastname@example.org
• Brand, U.; Beckert, E.; Beutler, A.; Dai, G.; Stelzer, C.; Hertwig, A.; Klapetek, P.; Koglin, J.; Thelen, R. and Tutsch, R.: Comparison of optical and tactile layer thickness measurements of polymers and metals on silicon or SiO2. Meas. Sci. Technol. 22 (2011) 094021 (14pp)
• DIN 32567 Fertigungsmittel für Mikrosysteme — Ermittlung von Materialeinflüssen auf die Messunsicherheit in der optischen und taktilen dimensionellen Messtechnik. Teile 1 – 5
• Li, Z., Brand, U. und Ahbe, T.: Step height measurement of microscale thermoplastic polymer specimens using contact stylus profilometry. Prec. Eng. 45, 110–117 (2016)
Imke Frischmuth | Physikalisch-Technische Bundesanstalt (PTB)
Getting closer to porous, light-responsive materials
26.07.2017 | Kyoto University
25.07.2017 | Vanderbilt University
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
26.07.2017 | Physics and Astronomy
26.07.2017 | Life Sciences
26.07.2017 | Earth Sciences