Measurement of the dynamic mechanical properties of viscous materials

DIN standard for the determination of the tip radius and the probing force of stylus instruments developed

07-Jun-2016 - Germany

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.

PTB

Reference cantilever made of silicon for determining the probing force of contact stylus instruments. From the bending of the beam at the end mark, the contact force is determined.

Original publication

Other news from the department research and development

These products might interest you

Spinsolve Benchtop NMR

Spinsolve Benchtop NMR by Magritek

Spinsolve Benchtop NMR

Spinsolve is a revolutionary multinuclear NMR spectrometer that provides the best performance

Eclipse

Eclipse by Wyatt Technology

FFF-MALS system for separation and characterization of macromolecules and nanoparticles

The latest and most innovative FFF system designed for highest usability, robustness and data quality

HYPERION II

HYPERION II by Bruker

FT-IR and IR laser imaging (QCL) microscope for research and development

Analyze macroscopic samples with microscopic resolution (5 µm) in seconds

FT-IR microscopes
Loading...

Most read news

More news from our other portals

So close that even
molecules turn red...