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Advantages of measuring surface roughness with white light interferometry

Bruker Nano Surfaces and Metrology
25 Jun 2023

The concept of measuring surface roughness originated nearly a century ago as a means to prevent uncertainty and disputes between manufacturers and buyers. Now, it has become a common identifier used throughout industry for validating manufacturing processes, confirming adherence to both internal and regulatory specifications, and guaranteeing quality and performance of end products. In this application note, Bruker Nano discusses the advantages of using mean roughness measurements with white light interferometry (WLI) optical profilers.

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Bruker Nano Surfaces and Metrology

The ContourX-500 Optical Profilometer is the world’s most comprehensive automated benchtop system for fast, non-contact 3D surface metrology. The gage-capable ContourX-500 boasts unmatched Z-axis resolution and accuracy, and is easily customized for the widest range of complex applications, from QA/QC metrology of precision machined surfaces and semiconductor processes to R&D characterization for ophthalmics and MEMS devices.

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ProfilometersProfilometers are instruments used to measure a surface's profile, in order to quantify etch depth, deposited film thickness, and surface roughness. They operate in either contact or non-contact modes and may use optical or stylus techniques to make the actual measurements.Light MicroscopyLight microscopes or optical microscopes are used to visualize microscale objects under magnification, including cells, clinical specimens and materials. Lab equipment for light microscopy includes confocal microscopes, fluorescence microscopes, zoom and stereo microscopes. Microscope slides and imaging reagents are available for visualizing samples, as well as various microscope stages and incubators for large or temperature-sensitive samples. Find the best light microscopes in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Atomic Force Microscopy / Scanning Tunneling MicroscopyAtomic force microscopes (AFM) and scanning tunneling microscopes (STM) are high-resolution forms of scanning probe microscope (SPM) used to generate topological information of a sample down to the atomic scale. Instruments can generate an image of the surface topology, manipulate objects and reveal information on localized properties such as Young’s modulus, conductivity, and magnetism. High-quality STM and AFM probes optimized for your application are available, as well as other SPM-based instruments such as scanning ion conductance microscopes (SICM) & near-field scanning optical microscopes (NSOM). Find the best AFM and STM equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Surface Analysis

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Advantages of measuring surface roughness with white light interferometry