Vibrometry

Testing the quality of semiconductors and solar technology components
Do you work with innovative technologies and materials in the solar, semiconductor and electronics industries? Do you develop, make or test printed circuits, PCBs, electronic modules, electronic assemblies or PV modules? Are you striving to create smaller, more powerful and extremely reliable structural elements, components or modules? Yes? Then you need powerful measurement and testing methods for developing and ensuring the quality of your products and components and for monitoring them in the long term.
Components’ dynamic behaviour in particular, is a key quality indicator and allows the user to draw conclusions as to both the reliability and the service life of their electronic or photovoltaic assemblies and products. In this situation, Polytec’s optical vibration sensors with laser vibrometers are indispensable tools for you – whether you’re carrying out dynamic tests in research, design and industrial testing, or monitoring processes such as the bond process when manufacturing power electronics.
Develop and test haptic displays
With the success of smartphones, touchscreen technology has become mainstream. Now, innovative user interface concepts use haptic or tactile feedback to give touchscreens a unique feel. Such vibrations or force feedback can make operation significantly easier and intuitive by, for instance, letting the user know through touch which virtual button is under their finger or whether it was successfully activated.
Laser vibrometers are vital to the continuing research, development and quality control of haptic feedback devices. 3D motion data precisely describes the in-plane and out-of-plane vector components for a full characterization and visualization of the haptic signature. In production testing, vibrometers from Polytec assure the desired feel with laser precision.

Related products

PSV-500 Scanning Vibrometer
The PSV Scanning Vibrometer measures vibrations on an entire surface in a non-contact and laser precise way. This flexible measurement platform allows researchers and developers to master the most challenging vibration measurement tasks with ease. Upgrade or...

PSV-500-3D Scanning Vibrometer
PSV-3D Scanning Vibrometers measure 3D dynamics in research and product development in a reliable and precise way. The deflection shapes and Eigen modes detected help you with everything from NVH, acoustic and structurally dynamic issues to ultrasonic...
Assessing the quality of thick-wire bonds
Thick-wire aluminum bonds, which are widely used in the automotive industry to bond power semiconductors, need to be extremely reliable. Laser vibrometers allow you to examine the bond process in situ and are therefore critical in helping you to clarify any quality defects.
Microelectronic assemblies – where the transmission of high output levels and currents is paramount (for example power modules in the automotive industry,) – are widely processed for electric bonding purposes using so-called thick-wire bonds. The electrical contacts are made using the ultrasonic friction welding process with aluminum wires with diameters ranging from 100 to 600 μm. Resonation of the bond pads, which could well lead to a lower-quality bond connection with questionable long-term reliability, is undesirable in this regard.
Fiber-optic vibrometry is a great way of both analyzing the pads’ vibrations with maximum precision and assessing the bond quality during the bond process. Laser vibrometry combines the advantages offered by a non-contact measurement solution that doesn’t influence the sample’s vibration behavior with the benefits of a sufficiently high level of temporal and spatial resolution.
Documents
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CLV-2534 Compact Laser Vibrometer
The flexible vibration-measuring device with an integrated camera and a compact design is ideal for quality assurance and research. Additional microscope lenses expand the range of possible tasks that you can complete to include very small samples.

OFV-5000 Modular Vibrometer
Modular vibrometer systems offer both outstanding signal quality and maximum flexibility. They are made up of a sensor head and a controller that you can combine as required. You can therefore flexibly adapt your vibration measurement system to suit your...
Micro and nanotechnology
Precise, reliable and fast measuring technology for characterizing and monitoring the quality of devices is decisive to in developing and producing microsystems. This is all the more important since microsensors are increasingly taking over safety-related tasks too – placing high demands on reliability and functional safety. A robust design and high production precision play a key role in this regard.
For more information, visit the application area microtechnology and nanotechnology.

Contactlessly characterizing solar modules
Throughout their service life, solar cells are exposed to an extremely wide range of weather conditions that not only cause thermal stresses, but varying dynamic stresses too. This is precisely why developers have a major goal: namely, to deliver the greatest possible level of stability and the longest possible operating time by means of design optimization.
Material modeling and simulations help you to illustrate stress scenarios and processes for a photovoltaic module’s materials and components in a model – and, based on this, to develop and improve them in an appropriate way. You can predict both the service life and the mechanical properties for a newly developed material with a very high level of accuracy by combining various simulation methods with experimental investigations.
To get the material and structural parameters needed to do exactly that – take stiffness or damping, for example – all you have to do is measure the solar module’s dynamic properties. Scanning vibrometry, which allows you to easily determine resonance frequencies and deflection shapes, is ideally suited for this precise purpose.
Documents

Related products

PSV-500 Scanning Vibrometer
The PSV Scanning Vibrometer measures vibrations on an entire surface in a non-contact and laser precise way. This flexible measurement platform allows researchers and developers to master the most challenging vibration measurement tasks with ease. Upgrade or...
Checking the reliability of electronic and mechatronic systems
When it comes to traffic safety and competitiveness, the reliability of electronic components is a key issue in the automotive and aviation industries. Scanning vibrometry has proven to be a key measurement method for mechanical tests in this regard, so users can characterize the dynamic behaviour of both printed circuit boards and mechatronic systems. Accelerometers cannot be usefully applied to small structures. Laser measurements, however, enable performance of precise modal analyses across a wide frequency range from just a few Hz to 50 kHz. When used in conjunction with FEM and continuous tests, laser measurements provide an efficient way of optimizing the printed circuit board design and layout with a view to avoiding undesirable vibration stresses that can shorten the service life.
But that’s not all. Non-contact vibration measurement with laser vibrometers is helpful even for larger power electronic systems, such as converter modules for high-voltage direct current transmission which are used, for example, in offshore wind farms.. Their converter function can cause the converter structure to mechanically vibrate in an undesirable way, potentially overstressing it. You can make specific design improvements by using 3D scanning vibrometry to determine the natural frequencies and deflection shapes, and then you can practically check whether your improvements have been successful by repeating the vibration tests.
Documents

Microstructure characterization
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Change cookie settingsRelated products

PSV-500 Scanning Vibrometer
The PSV Scanning Vibrometer measures vibrations on an entire surface in a non-contact and laser precise way. This flexible measurement platform allows researchers and developers to master the most challenging vibration measurement tasks with ease. Upgrade or...

PSV-500-3D Scanning Vibrometer
PSV-3D Scanning Vibrometers measure 3D dynamics in research and product development in a reliable and precise way. The deflection shapes and Eigen modes detected help you with everything from NVH, acoustic and structurally dynamic issues to ultrasonic...