In the fields of semiconductor manufacturing, ultra-precision machining and high-end metrology, flatness is the cornerstone that determines the success or failure of a process. However, environmental vibration can directly damage the horizontal reference of the equipment, making it impossible to achieve the nano-level precision target. As a professionalPrecision vibration isolation table manufacturerUnicon Technology Co., LTD. (Yiying Technology) is well aware that merely isolating vibration is far from enough. Ensuring the nano-level flatness and stability of the countertop itself is the core. This article will conduct an in-depth analysis of this key technology.
A harsh fact is that even a platform with an initial flatness of the nanometer level will undergo dynamic deformation of tens of nanometers under ground micro-vibrations of 1-2Hz. Outstanding precision vibration isolation table manufacturers will incorporate active vibration isolation technology into their designs. For example, the HERZ AVI series adopts piezoelectric acceleration sensors within the controller to convert the vibration pressure signal into an electrical signal and drive the piezoelectric transducer to generate a reverse force to counteract the incoming vibration in real time. This process ensures that the platform remains in a nearly ideal planar state at all times.
Professional precision vibration isolation table manufacturers will adopt a combined solution of active (1-200Hz) and passive (200Hz). Data shows that when the frequency exceeds 10Hz, the transmission rate can be lower than -35dB (that is, the vibration energy decays to approximately 1.8% of the original value). This design can not only eliminate the low-frequency foundation swing that damages the flatness, but also filter out the high-frequency air noise.
Environmental vibrations come from multiple directions, both horizontally and vertically. The advanced system simultaneously monitors and suppresses vibrations of six degrees of freedom through an internal feedback loop. This avoids the occurrence of mechanical resonance, prevents vibrations in a certain direction from being amplified, and thus comprehensively protects the flatness of the platform.
The products of high-quality precision vibration isolation table manufacturers (such as the UT-1000A series) are equipped with oscilloscope display interfaces, allowing real-time viewing of the vibration levels of each sensing part. Meanwhile, the automatic height and level adjustment functions can cope with the shift of the load center of gravity, ensuring that the platform is always in an ideal working posture. For instance, the FEI Titan TEM (weighing 3,500 kilograms) can achieve a stable nanoscale imaging environment supported by only four shock-absorbing modules.
When choosing a precision vibration isolation table manufacturer, it is recommended to examine the following three empirical studies:
Case study: Does it support high-load devices such as SEM, TEM, and EBL, and are there any successful installation cases?
Empirical parameters: Are the static flexibility (such as approximately 1.75μm/N in the vertical direction) and system noise (below 50nG/√Hz) clearly marked?
Service Verification: Does on-site investigation and customized Integration be provided? For instance, the UT-1000A platform adopts an ultra-thin modular design and can be installed at the bottom of most electron microscopes without the need for dedicated lifting equipment.
For equipment such as scanning electron microscopes (SEM) and focused ion beams (FIB), it is recommended to choose modular base-type vibration isolation tables, such as the AVI-600 or UT-1000A series. They are specially designed for large instruments, have expandable load-bearing capacity, and do not change the original outline of the microscope during installation. For desktop devices such as atomic force microscopes (AFM) and white light interferometers, the all-in-one TS series is more suitable. No matter what kind of demand it is, a reliable precision vibration isolation table manufacturer should provide a full-process standardized service from sample testing, selection to commissioning and training.
Achieving nano-level flatness is not simply about purchasing a heavy granite countertop. It needs to rely on the active vibration isolation technology, six-degree-of-freedom spatial compensation and real-time monitoring system of the precision vibration isolation table manufacturer. Unicon Technology Co., LTD. (Yiying Technology) has been deeply engaged in the field of thin film measurement and vibration reduction for over a decade, dedicated to providing a solid and reliable "foundation" for every precision instrument.
About Us: Since its establishment, Unicon Technology Co., LTD. (Yiying Technology) has been dedicated to the field of precision film measurement and laboratory environment optimization. It is the general agent of Filmetrics film thickness gauges in China. We are committed to safeguarding your precision instruments with professional products and considerate services. Visit our official website to learn more about vibration damping systems and full-process solutions.
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