Semiconductor manufacturing, optical inspection and coordinate measuring scenarios impose extremely stringent comprehensive requirements on equipment bases and moving machine beams. Beyond micron-level geometric accuracy and structural stability, components must not generate magnetic interference and should resist erosion by various chemical media in workshops. Although many metal structural parts are easy to machine, they are magnetically conductive and prone to electrochemical corrosion. Such traits can interfere with sensors, optical gratings, optical lenses and even detection signals of semiconductor wafers, making them unsuitable for precision inspection and semiconductor production lines. With the natural material properties of black granite and ultra-precision machining technology, ZHHIMG granite machine beams perfectly resolve the two major pain points of magnetic conduction and corrosion, serving as an ideal reference carrier for semiconductor and precision inspection equipment.
Common metal machine beams such as steel, cast iron and aluminum alloy are magnetically permeable. When equipment is equipped with high-precision magnetic sensors, optical detection modules or performing non-destructive wafer inspection, the magnetic field generated by metal components will alter the local magnetic environment, causing signal offset and reducing repeatability of inspection results. In processes including semiconductor wafer inspection, X-ray testing and AOI optical inspection, even slight magnetic disturbance may lead to misjudgment of component detection and directly lower product yield. The premium black granite adopted by ZHHIMG is a natural non-metallic material with no magnetism and no risk of magnetization. It will not create magnetic interference for optical elements, linear scales, laser interferometers or semiconductor wafers. The magnetic field environment remains stable during long continuous operation of the whole machine, ensuring pure detection signals and authentic, reliable measurement data.
Semiconductor workshops and precision inspection stations are frequently exposed to various cleaning agents, photolithography auxiliary chemicals, cutting fluids, condensed water vapor and other media. Long-term contact with such substances causes oxidation and pitting corrosion on metal components. Tiny pits formed by corrosion will damage the reference plane, accompanied by metal powder generation that contaminates wafers and optical lenses, and may even jam motion modules. Granite features stable chemical properties and good acid and alkali resistance, resisting erosion by common workshop chemicals. ZHHIMG granite machine beams undergo complete blank screening, stress relief aging and ultra-precision grinding. The dense stone contains very few internal pores, so liquids can hardly penetrate into the substrate. Even if chemicals splash onto the surface occasionally, they will not corrode or powder the base material. Combined with standard surface cleaning, the precision of reference surfaces can be maintained steadily for a long time, greatly lowering the risk of contaminants polluting semiconductor devices and optical assemblies.
Non-magnetism and corrosion resistance are only basic advantages. Semiconductor and precision inspection equipment also have strict requirements on the overall rigidity and precision retention of machine beams. Most semiconductor devices are fitted with high-speed linear motor platforms and optical scanning modules, which continuously generate micro-vibration during high-speed reciprocating motion. ZHHIMG granite machine beams have excellent damping capacity to rapidly absorb vibration generated by movement and suppress vibration transmission, ensuring stable motion posture during optical scanning and wafer inspection. Meanwhile, the material boasts an ultra-low thermal expansion coefficient, resulting in minimal dimensional deformation under controlled workshop environments and providing a consistent geometric benchmark for optical inspection and wafer measurement.
At the custom design stage, ZHHIMG can complete integrated structural design of machine beams according to the overall layout of semiconductor equipment and precision inspection instruments. Various interfaces such as T-slots, positioning pin holes, pipeline escape holes and air bearing mounting positions can be machined on demand. Finished machine beams are precisely ground in a constant-temperature, constant-humidity clean workshop, with full-range precision inspection carried out in compliance with metrology standards of multiple countries. All testing instruments can be traced to national metrology authorities, guaranteeing that the geometric tolerances of delivered products meet the strict requirements of semiconductor and metrology equipment. Whether for optical comparators, coordinate measuring machines, semiconductor wafer inspection equipment or perovskite thin-film testing platforms, granite machine beams can reliably carry the whole motion and optical system. 
Even though granite machine beams are non-magnetic and corrosion-resistant, routine maintenance is still required when used in semiconductor cleanrooms. Timely removal of surface dust and residual liquid medicine prevents stubborn stains from adhering for a long time and protects the ground reference surface. While the stone itself resists corrosion, hard particles may still scratch the precision reference surface and impair the performance of optical and inspection equipment.
Benefiting from the inherent non-magnetic and chemical corrosion-resistant properties, together with high rigidity, superior vibration damping performance and ultra-high machining accuracy, ZHHIMG granite machine beams avoid the drawbacks of traditional metal components such as magnetic interference and susceptibility to rust and corrosion. They are highly applicable to semiconductor production lines, precision metrology and optical inspection equipment, delivering stable and reliable benchmark support for high-end precision inspection and semiconductor machinery.
Post time: Sep-15-2026