Molybdenum foil: a versatile material for high temperature and high precision
In the field of cutting-edge industry and scientific research, molybdenum foil, with its unique physical and chemical properties, has become an irreplaceable functional material in a number of key scenarios. This ultra-thin metal material, which is usually between 0.001 and 0.2mm thick, is expanding its application boundaries through continuous innovative processing technologies.
1. Precision film carrier for semiconductor manufacturing
In advanced process chip manufacturing, molybdenum foil is deposited into nanoscale film by magnetron sputtering process, which is used to construct gate and interconnection structure of MOSFET device. Compared with traditional aluminum, molybdenum film has a lower resistivity (5.34×10-8Ω·m) and can withstand the mechanical stress of chemical mechanical polishing (CMP) process. A more groundbreaking application appears in three-dimensional stacked chips, where 0.05mm thick molybdenum foil is used as a temporary bonding carrier to maintain dimensional stability at 400 ℃ and achieve accurate alignment and unbonding of multi-layer wafers.
2. The thermal management revolution of electronic devices
High temperature electronic devices such as 5G base station power amplifiers and electric vehicle modules are widely used molybdenum foil cooling solutions. The 3D micro-channel heat sink etched by 0.1mm thick molybdenum foil has a thermal conductivity of up to 138W/(m·K), which is 40% more efficient than the traditional copper-based heat sink at the same volume. A more cutting-edge application is in the field of flexible electronics - by chemical vapor deposition, 20μm molybdenum foil is combined with polyimide to create a flexible cooling substrate that can withstand bending at 300 ℃, providing thermal protection for devices such as foldable mobile phones.
3. The core medium of extreme environmental research
In synchrotron radiation light source experiment, 50μm molybdenum foil was processed into X-ray filter, and its K absorption edge (20keV) characteristic was used to achieve energy spectrum purification. In a controlled nuclear fusion device, 0.3mm molybdenum foil is used as the first wall protection material to withstand plasma shocks with transient thermal loads of up to 10MW/m2. In recent years, breakthrough studies have shown that after the surface of molybdenum foil is machined by femtosecond laser with submicron periodic structure, it can produce strong second harmonic effect, which provides a new platform for quantum optical experiments.
4. Vacuum equipment temperature skeleton
In the molecular beam epitaxy equipment, 0.08mm molybdenum foil was photoetched to form atomically flat sample carrier, and its thermal expansion coefficient (4.8×10⁻⁶/℃) was highly matched with GaAs and other semiconductor materials. A more subtle application is the ultra-high vacuum seal - molybdenum foil and Covar alloy are joined by diffusion welding to form a dynamic seal structure that can be maintained at a vacuum of 10⁻⁹Pa for more than ten years. This technology has been applied to the vacuum chamber construction of gravitational wave detectors.
5. Innovative substrates for new thermal barrier systems
In the thermal barrier coating system of aero-engine turbine blades, 50μm molybdenum foil is melted by selective laser to form a porous intermediate layer, which increases the bonding strength of yttrium stabilized zirconia coating by 3 times. In the field of reusable spacecraft, the composite thermal protection system formed by gradient sintering of molybdenum foil and carbon/carbon composite material can withstand more than 1000 transient thermal shocks at 1650℃ -room temperature, which is significantly better than traditional ceramic based coatings.
With the development of precision coating technology such as atomic layer deposition, molybdenum foil is evolving towards functional and structured direction. From nanoscale conductive pathways inside chips to thermal armor for deep space probes, this silver-gray metal sheet continues to push the limits of engineering materials, playing an increasingly important role in human exploration of the micro and macro worlds.
Mosten Alloy can produce molybdenum sheet, molybdenum block, molybdenum foil, molybdenum rod, molybdenum wire, molybdenum processing workpiece according to customer demand.
