PI copper plated film | the 'invisible backbone' of the flexible electronics era

Behind the million fold lossless folding of foldable smartphones, stable signal transmission of satellite antennas in extreme temperature differences of -180 ℃ to 200 ℃, and the ability of new energy vehicle battery management systems to withstand high temperatures of 150 ℃, there is a technology calledPI copper plated filmComposite materials are supporting the modern technological revolution in the form of an 'invisible backbone'. The PI copper plated film produced by Advanced Institute Technology, with an ultra-thin coating of 0.005mm-0.125mm created by vacuum sputtering technology, not only redefines the performance boundary of flexible electronic materials, but also triggers a material revolution in aerospace, 5G communication, new energy and other fields.

1、 Vacuum Sputtering: Material Reconstruction with Nanoscale Accuracy

The core breakthrough of PI copper plating film lies in the innovative application of vacuum sputtering technology. In a vacuum environment ranging from 10 ^ -3 Pa to 10 ^ -9 Pa, argon ions bombard pure copper targets at a high speed of tens of thousands of times per second, freeing copper atoms from lattice constraints and depositing them uniformly on the surface of PI thin films with nanometer level accuracy. Advanced Institute Technology optimizes the magnetic field gradient on the surface of the target material to 0.5T/cm through non-equilibrium magnetron sputtering technology, which increases the copper atom deposition rate by three times and controls the coating uniformity error within ± 5% - a data far exceeding the industry standard of ± 10%.

The empirical value of technological breakthroughs:

·The 5 μ m ultra-thin PI copper plated film purchased by a research institute in Lanzhou is used for flexible circuit substrates in high-energy physics detectors. The copper layer formed by vacuum sputtering has a bonding force of 1.5N/mm with the PI substrate, and no peeling phenomenon occurred after continuous operation for 1000 hours in a liquid nitrogen environment at -196 ℃.

·The modified PI copper plated film (MPI Cu) developed by the Advanced Institute reduces dielectric loss to 0.002 (in the 28GHz frequency band) by introducing a nanocrystalline structure. It has been applied to the LCP antenna substrate of Huawei 5G mobile phones, improving signal transmission efficiency by 18%.

2、 Performance overlay: from a single function to a system level solution

The disruptive nature of PI copper plating film lies in the system level integration of PI's high temperature resistance and insulation properties with copper's high conductivity and thermal conductivity. Advanced Institute Technology adopts a three-layer composite structure design: the bottom layer is a PI substrate with a temperature resistance of 300 ℃, the middle layer is a vacuum sputtered copper layer with a thickness of 5 μ m-25 μ m, and the surface layer can be coated with tin, silver or nickel alloy protective layer, forming a functional closed loop of "insulation conductivity protection".

Data support for multi scenario applications:

1. Aerospace field:

The reflector layer of the spaceborne antenna is made of 0.08mm thick PI copper plated film, which reduces the weight by 60% compared to traditional metal substrates. It maintains conductivity stability under 200 ℃ sunlight and -180 ℃ space low-temperature cycling, and has been applied to the communication system of the "Tiangong" space station.

The temperature sensor electrode of the steelmaking furnace works for a short period of time in an environment of 800 ℃, and the copper layer oxidation suppression technology increases the lifespan by three times compared to traditional copper foil.

2. In the field of new energy:

A certain battery management system adopts advanced technologyPI copper plated filmAs a collection circuit, it can withstand the high temperature and vibration environment of 150 ℃ in the engine compartment, and the resistance fluctuation is less than 2% after 100000 charge and discharge cycles.

After using PI copper plated film as the material for the terminal ear of a certain car battery, the internal resistance decreased by 15% and the fast charging efficiency increased by 8%.

3. In the field of consumer electronics:

The folding screen driver circuit of a certain brand of mobile phone adopts a 0.05mm thick PI copper plated film, achieving a resistance fluctuation of less than 3% after 100000 bending cycles and reducing the bending radius to 1.5mm.

3、 Customized production: the last mile from laboratory to industrialization

The "Material Gene Bank Flexible Production Line" model constructed by Advanced Institute Technology has broken through the specification limitations of traditional PI copper plated films. Its Shenzhen production base is equipped with a multi target co sputtering system, which can simultaneously deposit metal layers such as copper, tin, silver, etc. It supports customized thickness of 5 μ m-125 μ m as needed, with a minimum order quantity of only 100 square meters - a threshold 80% lower than the industry average.

Typical case of customized production:

A 0.125mm thick PI copper plated film customized by a research institute in Lanzhou for the High Current Heavy Ion Accelerator (HIAF) device, with surface resistance controlled at 0.1 Ω/sq by adjusting the grain orientation of the copper layer, meets the electromagnetic shielding requirements of superconducting magnets in low-temperature (-269 ℃) environments.

4、 Future Vision: The Lego Model of Materials Science

The evolution direction of PI copper plated film is extending from a single material to a modular platform. The "PI Graphene" composite film developed by Advanced Institute Technology has a thermal conductivity of over 200W/m · K and has been used for high-power LED heat dissipation substrates; The "PI carbon nanotube" conductive film enhances the electromagnetic shielding efficiency to 100dB (10GHz-30GHz frequency band), meeting the extreme shielding requirements of quantum computing devices.

This LEGO style combination of "basic material functional coatings" is reconstructing the material system of flexible electronics. According to market research firm Yole D é evelopment, the global PI copper plating film market is expected to reach $8.7 billion by 2028, with a compound annual growth rate of 21.3%. Advanced Institute Technology will occupy 35% of the high-end market share due to technological barriers.

Conclusion

When foldable phones open and close freely in the palm of your hand, when satellite signals penetrate the ionosphere with precision, and when new energy vehicles start steadily in extremely cold environments, PI copper plated film is writing a material epic in the era of flexible electronics with nanometer level accuracy and system level intelligence.Advanced Institute of TechnologyThe innovative practice has proven that the evolution of materials is not simply the superposition of performance, but the creation of new dimensions of value through technological reconstruction - this may be the best footnote to the transition from Made in China to Created in China.