PET copper plated film | the "new star of conductivity" in the field of flexible electronics

Introduction

In today's rapidly iterating era of flexible electronic devices and new energy battery technology, material innovation has become the key to breaking through performance bottlenecks. The PET copper plated film independently developed by Advanced Institute Technology, with its unique advantage of "combining rigidity and flexibility", has sparked a wave of application in consumer electronics, energy storage equipment and other fields. This composite material that perfectly blends the flexibility of polymer materials with the conductivity of copper metal is redefining the manufacturing standards for flexible circuits.

1、 Materials Revolution: From Molecular Structure to Functional Transition

PET copper plated filmThe core lies in its composite structure design. As a substrate, PET film (polyethylene terephthalate) has a regular arrangement of molecular chains, which endows the material with excellent mechanical strength and chemical corrosion resistance. Its elongation at break can reach over 150%, ensuring structural stability during repeated bending. The copper layer deposited by vacuum magnetron sputtering technology can be precisely controlled in the thickness range of 50nm to 5 μ m, with a surface roughness Ra ≤ 0.5 μ m, forming a continuous and dense conductive path.

This composite structure solves two major pain points of traditional flexible circuits: on the one hand, the direct etching process of copper foil has problems such as low material utilization rate (usually less than 60%) and edge burrs; On the other hand, pure PET film is flexible but cannot conduct electricity. The advanced technology adopts a step-by-step deposition process, which first activates the PET surface through plasma cleaning, and then uses high-purity copper target material for atomic level deposition, ensuring that the interface bonding strength between the copper layer and the substrate reaches over 12N/cm, far exceeding industry standards.

2、 Technological breakthrough: the three major moats of precision manufacturing

In terms of preparation process,Advanced Institute of TechnologyConstructed differentiated technological barriers. The vacuum magnetron sputtering equipment is equipped with a multi-target system, which can achieve gradient deposition of multi-layer metals such as copper/nickel/silver, meeting the conductivity and corrosion resistance requirements of different scenarios. The chemical plating process uses a self-developed stabilizer system to control the deposition rate at 0.1 μ m/min, avoiding the accumulation of internal stress caused by the rapid growth of the copper layer.

The ability to customize thickness is another major advantage. From ultra-thin (single-sided copper layer ≤ 0.1 μ m) for flexible display screens to thick copper (double-sided copper layer ≥ 3 μ m) for power battery current collectors, Advanced Institute Technology has achieved thickness tolerance control within ± 5% by adjusting sputtering power and gas flow parameters. This precise control originates from a real-time monitoring system for sedimentation rate, which collects over 200 sets of data per second to ensure process stability.

3、 Market validation: a leap from laboratory to industrialization

The procurement case of a new energy research institute in Guangzhou is highly representative. At the initial stage, the institution only conducted welding tests on the power battery terminals using samples. The results showed that the PET copper plated film had a resistance change rate of less than 0.5%/℃ in the temperature range of -40 ℃ to 120 ℃, which was better than the traditional copper foil's 1.2%/℃; After 1000 bending tests, the conductivity decreased by only 3%, while the copper foil showed cracks after 200 bending tests.

Based on test data, the research institute has ordered a large quantity of PET copper plated film for the manufacturing of current collectors for 4680 large cylindrical batteries. Compared to traditional copper foil solutions, PET copper plated film reduces battery weight by 15%, increases energy density by 8%, and eliminates etching waste liquid emissions during production, which is in line with the trend of green manufacturing. At present, Advanced Institute Technology has established joint research and development centers with multiple leading enterprises to develop specialized models for scenarios such as 5G communication and wearable devices.

4、 Future Vision: The "Infrastructure" of Flexible Electronics

With a compound annual growth rate of over 30% in the shipment of foldable screen smartphones and the acceleration of the industrialization process of solid-state batteries, the market demand for PET copper plated film is growing exponentially. The transparent conductive product being developed by Advanced Institute Technology is expected to be applied in cutting-edge fields such as AR glasses by depositing indium tin oxide (ITO) on the surface of the copper layer to achieve a light transmittance of ≥ 85% while maintaining a square resistance of ≤ 10 Ω/□.

In the field of new energy, the microporous copper plated film developed by the company has passed the puncture test of power batteries. Its unique three-dimensional conductive network structure can increase the efficiency of lithium-ion transmission by 20%. This material innovation not only drives industrial upgrading, but also redefines the design boundaries of electronic devices - when the conductive layer can bend like paper, future smart devices may break through the constraints of existing forms.

Advanced Institute of TechnologyPET copper plated filmThe industrialization practice of materials science has proven that breakthroughs often begin with the ultimate pursuit of basic performance and result in collaborative innovation of interdisciplinary technologies. In the current global wave of flexible electronics, this composite material that combines both soft and hard materials is becoming a bridge connecting imagination and reality. If you need to customize thickness or obtain technical white papers, please log in to the official website to submit your requirements. Our professional team will respond within 24 hours.