PET bonded copper foil: one of the preferred materials for flexible printed circuits

With the continuous development of technology, people are increasingly dependent on electronic products, and flexible printed circuits, as a new type ofCircuit board materialIt is gradually becoming the focus of people's attention. PET laminated copper foil is a very important material in flexible printed circuits, and its excellent mechanical and electrical properties make it one of the preferred choices in the manufacturing process of flexible circuits.

PET laminated copper foil is a composite material composed of polyester film and copper foil, which possesses the flexibility of polyester film and the conductivity of copper foil. Compared to traditional rigid circuit boards, PET bonded copper foil can be freely bent and curled, and can be cut into various shapes as needed, greatly improving the flexibility and adaptability of the circuit board. At the same time, PET bonded copper foil also has excellent corrosion resistance, allowing it to maintain good electrical stability even in harsh environments.

PET bonded copper foil has many other advantages, such as good durability and dimensional stability, and is easy to process. It can be made through various methods such as hot pressing and cold pressing. Meanwhile, with the continuous improvement and enhancement of production technology,PET bonded copper foilThe reliability and performance are also guaranteed.

PET laminated copper foil is a flexible circuit board material composed of polyester film and copper foil composite.
The manufacturing process of PET bonded copper foil mainly includes the following steps:

1. Raw material selection: Polyester film and pure copper foil are used for manufacturingPET bonded copper foilThe main raw materials. Polyester film can be prepared by chemical, physical, or mechanical methods, while pure copper foil needs to be prepared after smelting and processing. The selection of raw materials is crucial as they directly affect the quality of the product.

2. Composite treatment: Composite treatment of polyester film and copper foil, which is the core step of PET bonded copper foil manufacturing. This step usually uses vacuum coating or coating method to composite hard copper foil with soft polyester film, forming a bendable and foldable PET bonded copper foil material.

3. Surface treatment: Surface treatment has a significant impact on the conductivity and corrosion resistance of PET bonded copper foil. The surface treatment process mainly includes metallization, mask printing, passivation, etc. Through these steps, the PET bonded copper foil surface can be made smoother and stronger, and its conductivity can be improved.

4. Cutting and folding: In practical applications, it is necessary to cut and fold PET bonded copper foil according to specific dimensions. This step is usually completed using a micro cutting machine to ensure cutting accuracy and stability.

5. Inspection: The final step is to conduct quality inspection on PET bonded copper foil, including appearance inspection, size measurement, conductivity testing, etc. Only after strict quality inspection and meeting relevant standards can the next step of production or sales be carried out.

In flexible printed circuits, PET bonded copper foil is commonly used for the following purposes:

1. PCB connection:PET bonded copper foilIt can be used as a connection between various parts on a PCB board, such as chips, sensors, LED lights, etc. Compared to using hard circuit boards, flexible circuits made of PET bonded copper foil can better adapt to product shape changes and mechanical impacts.

2. Antenna design: PET bonded copper foil plays an important role in antenna design in the field of wireless engineering. Due to its high plasticity and conductivity, PET bonded copper foil is widely used in antenna design for mobile devices such as smartphones, tablets, and smartwatches.

3. Flexible display: Due to the excellent flexibility and conductivity of PET bonded copper foil, it can be used to produce flexible OLED display screens, curved screens, etc. Compared to traditional glass substrates, PET bonded copper foil substrates have higher flexibility and will not produce cracks or fractures under bending, folding, and other conditions.

4. Sensor manufacturing: PET coated copper foil can be used to produce sensors in various shapes, such as blood pressure monitors, thermometers, heart rate monitors, etc. Sensors made of PET bonded copper foil have excellent flexibility, durability, and accuracy.

5. Flexible power supply: Due to the conductivity of PET bonded copper foil, it can be used to produce flexible batteries, flexible solar cells, etc. Compared to traditional batteries, flexible batteries can provide greater power in a smaller space and can also function normally in flexible dynamic environments.

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