Innovative application of PET thermal release film in the electronics industry
Publish Time: 2025-05-06
PET thermal release film is a film used as a backing material in the production of pressure-sensitive labels, tapes and adhesive products. It is made of polyethylene terephthalate (PET), a material known for its excellent mechanical strength, temperature resistance and dimensional stability. At the same time, its surface is coated with a layer of silicone to form a release layer with low surface energy, so that the sticky material can be easily peeled off without residue.
As electronic products develop towards thinness and high integration, PET thermal release film has gradually shown its diverse innovative application value in the field of electronic manufacturing with its excellent physical properties and functionality.
1. Key auxiliary materials in the manufacture of flexible display screens
In recent years, flexible OLED displays have become an important development direction for high-end electronic products such as smartphones and wearable devices. In the process of laminating and module assembly of flexible screens, high-performance optical adhesives (such as OCA optical adhesives) are required, and these adhesives are usually attached to the release film before transportation and processing. PET thermal release film is an ideal carrier for OCA tapes because of its high flatness, good light transmittance and strong thermal stability. It not only ensures that the adhesive material does not deform or fall off during the high-temperature process, but also achieves adhesive-free peeling, ensuring the display effect and reliability of the final product.
2. Temporary support and protective layer in semiconductor packaging
In advanced packaging technologies, such as wafer-level packaging (WLP) and fan-out packaging (Fan-Out), chips need to go through multiple precision steps such as cutting, handling, and bonding. In this process, PET thermal release film is used as a temporary bonding substrate to carry thin wafers or chips to prevent them from breaking or contaminating during operation. Through a specific thermal peeling process, the release film can be safely removed after the package is completed without leaving any residue, thereby improving the package yield and efficiency.
3. Stable platform during precision die-cutting and bonding
During the assembly process of electronic components, a large number of bonding materials such as double-sided tape, foam tape, and conductive adhesive are used. These materials are usually stored in roll form before processing and rely on release films for separation and protection. PET thermal release film has good dimensional stability and temperature resistance, and can adapt to the requirements of high-speed die-cutting equipment, ensuring that the adhesive material does not deform or shift during the punching process, thereby improving the overall assembly accuracy and automation level.
4. Release support for thermal conductive and electromagnetic shielding materials
With the development of 5G communications and high-frequency electronic devices, new functional materials such as thermal conductive gaskets, conductive foams, and absorbing materials are widely used in heat dissipation management and electromagnetic interference (EMI) protection. In the production process of these materials, PET thermal release film is often used as a coating substrate or transfer film, which not only plays a supporting and isolating role, but also can be given anti-static and low outgassing functions through special coating design, meeting the high standards of the electronics industry for clean environment and signal stability.
5. Green choice under the trend of environmental protection and sustainable development
The modern electronic manufacturing industry pays more and more attention to environmental compliance. Traditional release films may have problems such as difficulty in recycling or fluorine-containing release agents. As a recyclable material, PET thermal release film, combined with water-based silicone oil or environmentally friendly coating technology, can reduce carbon footprint while ensuring performance, which is in line with the development trend of green manufacturing and circular economy. This makes it more competitive in the supply chain audit of international brand customers.
In summary, PET thermal release film is no longer just an "auxiliary material" in the traditional sense, but has gradually evolved into an indispensable functional material in electronic manufacturing. Whether in the fields of flexible display, semiconductor packaging, bonding die-cutting, electromagnetic shielding, etc., it has demonstrated excellent performance advantages and broad application prospects.
