Electronic adhesives are indispensable auxiliary materials in the electronics industry. Through functions such as bonding, sealing, potting, coating, conductivity, thermal conductivity, and insulation, they enhance the reliability, stability, and lifespan of electronic products. Their applications cover multiple fields, including electronic component fixing, heat dissipation module installation, and high-voltage insulation protection, providing crucial support for the operation of electronic equipment in complex environments. Electronic adhesives are mainly classified into silicone, epoxy, acrylic, and polyurethane adhesives, among which silicone and epoxy adhesives are widely used due to their superior performance. Electronic adhesives occupy the top of the market pyramid, boasting high added value, advanced technology, and outstanding performance, truly deserving the title of "crown jewel" of high-tech manufacturing.
Electronic Adhesive Market Application Classification The electronic adhesive market application can be divided into three main categories: electronic assembly, semiconductor packaging, and optical display. ⑴ Electronic assembly generally includes: smartphones, laptops/tablets, TWS earphones, smart speakers, wearable devices, AR/VR, automotive electronics/drone electronics, 5G communication, and the Internet of Things. Parts involved include cameras, speakers, cover plates, screens, and bezels. The main types of adhesives include epoxy structural adhesives, two-component acrylate structural adhesives, UV adhesives, anaerobic adhesives, instant adhesives, polyurethane adhesives (structural adhesives, PUR adhesives), and silicone adhesives (conformal, thermally conductive, sealing, and potting). (2) Semiconductor packaging applications can be divided into integrated circuit packaging and LED packaging. Adhesives used in integrated circuit packaging include underfill adhesives, surface mount adhesives/dam adhesives, die bond adhesives, and thermally conductive interface materials (polymers). Adhesives used in LED packaging include encapsulating silicone and epoxy adhesives. (3) Optical display adhesives (OCA/LOCA) are used to bond LCD or OLED displays, touch layers, cover plates, etc., and are indispensable materials in display modules.
Analysis of my country's Electronic Adhesive Industry and Market Size As a key link in the electronic manufacturing industry chain, electronic adhesives have shown rapid growth in recent years driven by technological upgrades and downstream demand. According to statistics and analysis from the China Adhesives and Adhesive Tapes Industry Association, the total consumption of electronic adhesives in my country is currently approximately 20,000 tons, with a market size of about 12 billion yuan. Consumption accounts for about 0.2% of the total output of the adhesive industry, and market size accounts for about 10% of the total output value. Specifically, in terms of market size by application category, semiconductor packaging adhesives and optical display adhesives have a relatively high market share; in terms of product system, acrylate, silicone, and epoxy systems have a relatively high market share; and in terms of market size by domestic and foreign brands, the overall self-sufficiency rate of electronic adhesives is only 30%, with lower self-sufficiency rates for semiconductor packaging and optical display adhesives, and higher self-sufficiency rates for lighting and electronic assembly adhesives.
Development Trends and Future Prospects of Electronic Adhesive Technology
With the continuous expansion of application scenarios for electronic adhesives and the ongoing innovation in downstream technologies and processes, the China Adhesives and Adhesive Tapes Industry Association believes that the development trends of electronic adhesive technology in my country are as follows:
1. With the rapid development of electronic products in terms of miniaturization, integration, and portability, the requirements for the thermal conductivity, adhesive performance, and special functionalities of electronic adhesives are becoming increasingly stringent, and the functions of electronic adhesives will become more diversified.
2. Based on process and performance requirements, underfill adhesives need to possess the basic characteristics of easy handling, rapid flow, rapid curing, long service life, high bond strength, and low modulus, while also meeting requirements for filler properties, compatibility, and reworkability.
3. Vigorously develop conductive adhesives with high conductivity, high bond strength, and high stability at room temperature curing; develop new conductive fillers; develop new conductive adhesive curing systems; and develop flexible conductive adhesives with excellent adhesion to stretchable substrates and electronic components.
4. For adhesives used in optical displays, in addition to basic characteristics such as high light transmittance, low haze, refractive index close to the substrate, and good adhesion, they also require stability in bonding to curved surfaces, high flowability, dynamic and static bending performance, and optical improvement properties.
5. The core of improving the quality and performance of electronic adhesives lies in employing high-purity matrix resins with narrow molecular weight distribution, compounding with spherical fillers, using special toughening technologies, designing and preparing crosslinking agents with special structures, and implementing precise production processes.
As a crucial material in the electronics industry, the development of electronic adhesives is deeply intertwined with the technological iterations of downstream fields such as electronic information, semiconductors, and new energy. Currently, the industry exhibits three core trends: innovation-driven development, green transformation, and market expansion. In the future, it is expected to achieve a dual leap in scale and quality through technological breakthroughs and application expansion.
