In the world of electronic products, chips, circuit boards, sensors, etc. are undoubtedly the protagonists, but there is a type of “invisible hero” that silently supports the performance and lifespan of electronic devices – that is, electronic adhesives. Today, Yilian will talk about the types, functions, application scenarios, and future trends of electronic adhesives.
1、 What is electronic adhesive?
Electronic adhesive is a type of adhesive specifically designed for electronic components, used for bonding, fixing, sealing, conducting electricity, conducting heat, etc. It is a chemical material that can provide mechanical support, protection, and special functions such as conductivity, insulation, and heat dissipation. Compared with ordinary glue, electronic adhesive has higher insulation, heat resistance, aging resistance and environmental adaptability, and is one of the key materials to ensure the long-term stable operation of electronic products.
2、 The main function of electronic adhesive
Adhesive fixation: Fixing chips, capacitors, inductors, modules and other components to prevent displacement or damage caused by vibration or impact.
Thermal conduction and heat dissipation: dissipate the heat generated during the operation of components to avoid local overheating and extend their lifespan.
Electrical performance guarantee: including insulation, conductivity, meeting different functional requirements, such as conductive adhesive, insulating adhesive, etc.
Sealed protection: Waterproof, dustproof, and chemically resistant, protecting precision electronic components from stable operation in harsh environments.
Stress release: Reduce internal stress caused by thermal expansion and contraction, avoid solder joint cracking and circuit board deformation.
3、 The main types of electronic adhesives
- Epoxy resin adhesive
Features: Excellent adhesive strength, good temperature and chemical resistance, high electrical insulation performance.
Applications: chip packaging, coil encapsulation, transformer, sensor bonding, module structure reinforcement, etc. - Organic silicone gel (silicone gel)
Features: Soft and elastic, resistant to high and low temperatures (-60~200 ° C), good moisture resistance and aging resistance.
Application: LED packaging, circuit board protection, electronic module sealing, insulation. - Polyurethane adhesive
Features: Good flexibility, low temperature resistance, moderate adhesive strength, suitable for stress buffering.
Applications: automotive electronics, battery packs, sensors, and other scenarios that require flexible protection. - Acrylic adhesive
Features: Fast curing, suitable for efficient production lines, some products have conductivity.
Application: Quickly assemble electronic products such as speakers, screen components, motor mounts, etc. - Conductive/Thermal Conductive Adhesive
Features: It has good electrical or thermal conductivity and provides adhesive function.
Application: IC chips, heat sinks, LEDs, etc. require thermal and electrical conductivity.
4、 Key application areas of electronic adhesives - Consumer electronics (mobile phones, tablets, computers)
Screen and border adhesion
Fixed battery module
Fingerprint recognition, camera module assembly
PCB board coating protection - Automotive Electronics
ECU、BCM、 Adhesive sealing of sensor module
Motor, headlight, charging station control module
Thermal conductivity and sealing of battery modules for new energy vehicles - LED lighting
Lamp bead packaging
Heat sink and substrate bonding for thermal conductivity
Waterproof sealing of drive power supply - Semiconductors
Chip packaging and underfill
Power device heat dissipation adhesive
Fixing and Thermal Conductivity of Semiconductor Modules (such as IGBT, MOSFET)
Structural bonding and protection of advanced packaging (such as SiP, Fan out, 3D packaging)
Sealing and conductive connections of wafer level devices - Industrial control and medical equipment
Controller and driver component protection
Adhesive insulation for precision medical electronic equipment
Instrument protection sealing
5、 Precautions for selecting electronic adhesives
Matching usage environment: such as temperature range, humidity, chemical corrosion, mechanical vibration, etc.
Material compatibility: adhesion to the material being bonded (such as metal, plastic, glass, etc.).
Curing method: Choose processes such as thermosetting, UV curing, and room temperature curing to match the production line efficiency.
Functional requirements: Do special properties such as thermal conductivity, electrical conductivity, insulation, flexibility, flame retardancy, etc. are required.
Reliability requirements: Meet high reliability requirements, such as automotive electronics, medical devices, and other high standard applications.
6、 The development trend of electronic adhesives
Environmentally friendly adhesive: solvent-free, low VOC (volatile organic compounds), halogen-free, more environmentally friendly, in compliance with ROHS and REACH standards.
High performance functional adhesive: such as high thermal conductivity, high insulation, and low dielectric constant materials, suitable for the high-frequency and high-speed development of 5G and AI chips.
Intelligent self-healing adhesive: With self-healing function, it improves the fatigue resistance of electronic devices and extends their service life.
Rapid solidification technology: adapted to the rapid production line of electronic products, improving production efficiency.
In today’s era of rapid development of interconnectivity and intelligence, electronic products are ubiquitous. From smartphones, cars, home appliances, to 5G AI、 Behind every function of medical equipment, the support of electronic adhesives is indispensable. It is not just an adhesive, but also a core material that ensures the performance, lifespan, and safety of electronic products.
In the future, with the miniaturization, integration, and intelligence of electronic devices, higher performance requirements have been put forward for electronic adhesives, and the industry will also usher in more innovation. Choosing a suitable electronic adhesive means that the product is more stable, efficient, and safe.
Tag: Electronic Adhesive
