Before the advent of PCB printed circuit boards, the connections between electronic components relied on the direct connection of wires to form a complete circuit, which was bulky and heavy and had high power consumption, which was not conducive to the precision development of the electronics industry. Since the semiconductor transistor in the 1950s Since its emergence, the demand for printed boards has risen sharply. In particular, the rapid development and wide application of integrated circuits have made the volume of electronic equipment smaller and smaller, and the density and difficulty of circuit wiring have become greater and greater, which requires continuous updating of printed boards. Since the production of printed circuit boards is in the latter half of electronic equipment manufacturing, it is called the downstream industry of the electronics industry. Almost all electronic devices need the support of printed circuit boards, so printed circuit boards are products with a high market share in electronic component products.

　　 The development of PCB circuit boards has also brought about the continuous development of its accessories. Among them, the requirements for adhesives are also increasing and higher and higher. PCB manufacturers simply analyze the current cases and functions of adhesives in the PCB circuit board industry.

Potting glue: used for PCB surface infusion and sealing, low viscosity and good flow, can cover and fill PCB, play a role of sealing protection, in addition, it can also increase functions such as flame retardant, heat conduction, waterproof, confidentiality, flame retardant, etc., mainly Adhesives include epoxy resin, silicone, polyurethane Pu, potting glue is a common electronic glue application, widely used in motherboards, control boards, chips, and so on.

Heating curing adhesive: most of them are single-component epoxy resin adhesives, with medium and high viscosity, which can be adjusted according to requirements for difficult molding effects. They can be dispensed and are also very suitable for stencil screen printing. The heating temperature is adjustable, high temperature and aging resistance. Corrosion, bonding and sealing strength is higher than the general two-component AB glue, and can also increase functions such as flame retardant, thermal conductivity, waterproof, confidentiality, flame retardant and so on.

　　Red glue: With the miniaturization, integration, and precision of electronic components, the perforated plug-in components used in the past can no longer be reduced, and SMT surface mount components have to be used. , A variety of computer-aided design (CAD) printed circuit board application software has been popularized and promoted in the industry. In specialized printed board manufacturers, mechanized and automated production has completely replaced manual operations. So SMT electronic accessories solder paste, red glue also came into being. The red glue is heated and cured, and the main component is epoxy resin. It is used to bond and fix the electronic components on the surface of the PCB. It can withstand high temperature (280-300℃), fast curing, and the bonding effect is firm and reliable. It is environmentally friendly and halogen-free to meet the needs of more The increasingly stringent environmental protection directive requirements.

Quick-drying glue: most of the electronic components or parts used for bonding and fixing PCB boards, such requirements can be used epoxy resin AB quick-drying glue or acrylic AB quick-drying glue, polyurethane and other structural adhesives, the bonding strength is very good High, the curing speed is faster, but the operation time is shorter, which is not conducive to mass production. In addition, if there is a need for heat dissipation or temperature resistance, the silicone quick-drying glue can be used, the curing time is slightly slower, and it is elastic and heat resistant.

Thermal conductive adhesive: With the application of 5G and AI technology, the intelligent functions of electronic products have increased, and heating issues have also received more and more attention. There are more and more thermal conductive materials for motherboards, chipsets, and PCBA. Thermal conductive products are mainly silicone and Epoxy resin can meet the thermal conductivity requirement of 1.0-5.0 coefficient. It is self-dried and not dry. Each has its own advantages and diversified service market needs. It is widely used in power supply, storage, communication, LED lighting and other industries.

Three-proof paint: also called electronic three-proof glue, PCB board surface coating protection, generally transparent and low viscosity, waterproof, moisture-proof, corrosion-proof insulation, simple operation and fast curing, can add color or fluorescence detection, spraying, brushing and dipping are very suitable for large Rapid mass production, protect PCB board from moisture, reagents, leakage, short circuit, external impact and other troubles.