The main components of surface welding paste and its guarantee for welding performance

1、 Introduction to Surface Welding Gold Paste

Surface welding gold paste plays an important role in the field of modern electronic welding, for example, the research platinum brand YB8108 is a representative oneSurface welding gold pasteProduct, byAdvanced Institute (Shenzhen) Technology Co., LtdResearch and development production. It is widely used in fields such as PCB boards, microelectronics, and precision equipment, which can improve conductivity and mechanical strength. It also has advantages such as high temperature resistance, oxidation resistance, effective prevention of solder joint corrosion, rapid curing, and easy operation, greatly improving production efficiency.

2、 Main components of surface welding gold paste

1. Gold (Au)
   • Gold is one of the main components of surface welding paste. Metal fittings have good conductivity and high electrical conductivity, which enables effective conduction of current during welding and reduces energy loss. For example, at the tiny solder joints of some electronic components, the high conductivity of gold ensures accurate signal transmission. According to relevant research, the conductivity of gold is approximately 45.5 × 10 ⁶ S/m (Siemens/meter).
   • Gold has stable chemical properties and is not prone to chemical reactions with other substances. In the welding environment, there may be various gases, impurities, etc., but gold can maintain its chemical properties and will not be oxidized or corroded. This feature ensures the stability of the welding point during long-term use.
2. ALLOY COMPOSITION
   • In addition to gold, it may also contain other alloy components. For example, small amounts of precious metals such as platinum (Pt) and palladium (Pd) may be added to some gold paste products. These alloy components can improve the welding performance of the gold paste. useResearch Platinum Brand YB8108For example, although the specific alloy ratio is a trade secret, research has shown that adding appropriate amounts of platinum and palladium can improve the melting point adjustment ability of gold paste. The melting point of platinum is 1768.3 ° C, and the melting point of palladium is 1554.9 ° C. By forming an alloy with gold, the melting point range of the gold paste can be adjusted to make it more suitable for different welding process requirements.
   • The alloy composition may also affect the wettability of the gold paste. Wettability refers to the ability of liquid solder to spread on the surface of the metal being welded. Good wettability can enable the gold paste to spread better on the welding surface, fill the welding gap, and thus form a firm welding joint.
3. frit
   • Glass powder inSurface welding gold pasteIt also plays an important role. Glass powder will melt during the heating process, and it can act as a binder to bond gold and other components together, while also helping to bond the gold paste to the welding substrate. Glass powders with different particle sizes and compositions can affect the sintering performance of gold paste. For example, glass powders with smaller particle sizes can be more evenly distributed during sintering, improving the density of the gold paste.
4. organic vehicle
   • Organic carriers are an important component of gold paste. It mainly plays a role in dispersing gold powder and other solid components, making the gold paste have good fluidity and printability. Organic carriers are usually composed of organic solvents, resins, etc. During the printing or coating process before welding, organic carriers can evenly distribute the gold paste at the welding site. During the welding process, as the temperature increases, the organic carrier will evaporate, leaving only gold and other solid components to form the welded joint.

3、 How can these components ensure their good welding performance

1. The guarantee of welding performance by gold and alloy composition
   • The high conductivity and chemical stability of gold directly ensure the electrical performance and long-term stability of the welding point. During the welding process, gold can form a good metal bond with the surface of the metal being welded. For example, when welding copper components, gold can diffuse with copper atoms to form a strong bonding interface.
   • The addition of alloy components such as platinum and palladium can be adjustedwine of the best qualityOptimizing welding performance through melting point and wetting properties. A suitable melting point can ensure that the gold paste can melt at an appropriate temperature during the welding process, without being difficult to melt due to a high melting point, nor causing melting deformation before welding due to a low melting point. Good wettability can allow the gold paste to fully spread on the welding surface, reducing welding defects such as porosity and virtual welding.
2. The guarantee of welding performance by glass powder
   • The melting and bonding effect of glass powder during sintering helps to improve the bonding strength between the gold paste and the welding substrate. It canFill gold pasteThe small gaps between the substrate make the welded joint denser. For example, when welding ceramic substrates, glass powder can interact with the microstructure of the ceramic surface, enhancing the adhesion between the gold paste and the ceramic.
   • The presence of glass powder can also adjust the sintering temperature curve of the gold paste. By selecting glass powders with different compositions and contents, the sintering process of the gold paste can be completed within a suitable temperature range, matching the temperature requirements of the entire welding process.
3. The guarantee of welding performance by organic carriers
   • The dispersion effect of organic carriers ensures the uniformity of various components in the gold paste. When printing or coating gold paste, if the composition of the gold paste is uneven, it may lead to inconsistent performance of the welding points. Organic carriers enable the gold paste to evenly cover the welding area, ensuring that each welding point has similar performance.
   • The volatilization characteristics of organic carriers are also crucial. During the welding process, the organic carrier can completely evaporate at an appropriate temperature without leaving impurities in the welded joint, thereby ensuring the purity and reliability of the welded joint.

Surface welding gold pasteThe various components of the YB8108 are coordinated with each other to ensure its good welding performance from different aspects, enabling products like the Yanbo brand YB8108 to play an important role in the field of electronic welding and meet the high requirements of modern electronic devices for welding quality and performance.