There are many names for glue spreaders, in English they are called Spin Coater or Spin Processor, also known as glue spinner, glue spreader, spin coater, spin film coater, spin coating machine, spin coater, spin coater, spin film machine, spin coater, spin coater, and film spreader. Generally speaking, their principles are the same, that is, various types of glue are dripped on the high-speed rotating substrate, and the centrifugal force is used to evenly coat the glue dripped on the substrate on the substrate. The thickness varies depending on the viscosity coefficient between the different glues and the substrate, and is also related to the rotation speed and time.

In view of the current phenomenon that there are many brands of glue spreader machines in the market, and the quality varies, the author combines his practical experience in providing glue spreader machine technical services for many years to help users improve their ability to distinguish and provide users with intuitive and clear selection criteria.

From its principle, we can see several details that need to be paid attention to when purchasing a glue machine.

1. Rotation speed: The speed and control accuracy of the rotation speed are directly related to the thickness control and uniformity of the spin coating. If the indicated rotation speed and the actual rotation speed of the motor have a large error, it is impossible for researchers who require precision coating to obtain accurate experimental data. Some domestically produced glue spreaders can only provide a speed range and cannot accurately calibrate the real-time speed. Although most imported glue spreaders can calibrate the speed, most of the speed accuracy is not recognized by international standards. It is recommended to purchase those with internationally recognized standards for speed control, such as the US NIST standard.

2. Structure of vacuum adsorption system

The vacuum pump must be oil-free and the pressure must be accurately calibrated. The oil-free vacuum pumps produced domestically are not good enough. Because any oil stains may clog the vacuum pipe. If the vacuum adsorption force is reduced, the substrate will not be adsorbed and "flying pieces" will occur. It will also cause the glue liquid to accidentally enter the vacuum pipe system and cause complete blockage. Customers who have used domestic glue spreaders often care about how to clean them. Many foreign glue spreaders do a good job in this regard. They have a linkage mechanism. If the vacuum adsorption force is not enough, they will not start to rotate.

3. Material selection

For the application of semiconductor chemical industry, the choice of material is particularly critical. Most of the glue machines are made of stainless steel or ordinary plastic because the cost of this material is very low. Stainless steel is not very resistant to corrosion of various chemical glues, and plastic is easy to deform under high temperature and pressure. If this deformation causes the position of the tray to lose level, it will cause a bumpy state when spinning. Naturally, it is impossible to get a good spin coating effect. For example, the American models are made of natural polypropylene (NPP) or polytetrafluoroethylene (Teflon, PTFE). These two materials have the advantages of green environmental protection, resource saving, light weight, high strength, good impact resistance, durability, natural pattern, and good gloss.