Requirements for the Use of Glass Cloth in the Electronics Industry
The electronic cloth is one of the three main raw materials of the copper clad plate. Some important properties of the copper clad plate are closely related to the performance and quality of the glass cloth. Glass composition, fiber composition, yarn and fabric structure, appearance and internal quality, surface treatment and other factors not only directly affect the performance and usage of CCL, but also affect the manufacturing process of CCL. Therefore, the technical requirements of the electronic industry to glass cloth are getting higher and higher, and their requirements can be roughly summed up as follows:
1. Excellent electrical performance. The glass cloth is the insulating base material of the copper clad plate. The electrical insulation property of the copper clad plate depends on the electrical insulation property of the glass cloth. The electrical insulation performance of glass cloth is determined by glass type. The alkali free glass must be used in electronic fabric. Especially, the content of alkali metal oxide in glass composition has notable influence on its insulation performance.
2, The uniformity of the material. The uniformity of the material of the PCB depends to a great extent on the uniformity of the material of the glass cloth. The manufacturing process of copper clad laminate also requires high quality uniformity of glass cloth. The key index of material uniformity of glass cloth is the unit area quality of cloth, which is called single weight and allowable tolerance. The single weight of the cloth is rated by the electronic cloth.
3. Good dimensional stability. During the manufacturing process of PCB, there are many chemical and thermophysical processes, requiring that the plate can maintain stable size without distortion and warpage. The glass cloth is the structural material of the circuit board, and the dimension stability of the cloth is the basic guarantee for the dimensional stability of the sheet.
4. Mechanical properties and drilling machinability. The mechanical properties of the PCB depend mainly on the mechanical properties of the glass cloth. After hot cleaning, the strength loss of glass cloth is large, but if the thermal cleaning effect is sacrificed to improve the retention strength of cloth, it will also affect the combination of resin and glass, and ultimately reduce the mechanical properties of laminated material.
In addition to the above several requirements, as well as solder resistance, appearance quality, surface smoothness and wide package etc.. The production and application of glass cloth in foreign electronics industry has been in the history for many years. Our country is still in the initial stage. This article helps our domestic counterparts understand the technical requirements of glass cloth for electronic industry. If you need to process epoxy glass laminates, you can contact our online customer service.