Top Quality Alumina Ceramic Substrate | How to Better Than Metallization
1. Metallization process of alumina ceramic substrate
Alumina ceramics are most widely used in electrical and electronic applications due to their good electrical properties. As a substrate material for electronic appliances, surface metallization must be involved. Because ceramics are insulating materials, only the surface is metallized and conductive. This article will tell you about the surface metallization process of alumina ceramic substrates. Top Quality Alumina Ceramic Substrate | Ceramic metallization is to firmly attach a layer of metal film on the surface of the ceramic to realize the welding of ceramic and metal. More advanced applications are circuits formed on ceramic surfaces that can not only be soldered but also act as wires to carry electrical current. At present, the traditional metallization methods include thick film method, DBC, DPC, LTCC, HTCC.
2. Alumina ceramic plates are divided into two types: high-purity type and ordinary type
High-purity alumina ceramic substrate refers to the ceramic material with Al2O3 content above 99.9%. Since the sintering temperature is as high as 1650~1990℃ and the transmission wavelength is 1~6μm, the platinum crucible is generally replaced by molten glass; it can be used as a sodium lamp tube, which is light-resistant, It is resistant to alkali metal corrosion; it can be used as an integrated circuit substrate and a high-frequency insulating material in the electronics industry. Ordinary alumina ceramic substrates are divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties according to the content of Al2O3. Sometimes Al2O3 content of 80% or 75% is also classified as ordinary alumina ceramic series. Among them, 99 alumina ceramic materials are used to make high-temperature crucibles, refractory furnace tubes and special wear-resistant materials, such as ceramic bearings, ceramic seals, etc. Heshui valve disc; 95 alumina porcelain is mainly used as corrosion-resistant and wear-resistant parts; 85 porcelain is often mixed with some talc powder to improve electrical properties and mechanical strength, and can be sealed with molybdenum, niobium, tantalum and other metals, and some are used for electrical vacuum device. Top Quality Alumina Ceramic Substrate