Grinding and polishing method of aluminum nitride ceramics

The manufacturing process of aluminum nitride ceramic circuit board is very complex. As mentioned before, the first step is the surface treatment of aluminum nitride ceramic circuit board, also known as grinding, which is used to remove the attachments on its surface and improve its flatness.

As we all know, the hardness of aluminum nitride ceramic circuit board is much higher than that of alumina ceramic circuit board. When meeting the requirements of thin plate thickness, grinding is a very difficult thing. It is necessary to ensure that the aluminum nitride ceramic circuit board will not break, and to meet the requirements of dimensional accuracy and surface roughness, which will test the operation of technicians.

Different grinding methods have a great impact on the flatness, productivity and yield of aluminum nitride ceramic circuit board, and the subsequent process is unable to improve the accuracy of the geometric shape of the substrate. Therefore, the aluminum nitride ceramic circuit board produced by stone is made of discrete abrasive double-sided grinding, which will increase the cost of the whole process for manufacturers. However, in order to make customers get a relatively perfect aluminum nitride ceramic circuit board, stone still made great efforts in this regard.

The choice of grinding fluid is also a very delicate topic. The grinding fluid used by purple core semiconductor is 3M. 3M has become a well-known multinational enterprise with diversified technology, producing and selling more than 60000 products worldwide. Among them, grinding consumables are one of the products produced by 3M company. 3M grinding fluid is an aluminum nitride ceramic circuit board surface treatment agent completely free of wax and silicone, and it is a grinding particle mixed with solvent or water. In short, it is a kind of liquid sandpaper, which is divided into coarse, medium coarse, fine and ultra-fine according to the size of particles. It is hand ground with five levels of grinding fluid and pneumatic grinding