Driven by the increasingly vigorous demand of brittle material industry, new manufacturing processes have emerged. Advantage of laser processing brittle materials is laser welding - direct laser welding without any additives; It can realize sealing welding in a wide range, without edge collapse and microcrack, and the welding area can not be seen by visual inspection, which overcomes the process difficulties of optical grade gap requirements. Because of its fragile features, it is very difficult to process micro holes by ordinary laser process. When ultra fast laser is used for micro hole processing, there is no physical contact and no mechanical stress acting on the film, which reduces the occurrence of fragmentation. The ultra fast laser spot is small and the processing precision is high, which can realize the corner radian of < 10um.