Congratulation, YUYIN MATERIAL TECHNOLOGY (SHANGHAI）CO.,LTD has been succeeded to develop EP Mother Pipe which used on domestic semiconductor industry, independently and delivered products, successfully.  Nonmetallic inclusion of  raw material, A、B、C、D、Ds、is 0, and the lowest roughness for indie of pipe ( Pipe Size:6.35 x 0.89mm ) is 0.067um.