日本工业大学的村川正夫教授等人成功地将CBN(立方氮化硼)膜涂覆在钻头等旋转工具及剪切加工工具上.据说,虽然以前在形状单一、尺寸较小的切削刀片上有过涂层的实例,但在形状复杂,要求成膜面积较大的旋转工具上进行涂层这还是首次成功. Professor Masashi Murakawa of Nippon Soom University successfully coated CBN (cubic boron nitride) film on rotary tools such as drill bits and cutting tools, although it is said that although cutting blades of a single shape and a smaller size have been used It is the first time to coat an example, but coating on a rotating tool with a complicated shape that requires a large film-forming area.