Fuji Manufacturing Co., Ltd.

Mizuki Sekizawa

Keiji Mase

Shozo Ishibashi

A method for surface treatment of a workpiece made from a hard-brittle material comprises first blasting employing abrasive grains of higher hardness than a hardness of a base material of the workpiece for forming a three dimensional recess-protrusion profile having protrusions and recesses formed between the protrusions on a surface of the workpiece; and second blasting employing an elastic abrasive having a structure in which abrasive grains carried in and/or on an elastic body made from material with low rebound elasticity for polishing the surface of the workpiece formed with the recess-protrusion profile so as to achieve an arithmetic average roughness Ra of not greater than 1.6 &#x3bc;m on the surface of the protrusions and the recesses on the workpiece while maintaining the recess-protrusion profile formed by the first blasting.

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Tokyo, Japan

Mizuki Sekizawa