Patent ID: 8360436

Claim:
A mechanical seal sliding member used as a stationary sliding member or a rotary sliding member in a mechanical seal configured to seal object fluid existing at one side of a radial direction of sliding surfaces slidingly rotating relative to the respective sliding surfaces of the stationary sliding member and the rotary sliding member, wherein, a plurality of grating sections are formed separately along a circumferential direction, each of said grating sections consists of a periodic structure that a plurality of linear shape ridge portions parallel to each other are formed in a predetermined region with a predetermined pitch, said linear shape ridge portions of said plurality of grating sections are formed as inclined at a predetermined angle to a sliding direction of said sliding surfaces, said linear ridge portions have a depth of about half of a laser wavelength or less, and said grating sections are formed so as not to be arranged in a border section of an atmosphere side of a sliding section of said stationary sliding member and the rotary sliding member.