Member with concave portion and method for manufacturing same

摘要

Provided are a member with recessed portions which solves the problem of fogging, and a method of manufacturing the same. The member with recessed portions, includes: a printing area in which a large number of recessed portions are formed on a surface thereof; and a non-printing area in which the recessed portions are not formed on the surface thereof, the surface being brought into contact with a viscous material so that the viscous material accumulates in the recessed portions, the excess viscous material being scraped off the surface by causing a doctor blade to horizontally stick up on the surface and relatively moving the doctor blade. The member with recessed portions further includes: a base member having the printing area in which the large number of recessed portions are formed on the surface and the non-printing area in which the recessed portions are not formed on the surface; and a DLC coating formed so as to cover the printing area and the non-printing area. The surface is provided with a plurality of grinding traces, which are formed by grinding the DLC coating, and form an inclined angle of other than 0° and 90° with respect to an imaginary extension of the doctor blade which horizontally sticks up on the surface.

主权项

1. A member with recessed portions, comprising:
a printing area in which a large number of recessed portions are formed on a surface thereof; and a non-printing area in which the recessed portions are not formed on the surface thereof,
the surface being brought into contact with a viscous material so that the viscous material accumulates in the recessed portions,the excess viscous material being scraped off the surface by causing a doctor blade extending horizontally across the surface to contact the surface and relatively moving the doctor blade, wherein: the member with recessed portions further comprises:
a base member having the printing area in which the large number of recessed portions are formed on the surface and the non-printing area in which the recessed portions are not formed on the surface; anda DLC coating formed so as to cover the printing area and the non-printing area; andthe surface is provided with a plurality of grinding traces, which are formed by grinding the DLC coating, and form an inclined angle of other than 0° and 90° with respect to an imaginary reference line corresponding to the doctor blade extending horizontally across and in contact with the surface, wherein a mean roughness Sa of the surface in the non-printing area of the member with recessed portions is 0.005 to 0.10 μm and the mean roughness surface Sa is a three-dimensional roughness defined by a volume surrounded by a curved surface shape and a mean plane divided by a measured area.