| 摘要 |
PROBLEM TO BE SOLVED: To provide a letterpress for printing that produces high-definition printing pattern required for organic EL, etc. and realizes uniform print transfer within a plane.SOLUTION: A letterpress for printing is obtained by forming a projection type pattern as a unit pixel on one side of a base material. When a width of a lower end part on a side making contact with the base material is regarded as a width a', a width of an upper end part on a side making contact with a print ink as a width a, an interval with a lower end part of a neighboring projection type pattern as an interval b, and a distance from the upper end part to the lower end part of the projection type pattern as a height d, a cross-sectional shape of the projection type pattern satisfies: the width a of the upper end part<the width a' of the lower end part; the height×0.5≤the width a of the upper end part≤the height d×1; the width a' of the lower end part+the interval b with the lower end part of the neighbouring projection type pattern≤150 μm; and the height d≤50 μm. The projection type pattern is an independent pattern not connected to a neighboring projection type pattern. |
