Patent ID: 9457558
Filing Date: 2016-10-04
CPC Classification: B41F,B41M

Claim Text:
1. A gravure offset printing method for printing a fine wiring pattern on a material to be printed, the method comprising: a filling step of filling a groove defined on a gravure plate such that the groove corresponds to the fine wiring pattern with a printing paste; after the filling step, an offset step of bringing a blanket into contact with the gravure plate to offset the printing paste from the groove to the blanket; and after the offset step, a transfer step of bringing the blanket into contact with the material to be printed to transfer the printing paste from the blanket to the material to be printed, wherein the groove comprises a region having a width of 100 to 700 μm in a direction perpendicular to a print direction, the region has in the print direction a leading end tapered forward in the print direction, and the region has in the print direction a trailing end split into a pair of branches by a notch tapered forward in the print direction, each branch being tapered backward in the print direction, wherein the relational expression a <0.23w+13.6 is satisfied, where a (°) is the angle between two sides defining the shape of the leading end, and w (μm) is the width of the region, and the relational expression b <90 is satisfied, where b (°) is the angle between two sides defining the shape of the notch.