Gravure offset printing method, gravure offset printing device, and gravure plate

A gravure offset printing apparatus for printing a fine wiring pattern on a material to be printed, the apparatus comprising:

• a blanket configured to be brought into contact with a gravure plate having a groove defined thereon such that the groove corresponds to the fine wiring pattern to offset a printing paste from the groove to the blanket and to be brought into contact with the material to be printed to transfer the printing paste from the blanket to the material to be printed;
• a first moving mechanism configured to move the gravure plate while maintaining the blanket in contact with the gravure plate;
• and
• a second moving mechanism configured to move the material to be printed while maintaining the blanket in contact with 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.

A gravure plate for use in a gravure offset printing apparatus for printing a fine wiring pattern on a material to be printed, the gravure plate having a groove defined thereon such that the groove corresponds to the fine wiring pattern, 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.