| CPC B41F 13/11 (2013.01) [B41F 21/08 (2013.01); B41F 27/1281 (2013.01)] | 1 Claim |
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1. A gravure printing plate for gravure-printing a wiring pattern with conductive ink including silver particles, the gravure printing plate comprising:
a groove to be filled with the conductive ink by a doctor blade squeegeeing the gravure printing plate in a predetermined squeegeeing direction, the groove having two parallel sidewalls and a bottom extending between the two parallel sidewalls; and
a bump standing on the bottom of the groove, the bump having a top face located in the groove, wherein
the bump consists, when viewed in the predetermined squeegeeing direction, of a front portion close to the doctor blade heading for the groove, and a rear portion being a remaining portion thereof,
the front portion of the bump has a shape of a half cylinder and face neither of the two parallel sidewalls within a range of smaller than six micrometers in front, in the predetermined squeegeeing direction, of the front portion,
the rear portion of the bump has a shape different from the shape of the front portion of the bump,
the bump consists, when viewed in a direction in which the two parallel sidewalls face each other, of a first portion apart from one of the two parallel sidewalls by a minimum interval between six micrometers and fifteen micrometers inclusive, and a second portion, being a remaining portion thereof, either abutting the other of the two parallel sidewalls to have a planar boundary therebetween or apart from the other of the two parallel sidewalls by a minimum interval not smaller than fifteen micrometers,
the first portion of the bump has a shape of a half cylinder, and
the second portion of the bump has a shape different from the shape of the first portion of the bump.
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