ELECTROMAGNETIC WAVE SHIELDING MATERIAL

PROBLEM TO BE SOLVED: To prevent adverse effect on the product quality by preventing the line width of a conductive convex pattern layer formed by the "drawing primer system intaglio printing method" from becoming thicker when the print speed is increased in order to highly reconcile the electromagnetic wave shielding performance and the optical transparency of an electromagnetic wave shielding material. SOLUTION: A conductive convex pattern layer 3 containing conductive particles and binder resin and having many openings 4 formed in the non-formation part of the conductive convex pattern layer 3 is laminated on a transparent substrate 1 with a primer layer 2 interposed therebetween, where the primer layer is thicker in the formation part of the conductive convex pattern layer than in the non-formation part thereof. In such an electromagnetic wave shielding material 10, inclination of the slope in the shape of main cutting surface of a protrusion is differentiated on the opposite sides of the top. Assuming one inclination angle of the slope measured from the outside is θL, and the other inclination angle is θR, following relation is satisfied; θL>θR≥90°. The θRcorresponds to the downstream side of printing and, preferably, θR=90-110°. COPYRIGHT: (C)2011,JPO&INPIT