Patent ID: 6579423
Filing Date: 2003-06-17
Classification: B32B,C03C,C23C,G02B,H01J,H05K

Abstract:
A process for producing a light-transmitting electromagnetic wave filter comprising a transparent substrate having on one side thereof a light-transmitting electromagnetic wave shield film comprising 2n+1 (n&gE;1) layers in which at least two dielectric layers comprising an antistatic metal oxide layer and at least one silver layer are alternately laminated with each other with the dielectric layer being the first to be provided on the transparent substrate,wherein said silver layer is formed by sputtering using silver as a target, and said antistatic metal oxide layer is formed by sputtering using, as a target, a metal oxide whose sheet resistance is 50 &OHgr;/or less, and further wherein (i) a barrier layer is provided as an intermediate layer of a metal oxide layer, or (ii) a barrier layer is provided as an intermediate layer of a metal oxide layer and a barrier layer is provided on an outer side of a metal oxide layer constituting an outermost dielectric layer.