US 7,485,814 B2
Electromagnetic wave shielding filter
Tetsuya Ojiri, Tokyo (Japan); Fumihiro Arakawa, Tokyo (Japan); and Yukihiro Kyoden, Tokyo (Japan)
Assigned to Dai Nippon Printing Co., Ltd., Tokyo (Japan)
Appl. No. 11/794,114
PCT Filed Feb. 24, 2006, PCT No. PCT/JP2006/303378
§ 371(c)(1), (2), (4) Date Jun. 25, 2007,
PCT Pub. No. WO2006/090820, PCT Pub. Date Aug. 31, 2006.
Claims priority of application No. 2005-050144 (JP), filed on Feb. 25, 2005.
Prior Publication US 2007/0291463 A1, Dec. 20, 2007
Int. Cl. H05K 9/00 (2006.01)
U.S. Cl. 174—389  [174/392] 8 Claims
OG exemplary drawing
 
1. An electromagnetic wave shielding filter, comprising:
a meshed layer formed of a meshed electrically conductive material;
wherein a blackened face having micro-irregularities is formed on at least one face of the meshed layer; and
wherein the shape of the micro-irregularities of the blackened face is adjusted to have a probability density curve in which a peak point is convex upward and a horizontal tangent can be drawn at the peak point, the probability density curve being defined as a curve depicted in a graph in which the change of height from the peak value Rp to the bottom value Rv of the micro-irregularities is shown as the horizontal axis while the probability density expressing the distribution of height is shown as the vertical axis.