Patent ID: 6239387
Filing Date: 2001-05-29
Classification: G06F,H05K,Y10T

Abstract:
A printed circuit arrangement for shielding a clock signal line with respect to radio-frequency radiation having a predetermined range of wavelengths, said arrangement comprising:a) first and second conductive layers disposed in spaced relation to said clock signal line;b) a plurality of conductive vias interconnecting said first and second conductive layers and disposed adjacent to and in spaced relation to said clock signal line, said conductive vias to each side of the clock signal line being spaced from one another along a length of the clock signal line by a distance selected such that said conductive vias and said first and second conductive layers form a radiation shield that substantially prevents penetration there-through of said radiation; andc) insulation disposed between said first and second conductive layers and said clock signal line, and between said conductive vias and said clock signal line, said distance being less than about one tenth of the shortest wavelength of said predetermined range of wavelengths.