PRINTED CIRCUIT BOARD WITH A SCREEN

摘要

PURPOSE: A printed circuit board which includes a screen is provided to improve electromagnetic compatibility(EMC) of an entire circuit board by arranging the screen between partial circuits which are sensitive to EMC interference. CONSTITUTION: A carrier plate(4) has an upper surface(6) and a lower surface(8). An electric circuit(12) comprises a first conductor track surface(10a) and a second conductor track surface(10b) separated from the first conductor track surface. The electric circuit occupies one or more parts(18) of the carrier plate. A printed circuit board(2) comprises a screen(20) which isolates the circuit from indirect electromagnetic radiation. The screen is arranged on the first conductor track surface. A first screen conductor track(22a) confines the part in a closed mode. A second screen conductor track(22b) is arranged on the second conductor track surface. The first screen conductor track and the second screen conductor track are mutually matched at least on a peripheral region(24). The screen penetrates the carrier plate on the peripheral region.