Questions of designing of printed-circuit boards for systems of high speed are considered. The basic attention is given maintenance of signal integrity in standard lines TTL/CMOS and in differential pairs. Physical aspects of decrease in level of hindrances in details understand chains of ultrafast devices. Base data on materials for printed-circuit boards, their properties and influence on quality of a signal are resulted. In the book practical recommendations to design designing of PCB electronics are given. The statement is accompanied by the big number of examples and numerical calculations. The stated material has a practical orientation and is focused, first of all, on developers and designers of electronic equipment. The book will be useful to the technical experts, occupied in research, industrial and other spheres of creation of electronic means. It is possible to recommend the edition as the manual to bachelors, masters and post-graduate students of corresponding directions of preparation.