METHOD OF TRIPLE BACKUP OF INTERCONNECTIONS Russian patent published in 2020 - IPC H04B15/02 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the design of printed circuit boards, specifically to methods of their redundancy. For this purpose, the chain redundancy method includes arrangement and routing of the redundant and backup circuits so that the redundant circuit layout and routing are performed on the upper layer of the substrate, the signal conductors are performed by means of gaps in the support conducting plate, and the backup circuit layout and routing are made on the substrate lower layer in a mirror manner to the upper layer, redundant and reserve signal conductors of the same circuits are arranged one under the other, and the remaining conductors are electrically connected to each other, wherein the signalling like circuits are laid by two pairs, parallel to each other, on the upper and lower layers, wherein the upper layer pair is arranged in a mirror manner to the lower layer, so that any of four conductors can be used as a reserved conductor, and other three conductors may be reserved for it.

EFFECT: technical result is possibility of 3-fold redundancy, layout and routing of backup circuit in same layer as reserved circuit and reduction of susceptibility of redundant circuit to external conductive actions.

1 cl, 1 dwg