MANUFACTURING METHOD OF TWO-SIDED FLEXIBLE PRINTED BOARD Russian patent published in 2015 - IPC H05K3/10 H05K3/22 H05K3/36 H05K3/40 H05K3/46 

FIELD: technological processes.

SUBSTANCE: invention relates to instrument making and radio electronic engineering and can be used in the production of flexible printed boards used in the manufacture of secondary converters of micromechanical accelerometers, microgyroscopes, integral pressure sensors and other items. In a manufacturing method of a two-sided flexible printed board, which consists in the fact that to a metal plate on both sides there applied is an aluminium layer and further on both sides there applied is a metal resistive electrically conductive coating; photolithography is performed on both sides; marks of transient holes are a mirror reflection of both sides; after that, the aluminium coating is etched away simultaneously from both sides, and then, the flexible printed boards are separated on both sides from the metal plate and they are attached to each other by means of a polymer layer.

EFFECT: improving positioning accuracy, identity of obtaining elements of two flexible printed boards, their further alignment and connection to obtain the two-sided flexible printed board and shortening the technological cycle.