METHOD FOR MANUFACTURING PRINTED CIRCUIT BOARDS Russian patent published in 1995 - IPC

FIELD: electronics. SUBSTANCE: method involves manufacturing of negative matrix from positive one, manufacturing of several copies of positive matrices from the negative one. Positive matrices are arranged in layers alternating by blanks of printed boards with topography from negative of positive matrix. Then metal film on angles of bulges is removed mechanically. It is possible to use semifinished printed boards instead of copies of positive matrix and substrate of printed boards instead of copies of negative matrix. Copies of negative and positive matrices can be manufactured simultaneously with manufacturing of blanks of printed boards. It is possible to produce boards in way that double matrix is produced from positive and negative matrices. Upper part of double matrix follows to negative of positive matrix and its lower part follows positive of negative matrix. Semifinished printed board is used as material for double matrix. EFFECT: increased functional capabilities. 2 cl, 9 dwg