Patents by Inventor Lev A. Seliverstov

Lev A. Seliverstov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multilayer printed circuit board and method of manufacturing same
    Patent number: 5414224
    Abstract: A metal base (1), and holes (12) therein, of a printed circuit board are given an insulating coat (2) produced from an epoxy compound in particulate form which is deposited and machined successively at either side. An insulating topology (16) in a photoresist imposed on the insulating coat (2) is metal-plated in vacuum. On removing the metal from the prominent portions of the topology (16) tracks (4) and connecting pads (5) of a layer (3) of conducting pattern are left. An insulating topology (18) consistent with the disposition of connecting pads (11) and connecting posts (10) interconnecting the layers (3, 6) of conducting patterns is formed and metal-plated. On removing the metal from the prominent portions an insulating layer (9) with connecting posts (10) and connecting pads (11) is left. Next, an insulating topology (19) consistent with the topology of the layer (6) of conducting pattern is formed and metal-plated.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: May 9, 1995
    Assignee: Filial Vsesojuznogo Nauchno Issledovatelskogo Instituta
    Inventors: Vladimir I. Adasko, Arnold K. Vardenburg, Alexandr L. Emelyanov, Lev A. Seliverstov, Viktor L. Emelyanov, Alexandr D. Slonimsky, Nikolai A. Sklyarov, Vladimir I. Tikhonov, Jury F. Rogozhin, Pogos M. Piliposian