公开(公告)号：US3649475A

公开(公告)日：1972-03-14

申请号：US3649475D

申请日：1969-07-22

Applicant: GEN DYNAMICS CORP

Inventor： DEGNAN JOSEPH F ,  AYOTTE ROBERT A

IPC: H01P3/08 ,  H05K1/02 ,  H05K1/03 ,  H05K3/38 ,  H05K3/42 ,  H05K3/46 ,  C23B5/48 ,  B44D1/18

CPC classification number: H01P3/085 ,  H01P3/088 ,  H05K1/024 ,  H05K1/032 ,  H05K3/386 ,  H05K3/429 ,  H05K3/4652 ,  H05K3/4655 ,  H05K3/4697 ,  H05K2201/015 ,  H05K2201/0195 ,  H05K2201/0715 ,  H05K2203/068 ,  Y10T156/1052

Abstract: A MULTI-LAYER PRINTED CIRCUIT BOARD FOR USE IN MICROWAVE FREQUENCY CIRCUITS IS DESCRIBED. THE BOARD HAS AT LEAST A PAIR OF PRINTED CIRCUIT BOARDS HAVING POLYTETRAFLUORETHYLENE SUBSTRATES, ONE OF WHICH IS SINGLE SIDED AND THE OTHER OF WHICH IS DOUBLE SIDED. ONE CIRCUIT OF THE DOUBLE SIDED BOARD PROVIDES AN INTERNAL LAYER OF THE MULTI-LAYER BOARD. THE OUTER LAYERS FORM GROUND PLANES SUCH THAT STRIPLINE

CIRCUITS ARE PROVIDED FOR CONNECTION TO MICROWAVE CIRCUIT COMPONENTS. THE PROCESS INCLUDES STEPS FOR LAMINATING THE BOARDS TOGETHER PROVIDING PLATED THROUGH HOLES WHICH PERMIT POLYETRAFLUORETHYLENE TO BE USED IN A MANNER COMPATIBLE WITH MICROWAVE CIRCUIT REQUIREMENTS.

公开(公告)号：US3654097A

公开(公告)日：1972-04-04

申请号：US3654097D

申请日：1969-07-22

Applicant: GEN DYNAMICS CORP

Inventor： DEGNAN JOSEPH F

IPC: H05K3/42 ,  H05K3/46 ,  C23B5/48 ,  B41M3/08 ,  B44D1/18

CPC classification number: H05K3/4611 ,  H05K3/428 ,  H05K3/4626 ,  H05K2203/068 ,  Y10T428/298 ,  Y10T428/31674

Abstract: INCLUDE A VINYL PHENOLIC GLASS CLOTH LAYER WHICH IS LAMINATED ON ONE SIDE. ALSO DURING THE PROCESS AN ACRYLIC RESIN PROTECTIVE COATING IS APPLIED WHICH TOGETHER WITH THE VINYL PHENOLIC LAYER, PROVIDES SELECTIVELY REMOVABLE MASKS WHICH FACILITATE REMOVAL OF ELECTROLESS SURFACE PLATING ON EXPOSED CIRCUIT FACES AND DRILLING HOLES THROUGH THE BOARDS. THEREAFTER, PLATED CONNECTIONS ARE PROVIDED VIA THE HOLES BETWEEN THE CIRCUITS ON THE BOARDS.

IMPROVED METHODS OF FABRICATING MULTILAYER PRINTED CIRCUIT BOARDS ARE DESCRIBED WHEREIN AT LEAST ONE EXPOSED CIRCUIT FACE IS PREFABRICATED BEFORE THE BOARDS ARE LAMINATED TOGETHER BY MEANS OF A NON-FLOWING "B" STAGE EPOXY GLASS SHEETS AND IN A FIXTURE HAVING FLOWABLE MATERIAL CONFINED ON OPPOSITE SIDES OF THE PACKAGE (VIZ THE LAYERS TO BE LAMINATED), THEREBY PERMITTING THE USE OF SUCH NONFLOWING MATERIAL WHICH REDUCES SHRINKAGE, IMPROVES LAMINATION QUALITY, MAINTAINS REGISTRATION AMONG THE BOARDS, AND SIMPLIFIES FIXTURING. THE LAMINATION PACKAGES MAY ALSO