发明名称 Printed circuit board with vias at fixed and selectable locations
摘要 A printed circuit board for electric circuits is formed of plural layers of electrical conductors and includes through holes and vias arranged in a regular pattern along points of a grid laid out along othorgonal axes of a Cartesian coordinate system. Electrical components such as circuit chips and discrete components are to be mounted to the through holes, while the vias connect electrical conductors of different layers. Conductors of a layer are grouped together as multiple-conductor channels which are routed among the through holes and the vias to make electrical connections among the electrical components. An additional via can be entered in a central portion of a grid cell by rerouting conductors of channels in the cell through arcuate segments, thereby permitting connection between conductors of channels on different layers while preserving the original grid pattern of through holes and vias.
申请公布号 US4700016(A) 申请公布日期 1987.10.13
申请号 US19860863850 申请日期 1986.05.16
申请人 INTERNATIONAL BUSINESS MACHINES CORPORATION 发明人 HITCHCOCK, ROBERT B.;KELLERMAN, EDUARDO;KOONS, JOHN P.
分类号 H05K1/02;H05K1/00;H05K1/11;H05K3/46;(IPC1-7):H05K1/00 主分类号 H05K1/02
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