公开(公告)号：DE3408046A1

公开(公告)日：1984-12-13

申请号：DE3408046

申请日：1984-03-05

Applicant: IBM

Inventor： BREWER JAMES ARTHUR ,  LANGGOOD JOHN KENNEDY ,  MARKHAM HARVEY ROSSEN

IPC: H05K9/00 ,  H05K1/00 ,  H05K1/02 ,  H05K3/46

Abstract: In a printed-circuit board which consists of six layers, the first, third and sixth layers are used as carrier layers for lead connections between the components of a personal computer. The second and fifth layers are two earthing planes which together reduce the electromagnetic interference produced by the densely packaged components and leads. The remaining fourth layer is a voltage plane. The two earthing planes are adjacent to the two signal-line planes which are located furthest towards the outside. A third signal-line plane and a voltage plane are located between the two earthing planes.