×

Post processing shielding

  • US 5,446,243 A
  • Filed: 02/23/1994
  • Issued: 08/29/1995
  • Est. Priority Date: 05/20/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for reducing coupled noise in a multilayer circuit board having a plurality of signal lines disposed within a set of wiring channels on each of a plurality of layers, the wiring channels being greater in number than the number of signal lines;

  • and, a plurality of vias disposed within a set of via channels and traversing the layers and connecting the signal lines into electrical nets, the via channels being greater in number than the number of bias;

    said method for reducing coupled noise comprising the steps of;

    determining the locations of unused ones of the wiring channels and unused ones of the via channels;

    providing shield lines disposed within the unused wiring channels and unused via channels; and

    ,electrically interconnecting the shield lines with one another and to a reference voltage so as to electromagnetically shield at least one of said nets.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×