International Business Machines Corporation

Simone Rehm

Erich Klink

Bruce John Chamberlin

Wiren Dale Becker

Roland Frech

Thomas-Michael Winkel

Wai Mon Ma

William Frederick Shutler

Gisbert Gerhard Thomke

Bernd Garden

Helmut Virag

Disclosed is a multilayer electronics packaging structure, especially for use in a multi chip module. By forming an overlap of signal conductors by the respective mesh conductors, an improved shielding effect is achieved and coupling between signal conductors is reduced. By increasing the via punch pitch such that multiple wiring channels are formed between adjacent vias, wirability is improved and the number of signal distribution layers may be reduced. The new structure thus shows improved electrical properties over the state-of-the-art structures, combined with a cost reduction of about 35%.

MCM&mdash;MLC technology

Described is a method for minimizing switching noise in the high- and mid-frequency range on printed circuit cards or boards by means of a plurality of surface mounted decoupling capacitors. A novel configuration and implementation of capacitor pads including the connecting vias is also presented. As a result the parasitic inductance of the pads and vias can be significantly reduced. Thus the effectiveness of the decoupling capacitors in the mid and high frequency range can be increased, the voltage drop can be reduced and the system performance can be increased. Several design rules for the new pad via configuration lead to the significant reduction of the parasitic inductance. The proposal is especially important for high integrated system designs on boards and cards combined with increased cycle times.

Method and structure for reducing power noise

Growing community of inventors

Ehningen, Germany

Simone Rehm