Electronic Letters, Vol. Issue2, pp. 98-100, Vol. 40, Issue 2, Jan 22, 2004.

Environmental Aging and Deadhesion of Polyimide Dielectric Films

S. Shahparnia, O. Ramahi
University of Maryland
College Park, MD 20742


A novel concept for ultra-wide-bandwidth suppression of simultaneous switching noise (SSN) in high-speed printed circuit boards (PCBs) is proposed and implemented. This method consists of cascading high-impedance surfaces (HIS) with different stop bands, creating rejection over a wide frequency region. A PCB with the cascaded HIS design has been successfully fabricated and tested.

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