Patent ID: 6768650
Filing Date: 2004-07-27
Classification: H01L,H05K

Abstract:
A discrete decoupling capacitor structure for reducing stray inductance in a circuit structure, which circuit structure includes:a printed circuit board having first and second opposite faces and at least two voltage planes, and vias extending from each of said faces to one of said voltage planes, an TIC chip structure having at least one active device thereon, connectors connecting said active devices on said I/C chip structure to said vias on one face of said printed circuit board, said decoupling capacitor structure comprising: at least two interlaced conductive plates in dielectric material forming at least one capacitor, vias extending from each of said conductive plates through said dielectric material to connect each via to a circuit board via on said second face of said printed circuit board, said vias in said decoupling capacitor structure being parallel to each other and each via connected to one conductive plate being located adjacent a via connected to another conductive plate, wherein said vias in said printed circuit board are arranged in the same pattern as the vias in said decoupling capacitor, said I/C chip structure has vias therein arranged in the same pattern as the pattern of the vias in said decoupling capacitor, and each of said vias arranged in said pattern in said I/C chin structure being connected to active devices.