EPT Embedded Passive Technology Materials Design and Process
A summary of resistor material selection, evaluations and duplication of a complex digital design. Using EPT, passive components may be embedded into the substrate directly under active devices such as ASICs. The shorter distance between the embedded passives and active components reduces parasitic losses associated with surface-mounted passives, resulting in better signal transmission and less crosstalk. Lower loss and lower noise yield an improvement in electrical signal performance, especially at high frequencies. Passive components account for 80 to 95% of the total number of components and cover over 40% of the surface of the PCB.
Link: http://pcdandf.com/pcdesign/index.php/magazine/9801-component-processing-1501