QUALCOMM Incorporated
VARIABLE DIELECTRIC CONSTANT MATERIALS IN SAME LAYER OF A PACKAGE

Abstract:

A package substrate has a dielectric layer and a redistribution metal layer. The dielectric layer has a first dielectric material and a second dielectric material. The first dielectric material is different than the second dielectric material. The second dielectric material may have a dielectric constant that is either greater than or less than the dielectric constant of the first dielectric material. The second dielectric may be selected based on a specific target application such as single-ended signal routing or serializer/deserializer (SERDES) routing.