Heterogeneous organic laminate stack ups for high frequency applications

Abstract

Organic laminate stack ups are disclosed for a variety of applications, including high frequency RF applications. One or more inner core layers may be disposed between outer layers along with bondply or prepreg layers as needed. Discrete devices, including surface mount components and flip chips, may be embedded within the organic laminate stack up structures. The embedding of the discrete devices, which may be active or passive devices, may be in the form of a layer of bondply or prepreg encapsulating the discrete devices. In addition or in the alternative, cavities may be formed in at least the outer layers for housing discrete devices, which include surface mount components, flip chips, and wire bonded integrated circuits. A variety of caps may be utilized to seal the cavities. Further, shielding may be provided for the organic laminate stack up structure, including through a wall of vias or a plated trench cut along at least one side of the stack up structure. Each stack up structure may be packaged in a variety of ways, including as a surface mount component, ball grid array, or land grid array.