Patent ID: 6498551
Filing Date: 2002-12-24
Classification: H01L

Abstract:
A millimeter wave (MMW) module for microwave monolithic integrated circuit (MMIC) comprising:a carrier board formed of a dielectric material and having at least one MMIC mounted thereon and at least one interface line; a base plate formed of a material that has a higher, unmatched coefficient of thermal expansion (CTE) than the carrier board and supporting same; a housing mounted over said carrier board and engaging said base plate, said housing having at least one subminiature coaxial connector interface mounted thereon; a flexible circuit interconnect connecting said subminiature coaxial connector and MMIC die through said interface line; and a thermal interface member positioned between said carrier board and base plate to aid in heat transfer between said base plate and housing and said lower CTE carrier board and being formed of a material that establishes a floating non-mechanically attaching interface between the carrier board and base plate, allowing relative movement and greater compensation for CTE mismatch.