Patent ID: 6653916
Filing Date: 2003-11-25
Classification: H01L

Abstract:
A microwave monolithic integrated circuit (MMIC) assembly comprising:a dielectric substrate having a surface on which radio frequency circuits and microstrip lines are formed and at least one MMIC chip opening dimensioned for receiving therethrough a MMIC chip; a metallic carrier having a mismatched coefficient of thermal expansion to the dielectric substrate, and a component surface which is secured to the dielectric substrate on the surface opposing the radio frequency circuits and microstrip lines, and having at least one raised pedestal on the component surface that is positioned at the MMIC chip opening; a MMIC chip secured on the pedestal and extending through the MMIC chip opening for connection to the radio frequency circuits and microstrip lines; and stress relief portions formed in the metallic carrier that segment the carrier into subcarriers and provides stress relief during expansion and contraction created by temperature changes.