Patent ID: 6816041
Filing Date: 2004-11-09
Classification: H01L

Abstract:
A method of interfacing 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 a MMIC chip, at least one microwave monolithic integrated circuit (MMIC) received through the opening, and a metallic carrier having a coefficient of thermal expansion (CTE) that is not matched with the ceramic substrate and the MMTC and secured to the dielectric substrate comprising the steps of:forming a pedestal on the carrier on which the MMIC chip is received for connection to the radio frequency circuits and microstrip lines; segmenting the carrier with stress relief portions to form subcarriers; and bonding the carrier with the dielectric substrate by an adhesive positioned at an area defined by the subcarriers such that the stress relief portions and formed subcarriers provide stress relief during expansion and contraction created by temperature changes.