Patent ID: 6569711
Filing Date: 2003-05-27
Classification: H01L

Abstract:
A method for connecting electronic components, comprising the steps of:providing an integrated circuit chip substrate material having a first coefficient of thermal expansion; providing an organic dielectric substrate material having a second coefficient of thermal expansion; providing a thermoplastic material having a third coefficient of thermal expansion and comprising a thermotropic liquid crystalline polyester; fabricating an integrated circuit chip with said integrated circuit chip substrate material; fabricating a circuitized organic dielectric substrate with said organic dielectric substrate material; projecting an array of solder members from a surface of the chip; and electronically connecting said projecting solder members on said chip to said circuitized organic substrate; wherein the step of fabricating the circuitized organic dielectric substrate further comprises the step of incorporating a layer of the thermoplastic material, wherein the incorporation of the thermoplastic layer having a third coefficient of thermal expansion produces an aggregate substrate fourth coefficient of thermal expansion for the circuitized organic dielectric substrate, and wherein a difference between the aggregate fourth coefficient of thermal expansion and the first coefficient of thermal expansion is less than a difference between the first coefficient of thermal expansion and the second coefficient of thermal expansion.