Patent ID: 6037192
Filing Date: 2000-03-14
Classification: H01L

Abstract:
A method of assembling an integrated circuit component, comprising a component body and a plurality of electrical terminals carried by the component body, onto a substrate comprising:locating the integrated circuit component in position spaced from a desired site area for the component upon the substrate with an uncured polymer adhesive disposed between the body of the component and the site area, the uncured polymer adhesive having fluxing properties and, after curing, having an adhesive strength of at least 50 mPa, sufficient rigidity to hold the integrated circuit component as part of a rigid structure together with the substrate, and temperature controlled volumetric change greater than that of the solder to be used to join terminals of the component to terminals of the substrate;relatively moving the integrated circuit component and the substrate to bring the component towards the substrate and into a desired location upon the site area while compressing the uncured polymer adhesive between the body of the component and the substrate to displace the adhesive outwardly from between the body of the component and the substrate, and limiting the minimum distance apart of the body of the component and the substrate; andwith the adhesive retaining the integrated circuit component in its desired location, applying heat;a) to reflow solder to provide terminal connections between the component and the substrate while the flux in the polymer adhesive provides an oxide cleaning action to enable soldering between terminals to occur; andb) to cure the polymer adhesive to provide it with its required properties.