Method for making multichip module substrates by encapsulating electrical conductors

摘要

A method for making a multichip "HDI" module includes the step of making a substrate for supporting the semiconductor or solid-state chips by applying electrical conductor in a pattern to a first dielectric sheet, and applying encapsulating material to the electrical conductor. Apertures are made in the first dielectric sheet at locations at which the chips are to be located. The chips are affixed to a second dielectric sheet at locations registered with the apertures in the first sheet, and the sheets are juxtaposed with the chips extending into the apertures. Electrical connection is made to the pads of the chips by means of a multilayer structure of dielectric sheets with conductor patterns, interconnected by means of plated-through vias.