A METHOD OF SOLDERING

摘要

In a method of soldering the surfaces of a component (11) to a substrate (12), a solder preform (15) is located in the gap between the surfaces. The solder is heated and an over pressure applied to move the surfaces together whilst the solder is molten. Abutments (17) between the surfaces limit the spacing between them. A trapped void (18) is decreased in volume as the pressure is applied. The method is particularly applicable to monolithic microwave integrated circuits (MMIC) and reduces void areas in joints.