New packaging materials Direct chip interconnection: Ss the printed circuit board coming to the end of its useful life?

摘要

This paper is divided into three main sections. The first part introduces a number of key concepts that underpin the authors' view of direct chip interconnection as a natural stage in the evolution of electronic systems architecture. The second section briefly examines a number of approaches which have given considerable impetus to the move towards direct chip interconnection. In particular, the role of programmable logic and the emergence of three dimensional structures will be examined as enabling techniques. Finally, the authors' own project is detailed and some general conclusions are drawn in an attempt to answer the question 'Is the printed circuit board coming to the end of its useful life?'. Examples relating to computer systems and subsystems and the construction of a solid state PC for embedded applications will be used to illustrate the paper.