High-Speed Interconnects: History, Evolution, and the Road Ahead
Vijay Rao Kumbhare, Rahul Kumar, Manoj Kumar Majumder, Somesh Kumar, Punya Prasanna Paltani, Brajesh Kumar Kaushik, Rohit Sharma
Abstract
An integrated circuit (IC), or chip, is a set of electronic circuits and components placed on a tiny planar silicon (Si) semiconductor substrate. These electronics circuits and components are electrically connected to one another with the help of planar and vertical conductor elements known as <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">interconnects</i> . This article presents a detailed overview of the evolution of interconnects, highlighting the technological milestones that have been achieved during the past four decades. Interconnects form the backbone of signal communication among devices on a chip and between chips on a printed circuit board (PCB). The layout and design of interconnects on an IC are vital to the chip’s performance, functionality, reliability, efficiency, and overall fabrication yield.