This book addresses the problems faced by engineers who design and develop electronic equipment on a small scale for a wide variety of applications. Designing and fabricating devices on a very small scale (microchips, micromechanisms) requires specialized knowledge of the physics and analytical techniques. The fundamental physics are the same for the small scale as in the large but the properties of the materials used becomes a major consideration of design and must be accounted for (eg. vastly different expansion and contraction ranges of connected materials, oxide coatings which become a significant portion of the device, fabrication difficulties).