CSP Conversion Improves Cost, Quality, Reliability

摘要

Replacing a chip on board (COB) component with a chip-scale-packaged (CSP) component resulted in measurable improvements in quality and reliability of a pencil-size bar code reader. Manufactured by the Hand Held Products Div., Welch Allyn, Inc., the electronics are built on a FR4 substrate that holds two integrated circuits, and several passive components. One of the ICs is small enough in its surface mount package to fit into the available pencil-shaped envelope, as are the passive components.