Photonic Processes

FEATURE

Lasers on board

Nick Morris traces photonic processes in the electronics manufacturing industry

In 1974 the Intel 8080 chip held a few thousand transistors, while the smallest feature on the chip was about 6µm across. Thirty years later, the latest Pentium processor holds more than 100 million transistors – the smallest component is almost 100 times smaller than on the 8080. Photonics materials processing has enabled these advances.

Electronics manufacturing process contains a number of steps, each of which has spawned its own supporting industry. Different manufacturers use different methods, and it would be impossible to discuss all possibilities and permutations. Instead, let us trace the process of semiconductor fabrication to see how photonics is being used at various steps.