If there is just one thing common for all aspects of semiconductor and electronic manufacturing that causes problems wherever it raises its head, it is electromagnetic interference – EMI. Unwanted high-frequency signals on power lines, ground, internal tools’ wiring, and in the air can cause equipment malfunction and parameters’ errors, affect precision, introduces data and test errors, and can damage sensitive devices. In this presentation we will look into the most common causes of EMI, how it affects semiconductor manufacturing environment, how to mitigate EMI, and how SEMI Standards on EMI help to make semi manufacturing more efficient. We will examine the most prolific sources in semiconductor manufacturing, namely servo motors, switched mode power supplies, lasers, WiFi and others. We will look into the way EMI propagates throughout the FAB. We will learn about worldwide standards governing EMC (Electromagnetic Compliance) and the specific gaps between the generic standards and the specific requirements of semiconductor manufacturing. We will learn what SEMI Standards are doing to help semiconductor manufacturers to improve their productivity and device yield. The author is an EMC Task Force Leader in SEMI Standards – the key developments in these standards will be explained in details.