India, April 26 -- What Is Photolithography?

In semiconductor manufacturing, photolithography is a process that uses light to transfer circuit patterns onto a silicon wafer. This creates transistors and other components onto a high-purity semiconductor wafer.

How Does Photolithography Work?

Photolithography works in a series of well-defined steps to transfer a pattern from a design to a silicon wafer. Let's take a closer look:

Surface Preparation: The silicon wafer needs a clean and pristine surface for a photoresist to adhere properly. This may involve cleaning with chemicals or a special plasma treatment.

Photoresist Coating: A light-sensitive liquid photoresist is deposited onto the wafer. This coating is then spun rapidly to crea...