Materials Science Methods

Radiocarbon dating

Radiocarbon dating is a technique to estimate the age of an organic object. The technique initially was developed by the american chemist Willard Libby in 1940. The idea behind radiocarbon dating is very simple. In nature, carbon exists as three different… Read More ›

Optical Lithography

Optical lithography (photolithography) is a key process in microfabrication for transferring a geometrical pattern to a thin film substrate. The optical lithography mainly includes: wafer cleaning, photoresist spin-coating, soft backing, mask alignment and exposure, photo resist developing, hard backing, etching and finally… Read More ›