Gold is commonly used for sputtering in various industries, particularly in the semiconductor industry, due to its excellent electrical and thermal conductivity. This makes it ideal for coating circuit chips, boards, and other components in electronics and semiconductor production. Gold sputtering allows for the application of a thin layer of single-atom gold coating with extreme purity.
One of the reasons gold is preferred for sputtering is its ability to provide a uniform coating or create custom patterns and shades, such as rose gold. This is achieved through fine-grain control of where and how the gold vapor deposits. Additionally, gold sputtering is suitable for materials with high melting points, where other deposition techniques may be challenging or impossible.
In the field of medicine and life sciences, gold sputtering plays a crucial role. It is used to coat biomedical implants with radiopaque films, making them visible in X-rays. Gold sputtering is also used to coat tissue samples in thin films, allowing them to be visible under scanning electron microscopes.
However, gold sputtering is not suitable for high-magnification imaging. Due to its high secondary electron yield, gold tends to sputter rapidly, but this can result in large islands or grains in the coating structure, which become visible at high magnifications. Therefore, gold sputtering is more suitable for imaging at low magnifications, typically under 5000x.
Overall, the excellent conductivity, ability to create thin and pure coatings, and compatibility with various industries make gold a preferred choice for sputtering in applications ranging from semiconductor production to medicine and life sciences.
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