Tungsten needles can be coated with other materials for specific applications. Coatings can provide additional properties such as improved lubrication, enhanced durability, increased electrical conductivity, or resistance to specific types of corrosion.
Some examples of coating materials that can be used on tungsten needles include diamond-like carbon (DLC) coatings, which are hard and wear-resistant, and gold coatings, which provide excellent electrical conductivity and corrosion resistance.
In the semiconductor industry, tungsten needles are often coated with thin films of platinum or gold to improve their electrical conductivity and reduce the risk of contamination during use. Tungsten needles used in medical applications may also be coated with biocompatible materials to reduce the risk of adverse reactions when in contact with bodily fluids or tissues.
The specific coating material and thickness will depend on the intended application and the specific properties desired. Coating tungsten needles can help extend their lifespan and improve their performance in certain applications.
