Coating and its role in semiconductor & medical devices
As the name suggests, a coating is a special covering which is applied to substrate like semiconductors, medical devices, or various metals in order to improve their surface properties or enhance their efficiency. It can heighten the quality of appearance, adhesion, corrosion resistance, and scratch resistance – all in addition to extending a device’s durability.
Semiconductors, used in the construction of complex and sensitive, precision gadgets (as well as generally used electronic products) also come with requisite coating. This article highlights some basic points in semiconductor coating and medical device coating.
What is a semiconductor?
To put it in simpler words, semiconductor is a material that possesses electrical conductivity ranging in-between that of a conductor and an insulator. It is a vital component of most of our modern-day electronic gadgets. A semiconductors conductivity can be modified as desired by adding certain impurities.
Semiconductor coatings are extensively used in High Voltage insulators or bushings in order to increase the corona inception voltage owing to their ability to relieve high electric fields. The coatings can be of Al2 O3, Si, SiO2, Si3 N4, MgF2 or many other coating substances, or even, impurities.
Medical device coating
Similar to semiconductors, medical devices, often made of stainless steel or other durable and light weight elements, as per their usage are required to exert minimum friction, excellent adhesion and most importantly controllable conductivity and usability tolerance. Most of these features are rendered via suitable medical device coating. Medical devices can range from a single non-ground wire to a multi-shaped, variable sized devices demanding extensive masking. Medical Device coatings can be of various types such as core Teflon wire coating; hypotubes wire coating, et al.
The semiconductor coatings and medical device coatings are measured and tested for the opacity and thickness of film with the help of a drawdown card. Various mask coatings, like waxes, photo-resistors and varnishes can be applied to the grown surface of a processed semiconductor or medical device wafer prior to cleaving it into bars. A right deposition coating onto the semiconductor or medical device also acts as a protective mask for the device or a segment of a complicated device.
About the Author
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