Coatings In Biomedical Devices

Different type of coating methods are used in the manufacturing and preparation of biomedical device to protect the device from corrosion and complications such as tissue trauma, infection, or even rejection. Many biomedical devices need to be of uniform and fixed thickness in order to function properly. The thickness measurement methods of the coating vary. The most commonly method used (such as weighing a part before and after coating) do not detect incomplete coverage or coating non-uniformities that can lead to device failure
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Thickness Measurement Example

Stents are small tube made of plastic or metal which are inserted within blood vessels to prevent constriction. These stents are treated with a polymer or drug coating to enhance functionality and corrosion-resistance. Using F40 instrument along with 20x objective (25µm spot size), it is able to measure the thickness of these coatings along the outer diameter of a stainless-steel stent. The powerful instrument system is capable of fast and reliable thickness measurements that is non-destructive and requires no sample preparation.

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Microscope that deals with rough and curved surfaces

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Coating Thickness Reading using Filmetrics

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