Hydrophilic surface properties are needed in many different applications ranging from biomedical devices to marine engineering.
One of the main challenges in PCB manufacturing is the adhesion of the conformal coating. Contact angle measurements can be used to predict adhesion.
HMDS is used to render the surface of silicon more hydrophobic and thus to match better with the chemistry of the photoresist.
One should always measure the advancing and the receding contact angle to get the true picture of the surface wettability.
Adhesion problems are one of the main reasons for the failure of the product. Read to find out how contact angle measurements can help solve the problem.