Viscosity measurements in the printed circuit board (PCB) coating process

The dosage of a coating solution for printed circuit boards requires precise adjustment to achieve uniformity of coating application. A constant viscosity reflects that uniformity. An inhomogeneous coating, or too thick or thin a coating in the production of printed circuit boards, can cause serious problems. A company's reputation is at stake when too many customer complaints arise due to poor quality of the final product. Consequently, costs increase due to inefficient production and raw material losses.

By installing a MIVI process viscometer in the circulation loop of the coating process, the right amount of solvent can be injected into the base resin at the right time during the entire production process.

The MIVI viscometer operates continuously and detects and corrects any viscosity variation immediately.

Use of the MIVI viscometer in the coating process of printed circuit boards

The circuit boards are immersed in a resin-based coating that solidifies at room temperature. The 100% achieves coating uniformity when it comes to quality, thanks to the inline viscosity measurement. The viscosity measurement also enables a reduction of resin and solvent consumption. The MIVI viscosity measurement ensures a constant coating viscosity. It increases the repeatability of the process, the homogeneity and uniformity of the coating and ensures material and time savings.

More information about the viscosity measurement of coatings for printed circuit boards?

Download the fact sheet here, or contact Inventech's product managers.