Cleanliness of Stencils and Cleaned Misprinted Circuit Boards

摘要

The effectiveness of cleaning stencils and misprinted/dirty printed circuit boards can be effectively monitored. This can be done by washing known clean circuit boards and then checking to see if they have stayed clean as a result of the washing process. The monitoring can be done with conductivity equipment. Control limits can be set once enough initial data is collected. Correlations between machine maintenance and the volume of boards washed could be determined.