SMT Stencil Cleaning Roll Tape Test
A quick determination of a stencil wiping roll’s ability to withstand fiber detachment and consequent contamination of circuit boards during the printing process The goal of this test is to select an SMT stencil cleaning roll that is free of weak linty paper fibers that can break ways. Using a lint-free roll such as the GREEN MONSTER can help prevent damage to equipment, defects, bridges, blocked apertures, low transfer efficiency, and solder contamination. Contaminated PC boards are a common problem. While the contamination itself is often thought of as a mystery, the cause may actually come from the stencil wiping roll itself. This is largely due to the sticky solder paste and sharp edges of the stencil’s apertures. The stencil wiping roll is supposed to clean the stencil in an attempt to prevent contamination. However, some stencil wiping rolls often leave behind pieces of its material on the stencil, subsequently contaminating the PC board. When these contaminants ...