16 February 2011Manufacturing / Production Technology, Hardware & Services
DEK has launched a brand new stencil coating technology that delivers high performance stencils, in a wipe. The easy-to-apply Nano-ProTek increases cleaning effectiveness and reduces cleaning frequency thanks to a unique proprietary formula that renders the stencil surface ‘fluxophobic’.
As apertures get smaller, the trend impacts negatively on paste release, leading to contamination in the stencil and an increased risk of defects. In addition to driving poorer paste release, smaller apertures also require more frequent cleaning – reducing efficiency and increasing consumables requirements. To overcome these issues, Nano-ProTek forms a chemical bond with the stencil surface to reduce the ability of the flux to stick to apertures and the bottom side of the stencil. Enhancing the capacity of the under stencil cleaner and improving the gasketing of the stencil to the PCB, the result is a substantially greater first pass yield.
Covalently bound to the substrate surface, the technology enables stainless steel or nickel stencils to be cleaned easily for high performance results. The resultant permanent chemical bond is highly stable under ambient conditions. The wipes can be applied to new and existing stencils, can be applied at room temperature by the end user without training and can be re-applied as required.
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