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56 SMT Magazine • July 2014 figure 10: Scanning electron micrographs detailing the concentration of tin whiskers on the surface of tin coated solid singled strand wire following five years of exposure to 50°C / 50% relative humidity. figure 11: Scanning electron micrographs detailing the characteristic appearance of tin whiskers on the surface of tin coated solid singled strand wire following five years of exposure to 50°C / 50% relative humidity. fEATURE TIN WHISKER RISK MANAGEMENT By CoNFoRMAl CoATING continues