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TopLine_2017

Lead Free Boards RoHS Compatible TopLine offers Lead Free boards with 4 popular finishes compatible with RoHS. Comparison of Lead Free Finishes Description Advantages Concerns Comparison of Standard Finishes (with Pb) 67 Sn Immersion Tin • Low Cost • Potential Whisker (also known as White Tin) • Widely Accepted • Microscopic Voids • Re-workable • Good Flatness • Good Shelf Life Ag Immersion Silver • Low Cost • Shelf Life • Widely Accepted • Tarnishing • Re-workable • Excellent Flatness • Excellent Wetting OSP Organic Solderability • Low Cost • Shelf Life Cu Preservative • Widely Accepted • Degrades with Temperature Entek CU106 or CU56 • Re-workable • Handling Sensitivity • Excellent Flatness • Flex Sensitive Ni-Au Electroless Nickel • Widely Accepted • Added Cost Immersion Gold • Excellent Flatness • Difficulty with rework (Also known as ENIG) • Very Long Shelf Life • More brittle solder joints Description Advantages Concerns Sn/Pb Hot Air Solder Level • Low Cost • Flatness (Coplanarity) (also known as HASL) • Widely Accepted • Paste Misprints • Re-workable • Not RoHS Compatible • Good Shelf Life


TopLine_2017
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