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Pb-free Impact on PCB Purchasing

Authored on: Jan 1, 2010 by Zulki Khan

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To date, volumes have been written about the European Union's (EU) directive on Restrictions on Hazardous Substances (RoHS), WEE, and requirements for lead-free (Pb-free) products. You can go to virtually any search engine and put in the words, "Pb-free requirements" or "RoHS" and get a considerable amount of definitions, analysis, and general articles. So, rather than re-inventing the wheel, we'll concentrate on basic information you, as a buyer or purchasing agent, can use to make your life easier. The following information helps you to understand some of the key particulars involved in selecting Pb-free PCBs and their associated costs.
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STEVEN.KARTY Posted Sep 30, 2010

What do you do about the tin whiskers that will eventually grow and cause short circuits? The only way to prevent tin whiskers is to re-tin all the components' conductors with conventional tin-lead solder before they are soldered onto the board with conventional tin-lead solder, but this is very expensive. DoD and NASA still prohibit unleaded solder in anything built especially for them because they don't want tin whiskers knocking-out their systems.

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