The increased temperatures associated with lead free processes have produced significant challenges for PWB laminates. Newly developed laminates have different curing processes, are commonly filled with ceramic particles or micro-clays and can have higher Tg values. These changes designed to reduce Z-axis expansion and improve the materials resistance to thermal excursions through primary attach and rework operations have also produced harder resin systems with reduced fracture toughness.
First published in the 2012 IPC APEX EXPO technical conference proceedings.
by: John McMahon P.Eng, Brian Gray P.Eng,; Celestica
Sell Your Product by Using the Web as a Research Tool
A few products always seem to sell by themselves online. If they allow for good margins, they are moneymakers. Therefore, those products should be promoted even more through a wide expansion of related terms (different landing pages with each calling for more buying motives).
On the contrary, some "beloved" products may not sell well. The web allows us to test, at almost no expense, different marketing approaches. If after testing all possible approaches, those products still don't sell, invest your love somewhere else, with one restriction: if the web pages for such products are highly visited, then those products can be used as bait.
The SMTnet Power Membership allows you to test different advertising methodologies. This includes includes testing a text ad vs. an image ad with the ability to change your ad on a daily basis (if you wish) to see what works best.
SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore