Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


0201 and Lead Free

Views: 1922

#65626

0201 and Lead Free | 13 December, 2011

We're soon to build a lead free assembly with 0201 components. I'm not worried about placement as our machines can handle it. Any tips on printing, screens, reflow?

reply »

#65642

0201 and Lead Free | 13 December, 2011

A Study Of 0201’s And Tombstoning In Lead-Free Systems, Phase II Comparison Of Final Finishes And Solder Paste Formulations http://sheaengineering.com/Documents/APEX%2008%200201s%20and%20Tombstoning%20phase%202%20paper.pdf

CONCLUSION The conditions that were varied in this phase of the experiment were component type, padstack, paste volume, paste offset, placement offset, solder paste formulation and PWB final finish. Reflow profile and atmosphere were held constant: ramp profile and air environment. Only two of the four original pad stacks were used. The top four contributors to defect generation were component type, solder paste type, component orientation and padstack dimensions. Final finish was also a factor, with OSP producing 30% fewer defects than ENIG.

reply »

#65648

0201 and Lead Free | 14 December, 2011

Thanks, Dave. Really good article.

reply »

Reflow Oven

PCB X-Ray Inspection