Lead-Free BGA Rework-Transition Issues

Published:

August 16, 2007

Author:

Best Inc

Abstract:

While experienced inspectors may be able to determine the aesthetic differences between a lead-free PCB assembly and a tin-lead version, one cannot rely on the "experienced eye". "Less wetting out to the pad edges" (Figure A) and "graininess and lack of shininess of the solder joint" (Figure B) are typical comments about some lead-free solder joints. However, in cases where a Nitrogen atmosphere was present during the reflow of the solder joint (Figure C), there will be little visual differences between the lead free alloys and their tin-lead counterparts....

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Company Information:

BEST offers professional rework, repair and prototype builds of PCBs. Our expertise is on BGA rework and QFN rework. Our experienced instructors teach professional soldering classes as we are an IPC certified training center

Rolling Meadows, Illinois, USA

Consultant / Service Provider, Manufacturer

  • Phone 847-797-9250
  • Fax 847-797-3255

See Company Website »

Company Postings:

(1) SMT parts, accessories & PCB supplies item

(74) products in the catalog

(20) technical library articles

(35) news releases

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