Getting In Too Deep

Considering going to FORUM Format, this way dialog and content can be better grouped and followed.  This will stay up and be mostly for posts, but the forum will be best served for post and pictures that need to be answered.  The Blog only allows pictures at the beginning, and questions afterwards cannot post pictures.  Keep in mind this is intended for Technicians, and experienced individuals.  There is no way that I can train via the internet on how to do something. (At least not in the current format) Since I see that there are lot of others that have been left behind, and some schools are not finishing the job.  I will try to outline and classify better on the new Domain.  You will have to subscribe so that I can at least keep track of my mail, questions and answers. One thing I do ask, is Try to STAY on blog, direct questions to my email address misses hundreds of others that may want to ask the same thing, or are asking the same thing. ...

Due to activity and being summer I had held off posting some items that had come across my desk.  So shortly expect a flurry of activity. A recent email asked several questions that I think I can answer before hitting the grind again. Do I do my own reballing? No, the method I use corrects the solder balls. The biggest defect of BGA and RoHS solder is tempetature and contraction of metal. Down on the atomic level, the valance bonds of the multiple elements used (in solder) break and you get a weak composition. Excessive heat causes metal to retract to themselves. So instead of getting a bond, you get contact.  Example: In the DV series, the breakdown is as follows.  After a period of time and use, the vents on the heatsink will become blocked.  This is from typical use and the placement of the Air In slots on bottom. They draw in fibers from pants, shirts, sheets, bedding, pet and human dander and carpet. Often larger than the vents exit. As more and more...