Electronics Forum | Tue Jan 02 14:15:59 EST 2007 | realchunks
I have a new customer that has a print calling for 2oz. copper finish for top and bottom layers, and 1oz. copper finish for the inner 6 layers. Now, they also have a stack up depicting each layer and thickness. It shows the outer layers of copper b
Electronics Forum | Wed Jan 03 09:59:52 EST 2007 | Jim
Hi, I was looking for information on failure rates for BGA components. I am analyzing our BGA rework rates and find it difficult to define a root cause when a remove and replace of the BGA component corrects the test errors. Inspection prior to re
Electronics Forum | Wed Jan 03 10:34:18 EST 2007 | dphilbrick
Your failure rate should be as good or better than any other leaded part on your board. Have you done a reflow profile on this board. We typically sacrifice a board and drill a hole from the bottom and then imbed a probe under the part to get the tem
Electronics Forum | Wed Jan 03 10:41:47 EST 2007 | Rob
Consider this: The inner balls will be at a lower temperture than the outer balls in reflow, so if you cannot inpsect them then that may be where your problem lies. Are you reworking with a specialist machine that is directing the right amount of h
Electronics Forum | Wed Jan 03 11:14:26 EST 2007 | realchunks
What is your biggest failure mode? You root cause problem could be anything from poor ICT fixture to bad incoming inspection. Generally, BGA's are a high yield producing component. Just cause they're neat-o doesn't make em' bad. As for 85% yiel
Electronics Forum | Wed Jan 03 11:34:41 EST 2007 | SWAG
We have a SMT build that has been trouble from day 1. This board is about 2" x 2" and is panelized. The PCB is unusually thick (0.100"). The problem we always have (no matter if it's leaded or no-lead) is that the solder likes to wick up the heal
Electronics Forum | Fri Jan 05 11:41:40 EST 2007 | pms
Rob, I feel your pain brother...... The problem is that the old Mydata system is considered a "slow scan" system. Can't just use any monitor. We had to go with a replacement monitor from a company called Vartech Systems Inc. (www.vartechsystems.com
Electronics Forum | Thu Jan 04 02:25:12 EST 2007 | Loco
Sorry Dave? There is a seperate table safely hidden away in the D version, but i dont know if it is something new. chapter 7 THT - 7.5.5 Supported holes - solder has a table specifically for PIP, table 7-7 Plated trough holes with component leads -
Electronics Forum | Thu Jan 11 14:27:30 EST 2007 | gregcr
I worked for a similar company. They had 4 GSM's. Most all of the GSM's software have a fairly straight forward way of importing data, it is just a matter of formating it correctly. I can't imaging using calipers to make a GSM placement program if
Electronics Forum | Thu Jan 04 10:27:47 EST 2007 | slthomas
1) determine the rate of cleaning frequency related defects your production can tolerate. 2) determine the frequency that nets you that defect rate, or lower, but also consider the cost of cleaning materials and throughput if you're cleaning very oft
