Electronics Forum | Mon Oct 23 14:05:08 EDT 2000 | Aokilab
Hi Soza: As Dave F mentioned, there are lot of factors involving the formation of residue, after cleaning. Factors, (such as: solvent's cleaning power, presence of metal oxides, type of soldering flux, etc...). One thing pretty sure, IPC is usually
Electronics Forum | Thu Oct 05 16:48:41 EDT 2000 | LarryK
Has anyone ever used the circuit repair kits? The type where you can replace a PTH or SMT pad that has been lifted or damaged? It appears that you just select a pad, trace or whatever needs replacing from a panel and heat or glue it onto the board.
Electronics Forum | Thu Oct 05 17:05:36 EDT 2000 | JAX
These types of foil kits work just fine as long as they are used before expiration. Scraping off the epoxy coat gets a little tough on fine pitch pads and etches. I have always like to use a solder sample board to retrieve my bits & pieces from whene
Electronics Forum | Thu Oct 05 09:31:41 EDT 2000 | Daniel
Hi! Does anyone have experience from PCBs with mixed technology. Do you store the PCBs in nitrogen/dry air cabinetts if you�re not able to wavesolder the PCBs within the same day. What considerations need to be taken concerning popcorning/delaminati
Electronics Forum | Tue Oct 03 16:55:26 EDT 2000 | Chris
Does anyone have any recomendations for a NC flip chip attach flux? I have info from Indium and Kester. Who else makes a good flux for flip chip. I will be dispensing this flux using a doctor blade and rotating disk. I will then dip the flip chip
Electronics Forum | Wed Sep 27 12:44:52 EDT 2000 | Ashok Dhawan
What could be possible resons for " Plating Crack on Barrel (tented via)" This tented via is in proximity to parts being hand soldered. The crack in barrel was detected on failure analysis - micro-section of via where barrel is having crack ( circul
Electronics Forum | Tue Sep 26 20:50:06 EDT 2000 | Dave F
Right!!!! We have built product with via holes only 0.010" off the edge of the routed edge or even routed them in half, which usually adds cost and shorts to the chassis. Most high speed routing has a tolerance of +- 0.005". It's common for UL fi
Electronics Forum | Wed Sep 20 15:51:19 EDT 2000 | John
We are considering retrofitting our Vectra wave soldering machine with a hot air knife. I've run our problem board on a machine with this option and it does seem to work; however, there is a concern of component failure due to thermal shock. Is thi
Electronics Forum | Thu Sep 21 20:22:14 EDT 2000 | Dave F
Mike: Why not hold this conversation on-line, so that we can all benefit? That's really one of the purposes of forums like SMTnet ... free flow of information for the benefit of all. Not a place where sale-types can develop contacts. Right??? Wh
Electronics Forum | Thu Sep 14 09:53:09 EDT 2000 | John Thorup
Cheap and beige = CEM1 Dave has good advice. Go to a fab that you use and ask them. My concern is that you are not getting enough documentation to do your job correctly. If your customer expects you to duplicate a sample they had better spec what th
