Electronics Forum | Wed Feb 02 03:32:08 EST 2000 | pascal MATHIEU
emmanuel : i agree with Dave , it's easy to have blind hole on the bottom side , of course in this case you'll lose some thermal efficiency ;the second solution is to put on the bottom side between the board and your heatsink a soft thermal interfac
Electronics Forum | Wed Jan 26 21:23:51 EST 2000 | Dennis
Hello! all Will anybody give me advice for missing componets for 0402, 0603 R or C chips? I am not gonna tell you which machine I use, but from my experience, every p&p machine has possibility for missing component after placing 400 or more componen
Electronics Forum | Wed Jan 12 18:00:12 EST 2000 | David J Nowak
We have a quad flatpack that is adhesively bonded to the face of the printed wiring board. We need to remove it from the board. The leads have been unsoldiered. We are thinking of placing a rectangular cavity on the end of a shaft over the QFP and
Electronics Forum | Tue Dec 28 15:35:21 EST 1999 | Mike Naddra
Edmund, An 0603 component should not fall from the board durring an inverted reflow pass, provided that: Your land geometries are correct for the package type (Start with SM 782 guidlines)- as surface tension of the liquidous solder is what holds
Electronics Forum | Thu Dec 19 13:55:35 EST 2002 | John
I don't know what type of boards you are doing but if they are through hole or surface mount. You can get a whole line of used equiptment for pennys these days. I am sure that I could send you a quote for a complete line. The price of used equiptment
Electronics Forum | Thu Dec 19 14:41:11 EST 2002 | Randy Villeneuve
On the outside looking in the cost of manufacturing your board assemblies may look high. I will tell you that it is probably a good price. There are allot of hidden costs in manufacturing and yes equipment right now is cheap but try buying parts chee
Electronics Forum | Sun Jan 05 14:45:23 EST 2003 | Brian
I don't think it is a good idea to run your own board in house. The cost will be higher than let the contract out company do it for you. If you are looking for a Smt line.. You must spend atleast $400.000 for an use equipment. Printer= $100.000 Pick
Electronics Forum | Fri Dec 17 06:11:33 EST 1999 | Christopher Lampron
Henry, TNT makes some good points. I have also found that the use of a 2% silver solder paste (provided that it's allowable) can help reduce the occurance. You may want to run a thermal profile on the PCB is question. Is the board thermaly equalized
Electronics Forum | Mon Dec 13 21:05:34 EST 1999 | Curtis T.
Ken, we always build the bottom side of the board first. That also insures that there isn't any problems with the actives being reflowed and falling off in the glues curing process. By the way we do both paste and glue on the bottom of the boards t
Electronics Forum | Sat Dec 04 02:21:32 EST 1999 | Vinesh Gandhi
Hi All, I am facing a strange problem. One of my esteemed & valued customers has an unusual requirement of cleaning the board with IPA after soldering is complete. I am using alpha metals UP78 no clean sodler paste during reflow. This IPA cleanin
