Electronics Forum | Tue Jul 28 02:22:59 EDT 1998 | Bob Willis
Here is what I would do faced with your problem. First I would profile a similar board or use an existing profile. From there I would place the dummy device on the surface of a sample board with a thin thermocouple soldered to the board surface under
Electronics Forum | Tue Dec 28 12:55:16 EST 1999 | Justin Medernach
Greg, The best advice that I can give you is a PBGA will respond just like any other surface mount package. There may be a 5 degree delta between a PBGA 356 and a QFP208 but the two respond very similarly in the convection reflow environment. CBGAs
Electronics Forum | Tue Jul 28 02:13:57 EDT 1998 | Bob Willis
There is a procedure for profiling on my web site that may be of use to start with www.bobwillis.co.uk | We are about to run our first BGA devices and would appreciate some confirmation on a few points. | First some details: | PCB & Device: | ======
Electronics Forum | Tue Jul 28 09:15:49 EDT 1998 | Justin Medernach
| We are about to run our first BGA devices and would appreciate some confirmation on a few points. | First some details: | PCB & Device: | ============= | 1) 16 layer (4 power, 4 gnd, 8 signal) | 2) gold on nickel finish | 3) ceramic BGA with eutec
Electronics Forum | Tue Jul 28 17:23:58 EDT 1998 | Robert Steltman
| | We are about to run our first BGA devices and would appreciate some confirmation on a few points. | | First some details: | | PCB & Device: | | ============= | | 1) 16 layer (4 power, 4 gnd, 8 signal) | | 2) gold on nickel finish | | 3) ceramic
Electronics Forum | Tue Sep 09 12:05:44 EDT 2008 | tonyamenson
First and fore most is to find your paste manufacturer spec sheets. Read it over several times and let it all sink in. Then call them with questions as they want to keep your business so their engineers want to help you use their product. I assume y
Electronics Forum | Thu Feb 22 05:32:32 EST 2007 | lococost
Those guys didnt suggest you get in there and check did they Mr Wavemaster?
Electronics Forum | Mon Feb 12 17:24:51 EST 2007 | dave
250-260ish seems a little on the high side ? Depending on the board density and components 230-245 should suffice. Again time above is usually preferred between 30-90secs but again it really depends on the PCB Dave
Electronics Forum | Wed Feb 21 15:29:34 EST 2007 | wavemasterlarry
I here alot of guys at my place talking about cold spots in the oven. You may want to check for them in yours.
Electronics Forum | Mon Feb 12 13:58:10 EST 2007 | campos
Tks for the answers,, My concern is about the intermetalic layer,,I run SMQ230 LEAD FREE paste.. its liquidous at 217C..the oven have 7 zone, but I run in 5 zones also with a more agressive profile (due to the line rate)..I would like to know if runn
