Electronics Forum | Mon Feb 05 09:48:51 EST 2007 | George
Good morning, What is considered "high frequency" ,.i.e. Mhz,GHz,etc., when we talk about possible issues with NO-clean flux residues and product's application? I appreciate your help on this... Have a good one! George
Electronics Forum | Mon Feb 05 17:29:18 EST 2007 | flipit
I had problems with very simple timing circuits in the kilohertz range with leadfree NC solder pastes. Never saw the problem with lead NC solder paste. Run lead free no clean and clock was off. Run lead no clean and clock was right on.
Electronics Forum | Wed Feb 07 23:30:13 EST 2007 | KEN
I have a customer who runs A-D applications with 5GHz analog and it is 100% no clean. The only answer that will be acceptable is what works for your circuit design.
Electronics Forum | Tue Apr 09 08:44:43 EDT 2002 | davef
Read IPC-7530 "Guidelines for Temperature Profiling for Mass Soldering Processes (Reflow & Wave)". There is no advantage in dropping off much faster than 4�C/sec. In fact, you risk fracturing your newly formed solder connections due to board warping
Electronics Forum | Tue Apr 09 08:49:43 EDT 2002 | davef
Hey Bud. Allow me to 'turn' your point about 'grain structure' just a bit. Fast cooling rates / coarse grain structures was a bit of red herring in the early 80's. Faster cooling DOES produce finer grained solder connections. Accelerated testing of
Electronics Forum | Thu Jan 11 09:19:56 EST 2007 | SMTRework
I know this is not the correct forum to post chip "reworking" questions but you guys have been very helpful in the past. My question is this, when we rework BGA components most of the time the solder reflows at a normal temp and all is well. On occ
Electronics Forum | Fri May 15 18:26:06 EDT 1998 | Earl Moon
| | Hello. | | 1 Could anyone tell me the range of temperature | | to solder MI components? The process eng is using 400~500 | | degrees Celcius!! For standard 0805/0603 chips & TH components & | | also to touch up on ICs. What
Electronics Forum | Fri Oct 08 10:08:48 EDT 1999 | Glenn Robertson
| | | | I have a board, 4 spacers needed to be soldered on the board | | | | first with the normal 62Sn37Pb alloy. Then, capacitors are manually soldered on the boards. The density of the board is quite high. If we wave soldered capacitors first,
Electronics Forum | Mon Sep 01 04:55:20 EDT 2008 | benefon
Hello all Our Omni 5 has given the 'Cooling module high temp' warning twice during the past month. I suspect that the blower motor is the culprit but have not been able to verify this because the oven has started up normally after acknowledging the
Electronics Forum | Fri Sep 06 03:11:31 EDT 2013 | 5pcb
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