Electronics Forum: solder paste conditioning (Page 1 of 695)

solder paste

Electronics Forum | Thu Dec 10 12:53:12 EST 2009 | deanm

Bryan, Dyoungquist is correct. You should not need to mix solder paste. Overmixing solder paste can adversely affect it. Follow these guidelines and you should be fine: 1. Keep unopened containers of paste in the refrigerator. 2. Take one container

solder paste

Electronics Forum | Wed Jul 27 09:58:05 EDT 2011 | davef

Pressure printing systems Conventional stencil printing techniques have fundamental limitations as regards paste handling: The volume of paste available for printing is limited, so frequent replenishment is necessary Paste is difficult to c

Control the solder paste

Electronics Forum | Mon Jan 10 03:11:11 EST 2000 | Wister

Hi,how to control the solder paste,condition as belows? place at room temp.or put it into refrig.again if the unopened paste has been warmed up 8 hours but it would not been used at once in case of schedule changing.Assuming that this solder paste wi

expired solder paste

Electronics Forum | Thu Apr 03 22:56:48 EDT 2008 | davef

Potential impacts of using expired solder paste are [University of Bolton]: * Changed paste rheology. Result: poor print quality * Loss of solvents. Result: reduced flux activity * Changed flux formulation. Result: More difficult to clean flux residu

solder paste shelf life

Electronics Forum | Thu Nov 03 09:20:29 EST 2005 | russ

Unforunately, the only one who can give you that answer is the manufacturer. They are the only ones who know what is in their paste and how it reacts to different situations and conditions.

Type 4 solder paste

Electronics Forum | Tue Apr 13 14:14:59 EDT 2004 | russ

I have actually printed this same condition with type 3 paste Alpha WS709. I posted this for discussion and cannot remember what I called it. We did need to clean the stencil after every three prints. I did not check volume on these locations but

QFP area solder paste shifted

Electronics Forum | Wed Sep 19 21:10:16 EDT 2007 | wailiang81

Yupe, if condition keep worst, most probably will re-allocate the PCB manufacturer.

INDIUM 92J solder paste feedback

Electronics Forum | Mon May 09 07:27:59 EDT 2005 | cyber_wolf

We have used this paste for about 6 months. It performs very well in a variety of conditions. FYI: Before the 92J we used 92 for about 6 years or so. The 92J is definitely better.

QFP area solder paste shifted

Electronics Forum | Wed Sep 19 21:08:28 EDT 2007 | wailiang81

Those others parts also happend printed not accurate, but there is no solder problem. Only the QFP area looks bad condition.

QFP area solder paste shifted

Electronics Forum | Wed Sep 19 21:04:57 EDT 2007 | wailiang81

Hi,davef, thanks for your concern. The condition was the pasted printed off with around 0.8~0.9mm from the land pattern. This will easy observe at QFP area. At fiducial, the stencil seens aligned accurately. Once solder bridge happend, its easy to

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