Electronics Forum | Thu Mar 08 12:40:54 EST 2001 | Ralph Merk
We are currently using 0402 resistors and capacitors in our production process. Our equipment is as follows: - DEK 265 - Siemens S25/F5 - Vitronics XPM520(5 zones) - 2% silver solder Alpha WS678 The problem is that randomly some 0402 capacitors are
Electronics Forum | Thu Mar 15 18:27:40 EST 2001 | traviss
Like I said it was only a rumor I heard but intrigued me enough to play around with it one day. The lambda wave worked better than the chip wave did with makes me believe it was the surface tension of the solder not melting the already soldered parts
Electronics Forum | Wed Mar 21 20:40:28 EST 2001 | dblsixes
We are building a monster ... Dimensions are 10" x 7" ... 12 layers ... A Logic Assembly with a Power Supply all rolled into one ... The Power Supply is in one section of the board, the logic in the other section ... The Power Supply obviously has a
Electronics Forum | Thu Mar 22 21:10:42 EST 2001 | dblsixes
Ah ha! ... You hit upon something that I discovered earlier today ... As I said in an earlier post, I was going to experiment with dog-boning the solder paste ... But upon further review, I discovered that our customer removed 75% of the pad behind t
Electronics Forum | Fri Mar 23 21:36:02 EST 2001 | CAL
If you do not have any luck finding a west coast lab, but need services I am sure we can help. The only problem is we are on the east coast. Many moons ago empf was on the west coast (China Lake) but moved eastward. We are in Philadelphia, PA. (ski
Electronics Forum | Thu Mar 29 15:26:35 EST 2001 | johnw
measuring Paste volume or at least paste height is an essencial part of any SMT process. You've got to control those input's.... Paste volume determines how much solder is available for your joint so theres a direct to joint reliability / PCB reliabi
Electronics Forum | Fri Apr 06 08:35:20 EDT 2001 | brownsj
You can buy plenty of paste height measuring systems today, ranging from full 3D laser systems to systems using an oblique light line which will measure the paste height only. I found that the lowest cost option was to attach a DTI to the focus contr
Electronics Forum | Thu Apr 05 22:24:32 EDT 2001 | davef
I think your solder mask is a partial cause of your solder balling. Additionally, adjusting some machine set-up parameters may also help. 1 If we were talking about a single assembly problem, we�d be thinking about the laminate, but since you say t
Electronics Forum | Mon Apr 16 10:55:01 EDT 2001 | genny
Happened at my company lots on our older designs. We touched up those pads in house by hand, because the solder joint was very poor. We also did it on SOT 86 pkgs on the gnd pins. When they were touched up, we would get an extra 1/2dB of gain out
Electronics Forum | Thu Apr 26 21:09:14 EDT 2001 | davef
Hey Wolfgang: I was down at Jimbo's and tried a McEwan's Pale Ale, yech!!! And Scotch beer [eg, McEwan's Scotch Ale, Tennant's] has been so berry, berry good to me, helping to sauve the travails of winter, until I could starting working on wheat be
