Electronics Forum | Wed Oct 29 23:07:42 EDT 2014 | rajz
Help Needed. I face a solder bridging issue on solder mask define pad at edge only for nexlev connector . The pad design such as smd at four corner only. The bridging happen on signal to ground pin only. Current stencil we use 22 round with 6 mils s
Electronics Forum | Wed Jul 25 23:35:18 EDT 2001 | mugen
my guys SOP : Round #1 1) take double-side tape, and peel it flat to the PCB. 2) process this PCB only through P&P SMT. 3) confirm the SMD placement Round #2 4) take thin plastic sheet and tape corners flat to the PCB. 5) solder paste print over t
Electronics Forum | Wed Jul 25 23:37:11 EDT 2001 | mugen
my guys SOP : Round #1 1) take double-side tape, and peel it flat to the PCB. 2) process this PCB only through P&P SMT. 3) confirm the SMD placement Round #2 4) take thin plastic sheet and tape corners flat to the PCB. 5) solder paste print over t
Electronics Forum | Tue Dec 07 14:13:59 EST 1999 | vahid vatannia
Is it true that "square" fiducials cause less error than round fiducials? Also, how does Panasonic machines stack up against Fuji, Siemens, or Philips placement machines? Thank you.
Electronics Forum | Tue Sep 29 17:02:12 EDT 1998 | Mike Cox
| Just verifying that I can post to the main listing. | | Cliff Wow this is nice, I think the new forum is so nice it calls for a cigar (not the presidential kind) and a round of applause (clap clap clap clap). Mike
Electronics Forum | Sat Mar 30 17:42:33 EST 2002 | davef
Never read anything like that, but with the same courtyard, you have the ability to position less material with a circle than a square. Search the fine SMTnet Archives for a heirarchy of sources from which to select pad dimensions
Electronics Forum | Wed May 29 10:52:56 EDT 2002 | slthomas
Just wondering why you'd use a diamond shaped aperture? Seems like it'll just fill in the corners and be pretty much round anyway, so why not just start out that way and keep the volume you want?
Electronics Forum | Wed May 29 13:16:33 EDT 2002 | jax
The only reason I can see for doing this is: Apply more paste than a one-to-one round can provide. Square, diamond, etc... does not matter. Normally this is done for PTP applications but,... If it gets the job done, who cares.
Electronics Forum | Wed May 29 14:24:51 EDT 2002 | caldon
Stick with round aperatures they work fine. If you are successfully processing fine pitch QFP's then switching to BGA's should be no problem. Profiling is a little tricky, a thermal couple should be mounted at the under/ center of the component. cal
Electronics Forum | Tue Jul 30 10:47:31 EDT 2002 | holy1
can some 1 tell me how i can use a 555 timer ? i wanna oscillate between 2 diodes at round 44 khz . is there some formula for dis ?
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