Electronics Forum | Wed Feb 22 08:02:56 EST 2006 | dj44
I was looking for an stencil design for a 0.5mm pitch uBGA. Pad size is 0.38mm in diameter. We have been using 5mil stencil with type 3 no clean paste. What size aperture should we be using? Any suggestions?
Electronics Forum | Wed Feb 05 08:20:14 EST 2003 | mbroadway
I'm new to the smt game. I'm trying to learn the basics of stencil design. I've just been tasked with removing and replacing a couple of mictor connectors. I need to find/design stencils for the solder paste. These boards are proprietary, and we don'
Electronics Forum | Tue Apr 17 08:57:05 EDT 2018 | dleeper
Thanks for the update! I guess whoever designed the package knew what they were doing.
Electronics Forum | Mon May 15 15:42:29 EDT 2000 | Doug Smith
Can anyone tell me a recomended stencil apt. design for PBGA's and Ceramic BGA's when using a no clean (UP78) paste?
Electronics Forum | Wed May 22 12:16:14 EDT 2002 | wister
Yes,stencil supplier can give me some suggestion.but all need to be verified again and again.if there is such software can tell us everything about the stencil design? verify if before it be made.I do think it will save time to launch NPI and save ti
Electronics Forum | Wed Apr 11 09:04:06 EDT 2018 | emeto
Try one aperture 60x60mil
Electronics Forum | Tue Apr 17 16:34:25 EDT 2018 | slthomas
I attributed it to luck, but whatever keeps you up and running!
Electronics Forum | Wed Jul 18 17:09:45 EDT 2018 | slthomas
Update - next run started out horribly so went to another stencil design. Reduced thermal pad coverage by about 40% with 4 panes, with cutouts to avoid the vias. Worked like a charm for 10 boards (90 parts). I think we're finally on to something.
Electronics Forum | Fri May 17 14:12:17 EDT 2002 | dason_c
Not now, Valor may under develop the module for its Trilogy 5000 with the stencil aperture based on the rules which you set. Also, check with IRI stencil (Alpha), they have a s/w and based on using ODB++ file and not Gerber. Rgds.
Electronics Forum | Wed Feb 05 10:26:18 EST 2003 | russ
Go one to one at 7mils for these connectors. Generally your stencil shop will do this for you. Somebody has the artwork since a stencil was made for it at sometime? Russ
