Electronics Forum | Tue Jan 30 15:30:17 EST 2001 | dason_c
Please check what is the actual pitch size. I found some of the designer use 15.7 mil pitch and no accumulate ie 15.7, 15.7 and 15.8...... Also, I recommended the pad width should be 10 - 11 mil for 0.4mm pitch. You can open the 10 - 10.5 mil aper
Electronics Forum | Sun Nov 22 10:05:37 EST 1998 | Christopher Lampron
| Does any body know stencil manufacturer in states or south east asia for electroforming processes and step down from 5mil to 3mil. | | Thanks! | Daniel, I do alot of work with Photoetch stencils in Massaschusetts. I do not have the Phone number h
Electronics Forum | Mon Oct 15 11:03:24 EDT 2001 | mikecampbell
Dave, Thanks for the info! Yes, I have read the IBM document and realized that I was missinformed about the paste volume. I need 5000 to 5600 cubic mils of paste. Running the numbers I get a 32 mil aperture with a 7 mil step (the rest of the board
Electronics Forum | Sat Feb 01 16:11:24 EST 2003 | Paul Smith
I would suggest scoring if the profile allows, leaving residual material of circa 40 - 50 mil - That is what I do on a 125mil thick PCB width of the pis is approx 200 mil Mouse bites on a board as thick as 135 mil will mean its extremly difficult to
Electronics Forum | Thu May 29 17:19:51 EDT 2008 | dyoungquist
On 0402s we use 20x25 mil pads with a 15 mil gap between the pads on the pcb with ENIG finish, 5 mil stencil with a 1:1 aperture (20x25 mil) and SAC305 lead free solder paste. We very rarely see any tombstoning on 0402s using this setup.
Electronics Forum | Sun Feb 28 20:05:54 EST 2010 | aungthura
Dear all There are alot sockets in our products,BIB.These skts are lifted abit after being solderd with wave machine.If the skts become lifted, how much tolerance of the high is acceptable? as example 1mil~5mil,or,1mil~8mil. Pls advise me. Thanks in
Electronics Forum | Tue Oct 10 20:14:01 EDT 2000 | Dason C
Hi! CJ. Please advise what is your pitch size ie 15.7 mil or what is your capabiliy can you build the board with pitch 15.75 mil (please note that the actual dimension of the package is 0.4mm), and how many lead on the package. The pad width of Ind
Electronics Forum | Sun Apr 15 23:12:00 EDT 2001 | Eric Chua
The size i had changed from 55 x 20 mils to 42 x 20 mils. The component size i have is 40 x 20 mils ( 1mm x 0.5mm ).
Electronics Forum | Thu Jan 13 12:22:32 EST 2000 | Dave F
Abbas: For IPC specs: Go to ipc.org For MIL specs: Go to dscc.dla.mil Good luck Dave F
Electronics Forum | Thu Apr 29 09:37:12 EDT 1999 | Dave F
| Can anyone in this world produce such small PCB/PWB trace widths? Lots of theory so far, but have not found anyone yet who can do it in practice. | Daniel: 2 mil lines with 3 mil spaces are pretty technical. Good luck. Dave F
