Electronics Forum | Sun May 22 23:24:08 EDT 2005 | thaqalain
DC is safely applied to the primary of a transformer: 1-when limiting resistance is in series with primary 2--------------------------is in Parallel 3-When neither of the preceding applied.
Electronics Forum | Mon Oct 06 10:04:29 EDT 2003 | davef
Excess low residue flux is very dangerous to leave on your finished assembly, because it can: * Be corrosive to your solder connections * Promote dendrite growth. To prevent this, follow your supplier's recommendations on: * Applying the proper amou
Electronics Forum | Thu Oct 12 09:48:05 EDT 2000 | John Thorup
Actually they are complimentary. SMOBC describes how the solder mask shall be applied (but not the type, surface finish, color, etc). The other terms describe the type of surface protective finish applied to the solderable surfaces. You need to sp
Electronics Forum | Thu Aug 09 15:56:50 EDT 2001 | davef
Thank you. IPC-2222 applies to rigid organic boards. It does not apply to ceramic boards. Since there is no 2222 analog for ceramic boards, I used 2222.
Electronics Forum | Wed Aug 22 12:52:57 EDT 2001 | Charlie
Would like to hear the pro and cons of using a machine like CamAlot 3800 to apply past to PCB. What has been to your experiences?
Electronics Forum | Wed Aug 22 14:24:39 EDT 2001 | markhoch
I used a CamAlot 5000 to apply conductive epoxy on an aluminum substrate about 4 years ago. I used the largest diameter nozzle CamAlot had, and I bumped the dispense and dwell times way up. It was the slowest stage in the process, but it worked out o
Electronics Forum | Tue Aug 20 19:15:39 EDT 2002 | stownsend
On a gold plated PCB, when in the PCB fab process is the gold plating applied? How about OSP, when in the process is OSP applied?
Electronics Forum | Thu Nov 07 14:30:38 EST 2002 | Debi Musante
We have been presented with the task of placing a BGA on top of a PGA. The previous process choice was to apply paste directly on the BGA (which failed functional testing) We are considering applying tacky flux (only) on BGA, since this is our first
Electronics Forum | Wed Mar 26 15:53:47 EST 2003 | russ
If you are applying paste, you should duplicate the profile recommended by the paste manufacturer. If you are applying flux only than you need to ensure that you do not exceed max temp and/or ramp-rates such as
Electronics Forum | Fri May 07 17:04:02 EDT 2004 | davef
Either method is acceptable: * No IPC approved method * Applying flux only is easier than applying paste * Paste gives a higher stand-off, which should improve reliability