Electronics Forum | Mon Apr 17 19:30:27 EDT 2000 | Boca
All of the above is good stuff. To add, I have seen this several times if the assembly is wavesoldered. Heat from the wave can partially reflow the top side SM solder joints and weaken them. To test, check joint strength before wave and then after
Electronics Forum | Wed Aug 15 18:48:58 EDT 2001 | mparker
I would consider the fab placement in the printer to be of more concern than the pro's and con's of a single foil for top and bottom print. Do to the larger size of the fab you will have to align the top and bottom layers sequentially on the foil. O
Electronics Forum | Tue Sep 26 20:19:51 EDT 2000 | Dave F
Never heard of N-Tech. Whose material do they use? Two common materials are: Imidazole (Via Systems) and Entek (Enthone) OSP is a lacquer that fabs apply to boards by either spraying or dipping. What thickness control does your fab use? For inst
Electronics Forum | Fri Oct 29 10:02:28 EDT 1999 | John Thorup
Chris A lot of people have reported sudden, fab lot related problems with Ni/Au pads. These are usually characterized by a discoloration of the gold and called cheerful names like "black pad disease". This can be a process problem at your fab house
Electronics Forum | Sun Sep 22 13:14:56 EDT 2002 | scottefiske
Stop the lines...! Stop building defects and rework into your product. Contact Fab Supplier and have pipeline filled for small amount of replacement fabs to keep lines running and limiting production scheduling and impact. Request to have the board
Electronics Forum | Tue Mar 07 15:17:25 EST 2000 | Steve Schrader
Is there an industry standard IPC spec. that I should reference on my fab drawings for Immersion White Tin?
Electronics Forum | Tue Sep 05 07:15:28 EDT 2000 | Dan Hinden
Other than pc fab where can i get hold of a supplier listing?
Electronics Forum | Thu May 04 17:08:38 EDT 2000 | Boca
How 'bout engrave / etch the fab number on the frame of the stencil?
Electronics Forum | Tue Mar 07 15:17:25 EST 2000 | Steve Schrader
Is there an industry standard IPC spec. that I should reference on my fab drawings for Immersion White Tin?
Electronics Forum | Wed Aug 18 21:18:00 EDT 1999 | Dave F
| WE ARE CURRENTLY HAVING PROBLEMS REFLOWING BOARDS WITH WHITE TIN PLATING. WE ARE NOT GETTING GOOD WETTING ON THE PADS. | WE HAVE CHECKED THE REFLOW PROFILE AND TRIED DIFFERENT PASTE'S. | WE THINK THERE MAY BE CONTAMINATION OR OXIDATION ON THE PADS.
