Electronics Forum | Tue Aug 24 16:11:21 EDT 1999 | Scott Cook
| Hello everyone, | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks in advance. | | Gyve
Electronics Forum | Fri Aug 20 10:18:32 EDT 1999 | Dennis Fall
I have a layer of electroplated solder (10/90) that appeares to have some sort of contaminent on it. Water will not wet to the layer in some areas. I have tried using 10% HCl in DI as a cleaner as well as 7.5% Fluoboric acid in DI. Neither has tou
Electronics Forum | Thu Aug 19 09:58:14 EDT 1999 | John Thorup
| | | we've received an inquiry if lead free solder for solder dips or surface mounting (cream solder) is available on a technical scale | Dr. Weber I'm not sure what you mean by "on a technical scale" but various no lead alloys are available in
Electronics Forum | Wed Aug 18 15:56:20 EDT 1999 | david dougherty
Hadco offers a technology of building in a "buried" capacitance layer (& other embedded passives) in organic PWBs (FR4 for example). see http://www.hadco.com/prod03.htm and a design manual is posted here: http://www.hadco.com/pdfs/bcguide.pdf I am c
Electronics Forum | Thu Aug 12 10:49:22 EDT 1999 | Ray Hare
I am currently involved with designing a pcb which will use 225 pin bga,s The problem with this design is that the components will dissipate a lot of heat and the design we have come up with is use the middle 6 or 7 rows of balls as the grounding,th
Electronics Forum | Tue Aug 10 16:57:29 EDT 1999 | JohnW
| | Does anyone use reflow profilers? Are they a good investement or is trial and error sufficient? | | | | Does anyone have any suggestions on profiles to try? Thanks. | | | Danielm | I would hazard a guess that most if not all of us production f
Electronics Forum | Mon Aug 09 19:15:49 EDT 1999 | ScottM
| Dear all, | | Has anyone come across an electronic source for SOT23 etc; part markings and their meanings. Obviously, I could wade through the various data books.........but I don't really want to.....yet. | | Thanks in advance, | | Chris. | Tr
Electronics Forum | Wed Aug 04 18:57:26 EDT 1999 | Dreamsniper
| What oven temperature should be used to reflow solder (Sn63Pb37) on a PC board (0.075" to 0.100" thickness) in 5 to 10 minutes? | Hi Judy, In profiling you need an understanding of the reflow specs from the solder paste manufacturer then you nee
Electronics Forum | Thu Aug 05 04:51:46 EDT 1999 | Wolfgang Busko
| | Hello Netters, | | | | Can anyone provide me with info or where to get info on acceptability of solder beads and solder balls? | | | | Thanks for any help | | | | Tom B. | | | | Tom, | The IPC sets the standards for acceptability. But in a nu
Electronics Forum | Wed Jul 28 14:00:23 EDT 1999 | Mike Konrad
I would recommend Zestron's Vigon SC200. It does not require a rinse as long as you cleaner is equipped with a wash solution filter to filter out the solids. Zestron # is (888) 999-9116. The toll-free # is frequently busy� If so, try (703) 589-11
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