Electronics Forum | Fri Sep 14 15:28:12 EDT 2001 | davef
Some handicaped people take ours. Don't know what they do with them, probably should, but don't. Otherwise, haven't stayed current. At one time we have used: * SemiCycle Foundation 512.339.4229 800.580.7364 http://www.semicycle.org * CTI Recycling
Electronics Forum | Tue Sep 18 10:22:22 EDT 2001 | jschake
Paste Flux / Reflow: Our experiments indicated that the combination of no-clean solder paste and air forced convection reflow produced the fewest tombstone defects, followed by water-soluble paste reflowed in air, and most tombstones occurring with
Electronics Forum | Mon Sep 17 14:57:11 EDT 2001 | ert002
We are printing 0.012" apertures on a .012" Solder mask defined pad in a fine pitch BGA application. The board is 0.032" thick with very little room on the bottom to place support pins under these areas. Our first pilot proved extremely difficult to
Electronics Forum | Thu Sep 20 11:22:13 EDT 2001 | ert002
Sorry for not getting back sooner.. a virus attacked our network yesterday. The experiment you have outlined is what I had next on my list...just trying to see if anyone had done it before. We will be experimenting with 0.004" and 0.005" thick sten
Electronics Forum | Wed Nov 07 02:41:58 EST 2001 | marshall_shuai
Dear Mr. Jeff, Our SMT room are using the DEK288 and MPM2030 Printers at the same time. We found the similar problem also as mentioned by MR.JOHNW. We analysis it was mainly caused by the PCB metal fixture used in DEK288. The PCB metal fixture is
Electronics Forum | Tue Sep 18 01:41:23 EDT 2001 | shvetangcd
Hi Jeff, We are having solder-short problems for BGA, QFP, and some other fine pitch parts while using DEK screen printers. The PCB is processed on the second half of the line for screening the side with BGA, QFP, and other fine pitch parts. Which m
Electronics Forum | Tue Sep 18 18:36:59 EDT 2001 | mparker
... and don't forget proper stencil alignment. Invariably I find most bridging problems for fine pitch parts, etc. is caused by lousy alignment. The alignment must be verified under magnification, using the naked eye is not good enough. Use at least
Electronics Forum | Tue Sep 18 13:21:06 EDT 2001 | fcouture
Hello Jeff, I found some good information from what I read until now...so thank you! I have two questions: 1) What finish did you use on the PCB for 0201 ? I think with an aperture so small (12x15mils) tin plated is impossible, what do you think
Electronics Forum | Wed Sep 19 16:02:14 EDT 2001 | fcouture
Pad Metallurgy Used: >Is your question about this targeting the current industry capability of using tin plating technology on such small >pad dimensions? Actually I should have asked for tin/lead plating (HASL) and yes it's to have an idea on capab
Electronics Forum | Mon Oct 01 09:42:42 EDT 2001 | ac
Darren , I done the HNC in Electrical & Electronic Engineering which was later changed to Mechatronics . The course itself will give you a good broad based grounding in all aspects of E&E Engineering . What you really need to back it up is good quali
