Electronics Forum: pass (Page 37 of 142)

Whitish Solder Joint

Electronics Forum | Fri Apr 04 17:43:52 EST 2003 | Kris

Hi, Did you use this paste before with out any problem or is it occuring for the first time ? If you wash only once a double sided board the side that passes through two reflow will have hardened flux which will may not be washed in your normal wa

Soldering nickel strip

Electronics Forum | Sun Apr 27 18:38:55 EDT 2003 | Yngwie

One of my customer asking me about my capability on soldering nickel strip onto the PCB pad. Given the size of the pad of 80 mil X 80 mil, and he want to ensure that we can pass 4.5kg peel force(solder wire Sn63/Pb37). Anybody with this experience ?

Flex embedded into FR4

Electronics Forum | Thu May 29 10:42:40 EDT 2003 | swagner

So is it fair to say that on a moisture laden double sided flex circuit you could see an increase in tombstoning on the 2nd pass due to warpage created by delamination? In other words a 0603 for instance could tombstone due to the delaminated surfac

Feeder/Machine Maintenance Tracking

Electronics Forum | Mon Aug 11 11:06:16 EDT 2003 | davef

Se�or Tech: Consider searching the fine SMTnet Archives, while you await other responses. There was an idential thread in what seems the past six months. Time passes as blur. So, it could have longer than that. As I recall, you should be consi

Quality / Defect tracking

Electronics Forum | Thu Sep 04 16:44:19 EDT 2003 | mleber

We are a military contractor running mixed technology CCA's. We currently "map" all defects off reflow and wave by indicating the defect on a map (plot from gerber) then passing it on to rework. The map is used for SPC data as well as overall perform

Gerber Data Extraction

Electronics Forum | Fri Dec 19 08:47:47 EST 2003 | browning

I recently found a company that will take the Gerber data and create full Documentation and machine programs from Gerber. The cost is extremely reasonable, so much so, that I have been having them do all of our work. I cannot even do the work myself

PCBA shelf life

Electronics Forum | Mon Jan 05 00:30:07 EST 2004 | Arthur Yang

Hi you there, Do you have any experience upon the shelf life of PCBA which passed 100 cycles of liquid to liquid thermal stress test, 125 to -35 centigrade for 15 minutes and 5 seconds of transfer time from 125 to -35 centigarde. Will apprecia

Oven Profile

Electronics Forum | Tue Mar 09 03:52:56 EST 2004 | vantott

what you have provided are the settings on the oven and not the temperature profile (which represents the actual temperature experienced by the cards as they pass thru the chambers). Usually, solder paste manufacturers provide recommended specs for

Gold surface contam after prebake 150C for 3 hrs

Electronics Forum | Wed Apr 07 10:10:00 EDT 2004 | ccl

thanks Dave, solder mask use is AUS 5 from Taiyo ink, solderability of the contam area is still pass the min spec. gold thickness is ~ 1 um and Ni layer is ~10um. can solder mask bleed cause contam? forget to tell the product is full body gold (FBG)

MPM Teaching Vision

Electronics Forum | Tue Jun 01 19:19:24 EDT 2004 | Ken

single is for a single model. In other words, your "fiducials" are identical or near-so. Multi means your using multiple models. The machine will use individual models for alignment. I would use multi on pads. Is this an SPM machine? I bet your

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