Electronics Forum: solder short thin line (Page 1 of 16)

arrange the line on crystal oscillator

Electronics Forum | Mon Oct 23 03:52:32 EDT 2017 | wendymm

Hello guys, I'm a new learner in PCB field. And recently, I have summarized some basic information I learnt on how to arrange the line on crystal oscillator, but I'm not sure if it is right. So I'll write it down below, hope anyone who may read my po

solder paste

Electronics Forum | Thu Jul 28 07:23:24 EDT 2011 | scottp

My group supports a couple hundred lines all over the world. Most of them use squeegees but a few use either the MPM Rheometric pump heads or the DEK Proflow heads. I absolutely hate the enclosed heads. Flux separation, compaction, and the print q

solder paste

Electronics Forum | Wed Jul 27 09:58:05 EDT 2011 | davef

Pressure printing systems Conventional stencil printing techniques have fundamental limitations as regards paste handling: The volume of paste available for printing is limited, so frequent replenishment is necessary Paste is difficult to c

solder paste measurement machine

Electronics Forum | Thu Apr 26 19:06:08 EDT 2007 | grayman

In short this guys are not well updated on the new technology of SPI. True, 3D IN LINE SPI is no longer a slow machine. Try checking some brand like Cyberoptics,Synapse imaging,SEIMENS,KOHYOUNG and many others...they can match the speed os some mount

Black color solder wetting after reflow

Electronics Forum | Fri Apr 29 14:16:16 EDT 2011 | ppcbs

Below is the long explanation. This defect is most commonly found with BGA components, but can arrise with all components. I see it happening more now with lead free boards that are being assembled with a no clean flux. Best short term remedy is t

Re: Poor HASL Finish known to cause solder shorts?

Electronics Forum | Fri Sep 24 10:57:18 EDT 1999 | Earl Moon

Hi Folks: We've been having bridging problems on our fine-pitch QFP's, despite thorough inspection of paste height, volume, and placement accuracies....profiles look good also. The bridging is happening after coming out of reflow...one la

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Sun Jul 25 08:54:37 EDT 1999 | Tom Gervascio

We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory

We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 10:25:12 EDT 1999 | Boca

We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that a

Hair Line Solder Short at PTH Connector

Electronics Forum | Sat Apr 16 13:43:53 EDT 2005 | KEN

What about electo migration? I had (what apears to be) the exact same problem you describe. X-ray and ICT fails to detect micro shorts. However, in our test, the bench functional test would show a current overload. In some cases the electro migrti

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