Electronics Forum: facing (Page 3 of 67)

Walkmen In Assembly Area

Electronics Forum | Thu Jan 09 06:44:38 EST 2003 | ldzaugis

One shop picked up productivity with walkmen. The hand assemblers were jammed in tight and frequently face to face. It cut down conversation significantly and reduced complaints about music in general. The policy was eventually changed to only one he

Tombstone defect

Electronics Forum | Fri Jul 30 00:21:01 EDT 2004 | Jet

Hi, Very interesting article on tombstone issue, i'm facing tombstone issue for 0805 IDC component, i've redesign the stencil aperture and change to lead free paste, the tombstone is reducing but not fully eliminated, however there is a problem i fa

Reflow issue with QFN

Electronics Forum | Thu Jul 05 15:13:46 EDT 2007 | joeherz

We've seen non-functional QFNs cured by touching up the toe fillets. Especially with parts that are not plated on the edge/face where you get minimal/no wetting due to oxidation of bare copper. I'm not suggesting that you touch everything up but th

Glue PCBA No solder & Bridging issue at Wave soldering Process

Electronics Forum | Wed May 11 09:07:46 EDT 2016 | SN

We are facing SMT components No solder and solder bridging issue (Glue PCBA) at wave soldering process. Fine tuned the wave parameters improved but not able to eliminate the issue. Suspecting because of moisture pad and component leads contaminated d

PCB Contaminated by minerail oil / wetting problem

Electronics Forum | Fri Aug 04 06:43:40 EDT 2017 | kubabel

Dear all, I´d like to ask You, if somebody faced similar situation like we are facing in our plant right now. We have wetting problems with some of our products. During SEM/EDX we found on non-wetted parts residues of Mineral oil - white - heavy. Do

Solder balls defects

Electronics Forum | Fri Jul 27 13:51:53 EDT 2018 | vlad_saviuk

Hi, have some question: during solder paste printing I'm faced with problems on the edge of the PCB - solder balls on gold pads. During analisys we checked everything - change squeegee preasure, different cleaning cycles, squeegee speed - no effect.

QFP Coplanarity Error

Electronics Forum | Thu Mar 11 21:36:51 EST 2010 | davef

Poor man's approach to assessing coplanarity issues: * Get two pieces of 2X4 wood that are the same length, about three inches long * Cut the end of one of the pieces at a 45* angle, so that the 45* angle cut leaves a face on the four inch side of th

Re: which sector?

Electronics Forum | Thu Aug 24 08:50:22 EDT 2000 | Dr. Ning-Cheng Lee

The conversion into Pb-free very likely will be dictated by the feasibility of conversion. Exemption may be allowed for those sectors facing greater challenges. For instance, the industry is having difficulty in finding acceptable Pb-free alternative

Leadfree dip soldering

Electronics Forum | Wed May 04 08:41:01 EDT 2005 | Hannu

OK, granted, this is not exactly your hi-tech SMD production but pertains to lead-free so I'll post this anyway: Can anybody share their experiences on lead-free dip soldering of transformer terminals? I have not done any testing myself but have see

PCB Expansion (Y & X-axis)

Electronics Forum | Sun Sep 25 11:18:16 EDT 2005 | CS

Hi! I'm facing a strange problem where PCB expanded in X & Y-axis after bottom-side reflow. When the PCB send for Top-side printing process, it is abvious that the printing alignment on the PCB's pads are out. With the problem mentioned above, I am


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