Electronics Forum: temperature and cycling (Page 7 of 48)

Board Stacking and Conveying

Electronics Forum | Mon Mar 26 16:58:53 EDT 2018 | solderingpro

Is there anything stopping you from replacing the flat belt solution to a continuous running steel roller chain conveyor? - From there (depending upon board temperature) you should be able to buffer your boards in a vertical buffer station if neede

Geometric Dimensioning and Tolerancing

Electronics Forum | Sat Jun 06 09:53:59 EDT 1998 | Earl Moon

GEOMETRIC DIMENSIONING AND TOLERANCING (GDT) Using and applying GDT to printed circuitry and assemblies is very much like applying it to any other design for manufacturing (DFM) or design for assembly (DFA) requirement using concurrent engineering (C

Cleaning Machine and Chemistry

Electronics Forum | Mon Feb 19 11:36:39 EST 2001 | billschreiber

Hello Mark, I wish it were that simple so I could direct you to a particular manufacturer and stencil cleaner model. Unfortunately, there are several issues complicating the process of cleaning all these applications in one machine. First and fore

PDBE and PBB replacements???

Electronics Forum | Fri Mar 11 18:47:54 EST 2005 | davef

JD: It's important to note that FR-4 does not contain PBB or PBDE. The bromine in FR-4 epoxy comes in the form of tetra-bromo-bisphenol A [TBBA], which polymerizes and become part of the cross-linked epoxy. Bromine, in the form of hydrogen bromide, i

Step by step guide in evaluation of Solder Bar and Flux

Electronics Forum | Mon Dec 11 20:44:37 EST 2006 | davef

Title : LEAD-FREE WAVE SOLDER FLUX EVALUATION Author : Michael Havener Author Company : Benchmark Electronics, Inc Date : 09/25/2005 Conference : SMTA International Abstract : The European Union�s deadline to ban lead in electronic pr

Recycle Matrix trays and Reels

Electronics Forum | Wed Mar 20 15:25:05 EST 2002 | angiewest

Looking for a company to recycle plastic reel and I.C. tubes. I already recycle trays with Smart Cycle (formally Semicyle). I hate to throw that stuff away. The local recycling places only recycle plastic 1 and 2. Most of the reels are 3's.

Time and temp in lead and lead-free reflow

Electronics Forum | Fri Aug 01 21:10:35 EDT 2008 | leo_dektec

You can keep only the 5th zone as the reflow zone. And lower the first two zones to keep a good ramping rate. Meanwhile,please note the ting temperature in software or control panel is not the exact temperature in your PCB, you'd better get a KIC or

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Thu Nov 15 09:29:29 EST 2012 | anvil1021

Maybe this piece of information will help. In China (just returned from visit) there are many factories that are using a dual temperature process using SAC305 or Sn100C and 42/58. Apparently this allows them to run their through hole parts through re

Water cleaning and Moisture Entrapment

Electronics Forum | Fri Jan 02 08:10:18 EST 2009 | childs

Thanks for the reply Stephen. The time factor sounds logical for moisture invasion during cleaning, probably why there's no articles showing concern about the process. I did try experimenting with some samples and believe it or not could not dupli

Parylene Coating and BGA Reliability

Electronics Forum | Fri Oct 18 12:40:35 EDT 2013 | robertwillis

Back in the mists of time there were two papers on the use of Parylene Coating and the improved thermal cycling results in 1990. It was on LCCC then shortly after on BGA. Does anyone know of results of recent trials or have a copy of the BGA papers.


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