Electronics Forum | Wed Nov 20 03:52:16 EST 2002 | iman
Hello, need help on intrusive reflow process, thanks in advance to the experts and general info sharing :) need some help to obtain answers, to following questions: 1) PCB is FR4, 1.6mm thick, 4 layers, what stencil thickness (stencil design guide
Electronics Forum | Mon Nov 05 20:31:09 EST 2001 | davef
Most people do not intend to �solder� Type K thermocouples. They use solder to �attach� the thermocouple. Search the fine SMTnet Archives for a posting by Chrys Shea. 1 Common thermocouple types commonly used for thermal profiling are: * Type K �
Electronics Forum | Tue Jul 27 16:30:35 EDT 1999 | Earl Moon
| Can anyone give me the virtues of SMT package castellations vs. no castellations with particular reference to the ruggedness and reliability of the solder joints? Any references or studies that you can point me to? Also, although I'm in favor of
Electronics Forum | Wed Jan 02 12:11:32 EST 2002 | mparker
Ian is correct in saying that the Cert.s and x-section should be forwarded to QA. It would be the responsibility of Incoming or Receiving Inspection to validate the materials. Your suppliers are offering proof that they comply to industry standards o
Electronics Forum | Fri Jan 02 17:47:21 EST 2004 | gpaelmo
Yes, We have done away with masking with kapton 8 yrs ago. As long as the goldfingers are leading edge you can use one of these: 1. rubber goldfinger boot/glove - contact east use to carry them...don't know if they still do. 2. fiberglass glove - ma
Electronics Forum | Sat Feb 26 22:32:42 EST 2005 | siverts
The directive is called RoHS. Meaning that is not only the lead that is the issue. The materials need to whithstand a hihger temperature, not only delta T is an issue (but huge). Moisture sensitive devices: how to handle these? You will see an increa
Electronics Forum | Fri Sep 22 02:19:25 EDT 2006 | lead free tester
The directive is called RoHS. Meaning that is > not only the lead that is the issue. The > materials need to whithstand a hihger > temperature, not only delta T is an issue (but > huge). Moisture sensitive devices: how to handle > these? You wil
Electronics Forum | Tue Apr 18 12:34:15 EDT 2006 | Chunks
Outside the box: Can you retro your oven with a belt chain combo? I always order my ovens this way just in case. No pallet or carrier needed then. Can justify retro against the cost of the pallet or carrier. Two part epoxy instead of heat cure?
Electronics Forum | Tue Sep 18 07:52:29 EDT 2007 | davef
Does the change from supplier to supplier as a result of: * Board definition? * Differences in processing at fabs? 3 Specification Fir Tree General Technical Specification 3a Design/Layout: * IPC-2221 * IPC-2222 3b PCB Fab: * IPC-6011 * IPC-6012 * I
Electronics Forum | Fri Mar 14 11:25:02 EDT 2008 | hegemon
ol' hege has got to agree with Chunks and Dave. Seems every time there is a problem, the finger is first pointed at the process. For my $.02 it doesn't matter if your process is 100% bulletproof, procurement will screw it up by finding a vendor that
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