Electronics Forum | Wed Feb 08 03:35:58 EST 2006 | GS
100�C) the moisture changes in vapour/gas generating an internal pressure causing in the worst case damages like internal planes delamination, popcorn effects, degassing, ecc. So you can understand why before reflow it could be necessary to backe and
Electronics Forum | Mon Mar 27 20:52:22 EST 2000 | Dave F
Marc: In printed circuit board fabrication, fabricators place sheets of prepreg between each pair of glass cores. They stack these layers into books. As they heat and press the books, the sheet melts into an epoxy glue. The thickness of the prepr
Electronics Forum | Wed Jun 24 13:26:39 EDT 1998 | Brian @ ETS
Dear Upinder, While reading the posts at the SMTnet forum I noticed your post pertaining to Curing ovens for use with Conformal Coatings which require regulated relative humidity to activate the cure. My company, ETS, is the manufacturer of Nordson's
Electronics Forum | Wed Mar 04 10:59:24 EST 2015 | jpierre
Hi first DS65 version is a specific dilution for dispensing machine, in this case the typical process is following: application of the conformal coating extraction of solvent (low extraction power is better)2minutes and drying the drying can be done
Electronics Forum | Sun Jan 14 12:42:35 EST 2007 | SMTRework
I think the main cause of this condition is #3 because both #1 and #2 never change from board to board, these are identical boards with identical BGA revisions. These BGA's (as stated before) are about 3 years old.. I don't believe they are lead free
Electronics Forum | Wed Mar 31 21:08:34 EST 2004 | Ed
Hey guys. I've been manually dunking circuit boards for 8 years now. I too have the excess residue issue to contend with. I'm using a low solids - no clean flux from Kester (959). I have used solvents, thinners, windex and a multititude of cleane
Electronics Forum | Sat Jul 22 03:27:36 EDT 2023 | shrikant_borkar
hi here are consolidated inputs to you you must validate before establishing your process. ESD-safe Material: Ensure that the masking tape is made of ESD-safe materials that have low triboelectric charge generation. Common materials used in ESD-sa
Electronics Forum | Mon May 10 13:35:14 EDT 1999 | Chrys Shea
| We have been having an ongoing problems with radial electrolytic capacitors (thru hole)for some time. | 1. When we wash them in our inline cleaners the sleeving shrinks up from the PCB leaving the 'can' exposed. Some designs have traces on the
Electronics Forum | Mon May 10 14:44:15 EDT 1999 | C.K.
| | We have been having an ongoing problems with radial electrolytic capacitors (thru hole)for some time. | | 1. When we wash them in our inline cleaners the sleeving shrinks up from the PCB leaving the 'can' exposed. Some designs have traces on
Electronics Forum | Thu Oct 04 00:03:28 EDT 2018 | gaintstar
flason smt pick and place machine: http://www.flason-smt.com/product/Hanwha-IC-placer-SM321-High-Speed-SMT-Modular-Chip-Mounter.html http://www.flason-smt.com/product/Hanwha-Pick-and-Place-Machine-DECAN-F2-High-Speed-SMT-Modular-Chip-Mounter.html htt
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