Electronics Forum | Wed May 24 11:35:15 EDT 2000 | Bill Ng
Could someone help to let me know when we are doing stencil printing of solder paste on board with OSP surface finish on the land, the stencil is resting on the solder mask or the land itself. If it is resting on the solder mask, then, the actual pas
Electronics Forum | Wed May 24 12:15:53 EDT 2000 | Wolfgang Busko
Bill, I would assume that the stencil rests on the soldermask especially when you use a metallblade. If you know the difference in height between soldermask and land you could take that into your volume calculation when figuring out your desired ste
Electronics Forum | Thu May 25 11:51:12 EDT 2000 | AF Ng
Hi,Wolfgang Busko, Thank you for your help. Still need some advice. If the OSP board having stencil rest on the solder mask, then, would it has more gasketing effect( solder paste squeezed out to the underside of the stencil), as compared to the HAS
Electronics Forum | Tue May 23 22:23:20 EDT 2000 | JAK
Hi all, I'm would like to try intrusive reflow (pin in paste, paste in hole, etc.) on a connector using WS-609 solder paste (halide free, water-washable). I'm concerned about entrapped flux in the barrel of the solder joints. If there were to be e
Electronics Forum | Wed May 24 11:21:32 EDT 2000 | Travis Slaughter
Its my understanding that so long as the paste is not exposed to air it is not going to be active, someone else might be more sure about this than I am. Be ready for lots of half soldered leads using this process. Its quick and easy but will not b
Electronics Forum | Tue May 23 22:21:13 EDT 2000 | JAK
Hi all, I'm would like to try intrusive reflow (pin in paste, paste in hole, etc.) on a connector using WS-609 solder paste (halide free, water-washable). I'm concerned about entrapped flux in the barrel of the solder joints. If there were to be e
Electronics Forum | Tue May 23 16:56:10 EDT 2000 | Ashok Dhawan
For grounding Table Mats/ Floor Mats and workstations, does grounding resistor need special characterstics e.g Wattage, material of construction, etc. We intend to use 1M Ohms resistor. EIA-625 does refer to EOS/ESD-S6.1 standard ( paragraph 7) fo
Electronics Forum | Tue May 23 12:18:25 EDT 2000 | mike weekes
Which companies would you consider for protective coatings, (conformal coating) and other levels of protection? I am taking a fresh look at alternatives. Know any good tests for testing compatability of coating with flux - aqueous or no clean? SMT
Electronics Forum | Mon May 22 17:14:16 EDT 2000 | Justin Medernach
Hi All, I'm looking for companies who sell in-line solder mask applicators capable of dispensing peelable as well as water soluble mask formulations. Could anyone provide me with some names, please. If this is the wrong forum for this question, I d
Electronics Forum | Mon May 22 09:13:12 EDT 2000 | Wolfgang Busko
Hi Sal, I don�t have the solution to your problems but my first thought is warpage. I�ve seen similar things caused by exessive warpage of PCBs 1,6mm thick sometimes and with 0,8mm and T-SOP 50% showed this symptom. Prebaking and a fixture to counte
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