Electronics Forum: coating materials (Page 17 of 43)

Leadfree dip soldering

Electronics Forum | Wed May 04 11:54:29 EDT 2005 | HOSS

Rob, Are you hinting that the lead content of this component with dipped tin/lead solder would not be an issue with RoHS? If so, our understanding is that the legislation requires that the 6 banned substances cannot exist at greater than X% in any

Lead-Free Alloy composition used for leaded IC Packages

Electronics Forum | Tue Aug 22 09:30:31 EDT 2000 | Kelvin Chow

Mr. Lee, Although most of the lead free alloy used for solder paste and wave soldering have been identified, a suitable alloy used for leaded Ic packages (like QFP, PLCC..etc) have not been identified yet. Do you have any suggestion on this lead-f

Cleaning of Entek Boards

Electronics Forum | Thu Jul 18 21:04:06 EDT 2002 | davef

So, why can't you clean misprints on Entek boards? Entek: Cheap, flat, OK shelf life, not without process and fabrication issues. Your Entek organic solderability protection is probably Entek Plus [CU106A] made by Ethone OMI. Consider getting a co

Masking of PWBs prior to conformal coat

Electronics Forum | Wed Apr 19 16:43:05 EDT 2006 | samir

Silicone-based coatings "repel" most foreign,non-compatible materials like peelable solder mask, and rubber or vinyl boots. The result is, uncured material around the vicinity of where the boot was. Trust me. Been there and done that. As a rookie

Urethane Coating (1A33)

Electronics Forum | Wed Aug 27 08:06:43 EDT 2008 | davef

Thick, hard conformal coatings of acrylic, urethane and epoxy have a well documented history of causing solder joint cracks and breaking glass/ceramic and other brittle components. Dissimilar expansion and fairly high surface bond strengths of the ma

Re: Need suggestions on conformal coat curing oven

Electronics Forum | Wed Apr 14 20:39:02 EDT 1999 | Dave F

| I need to cure conformal coat on a 19" x 15" board. The material needs 7 - 10 minutes at 100deg C, but I have limited floorspace so I'm looking for an oven with about 36 inches heated length and 18 or more inch wide belt. The material we are consid

Flex Circuits reflowing

Electronics Forum | Fri May 02 12:41:16 EDT 2003 | Chris Lampron

Hi Chris, I had worked for a flex circuit house for 10 years. You should be able to follow your solder paste guidelines for times and temps. You may want to consider pre-baking the flex if it is made with Kapton. Kapton is Hygroscopic and will delam

Re: Solder Mask repair

Electronics Forum | Mon Apr 17 19:44:20 EDT 2000 | Dave F

Ashok: Well, your customer probably has a good reason for wanting you to send them boards without holes in the solder mask. What is their goal for the mask capabilities after you get do reworking the boards? * Cosmetic surface coat? * Performance t

Tenting via(s) under BGA & CSP?

Electronics Forum | Fri Apr 12 17:22:47 EDT 2002 | davef

First, splitting hairs on parlance. * Conformal Coating. A thin electrically nonconductive protective coating that conforms to the configuration of the covered assembly to provide environmental and mechanical protection. * Solder Mask. Coating mate

Underscreen cleaning cycles

Electronics Forum | Fri May 11 14:54:38 EDT 2012 | stentech

I am not aware of the Nano protek flaking off. However I do believe it can wear off through abrasion. Unforunately there is no red light goes off when it has worn unless you have good paste inspection. Even when it wears it will not take you to a neg


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