Electronics Forum: low dk glass (Page 1 of 5)

Seeking very low volume production reflow oven

Electronics Forum | Mon May 01 23:23:58 EDT 2006 | grantp

Hi, I off center idea we used when we started. Get a pasta cooker, and put in vapor phase fluid, and then use that. Place the product in the bottom of the inner pot, and then heat on a small hot plate. When the vapor cloud gets high enough and the

Re: PCB laminate dielectric absorption

Electronics Forum | Wed Dec 13 20:42:57 EST 2000 | Dave F

Material Dk @ 1GHz tan d @ 1GHz Difunctional 4.40 0.020 Multifunctional 4.43 0.018 Polyimide 4.06 0.006 Cyanate ester 3.65 0.005 Bismaleimide triazine 2.94 0.011 PPO-epoxy 3.85 0.012 PTFE-glass 2.60 0.001 PTFE-mat-CE 2.79 0.003 PTFE-ceramic 4.06 0.00

Handling/storing SMT leftover parts - cut strips

Electronics Forum | Mon Dec 11 14:26:11 EST 2023 | proy

Looking for ideas/conversation on how people handle short strips or leftover SMT parts in inventory We do a lot of high mix low volume jobs we often have strips or even parts in bags which we need to keep and inventory. Presently the non reels are

PCB Material selection

Electronics Forum | Wed Jun 21 14:14:43 EDT 2000 | Gary Hunt

I need to construct test boards for which will be repeatedly subjected to Highly Accelerated Stress Screens, (HASS), and am looking for recommendations for materials. Would an Epoxy Glass or an Epoxy Glass Composite be least suceptible to exposure t

Solder wave

Electronics Forum | Tue May 08 09:50:19 EDT 2007 | patrickbruneel

Hi Loco, Good point!! The good old glass plate works just fine as long as the conveyor or carriers have L shaped fingers. A glass plate is usually about a � inch thick (a lot thicker than the actual board). With L shaped fingers the bottom of the gl

interchangeable stencil frame systems

Electronics Forum | Sat May 05 10:18:38 EDT 2001 | johnthor

yeah, we use the low static stuff too... except when the purchasing assistant did the company a "favor" and sought out something cheaper. Those times you want a big stick! The color confusion is because of the rose colored glasses that I wear. Joh

SMT Product Line Expansion

Electronics Forum | Thu Apr 28 15:45:21 EDT 2005 | stepheniii

What about things like tweezers, vaccuum pens, and hand held optical tools? I mean jewelers loupes and magnifing glasses. You might want to carry two classes. Economy models at low cost and higher end more expensive ones. Stephen

Tinning gold plated leads ( DIP, etc)

Electronics Forum | Mon Mar 20 09:24:38 EST 2000 | John Sipper

1. Spec references for max allowable untinned gold near glass seal and case body? 2. Low cost mechanical dip system to facilitate tinning of DIP parts. (Low volume; currently using hand solder iron techniques to allow for max coverage without bridg

QFN / BGAs with Water-Soluble Fluxes, Bad Practice?

Electronics Forum | Tue Mar 24 20:25:18 EDT 2009 | davef

It is very common to use low residue flux with low-standoff parts. On the other hand, sure you can clean under low-standoff parts. We've talked about this previously. Search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums

Re: Laminate base material

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

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