Electronics Forum: 2

What is 'toe down configuration' 8.2.5.6 IPC-A-610D?

Electronics Forum | Wed Apr 11 08:36:23 EDT 2007 | davef

IPC-A-610D refers to 'toe down configuration' several times, beyond the 8.2.5.6 that you question. Although none will add to your understanding of 'toe down'. A lead that is 'toe down' is one where the foot of the lead is not parallel to the pad. T

ERSA users 1.8/2.5 nozzle

Electronics Forum | Thu Nov 14 10:24:53 EST 2013 | jaimebc

Recently, we have been experimenting with the 1.8/2.5 nozzle to be able to solder leads that are near an SMD. This pcbs were not design for selective solder, so we are trying to work within this limitations. I found the 1.8 nozzle very hard to insta

Stencil Aperture Size vs Copper Pad Size

Electronics Forum | Mon Aug 08 18:59:49 EDT 2016 | oleksz

What should be solder paste stencil aperture proper size in comparison with PCB copper pad for lead free technology? When designing PCB foortprints I was using solder paste pad undersize of 2.5 mils (0.06mm) per side (solder paste pad size was 2.5 m

Replacement IP2 nozzles/feeders

Electronics Forum | Mon Jul 26 14:16:54 EDT 2010 | jdengler

I don't find this P/N in my list of 2.5mm IP2 nozzles. But we buy from and have bad nozzles repaired by SMT Researh. www.smtresearch.com Jerry

Re: BGA problem: open after reflow

Electronics Forum | Thu Nov 02 22:11:46 EST 2000 | Dason C

Please check with Fab house, what is the thickness of the immersion gold if the gold thicknesss is less than say 2.5 micron, you will found dewetting or open. It is recommend the gold thickness is around 5 micron. Good Luck Dason

Chip Cap Specs

Electronics Forum | Tue Apr 18 17:34:55 EDT 2000 | Chris

Can someone explain what ageing means in terms of chip caps. Capacitor vendors state 7% per decade hour or 2-5-1 per decade hour. What does this mean? I think capacitor values lower over time but what is a decade hour. Thanks, Chris

Humidity of SMT component storage environment.

Electronics Forum | Mon Jan 22 21:24:33 EST 2001 | edger_w

Hi! Mike My company is using the electric dry box and it can controlled less than 10% within 2.5 hours if we are not going to open the door. In normal working environment and it still can't control around 30%. Is it something that you are looking

Bottom side process question

Electronics Forum | Fri Mar 16 15:52:22 EST 2001 | blnorman

We screen print epoxy adhesive, place components then run the board through our adhesive oven (2-5 min cure at 150�C). This is in addition to reflow.

Conformal Coating Machines.........

Electronics Forum | Fri Mar 31 21:33:56 EST 2006 | mrduckmann2000

jdumont, We have a capacitor and an inductor that stick up approx 2.5", any problems with the spray nozzle working around tall objects? Thank you for your input.

Ads Getting Piggy Again

Electronics Forum | Tue Feb 13 15:27:09 EST 2007 | davef

Roland On the main Forum page, the ads in the right margin are back to their old piggyselves again. They've bloated themselves upto 2.5 inches wide from their former svelt 1.5 inches wide. Portion control and exercise, portion control and exercis


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