Electronics Forum: finer (Page 1 of 7)

Wiping Fixtures

Electronics Forum | Wed Mar 15 21:52:33 EST 2000 | Chuck Garth

A long time ago I had seen wiping fixtures in which the circuit board was placed and fingers bent the leads on the components. Can anyone supply me with their design. I can almost see them work but am missing on the finer points

Stencil Aperture Reduction Guidelines

Electronics Forum | Wed Dec 15 09:18:00 EST 1999 | Chris May

Can people let me know what reductions are typical for stencils. This can obviously be affected by the technology of the board, but for chip caps and R's do you use 1:1 and only reduce for finer pitch stuff ? Your help would be appreciated. Regards

Re: measuring pitch

Electronics Forum | Mon Jun 07 22:30:28 EDT 1999 | Dave F

I was wondering what measurements are used to define pitch? Frank: John's correct with the most common definition, but there can be others, depending on your perspective. TTYL Dave F Pitch. The center-to-center spacing b

Squeegee Speed

Electronics Forum | Thu Feb 18 17:49:28 EST 1999 | Ryan Jennens

Hey all- My question is this: My stencil printer operator has said that he has to wipe our 6-mil stencil each pass to get the paste in the 20-mill pitch aperatures for a QFP to release well. We are using Amtech NC-559 type 3 paste with 89.5% metal

Re: Desperately looking for help

Electronics Forum | Wed Dec 13 20:39:04 EST 2000 | Dave F

Hello Dr. Fuzz, this is Dave. I'm right in the middle of giving myself an appendectomy and could use your advice on some of the finer points. Let's see, I've made a lateral cut across my stomach and for the life of me [heh heh] can't remember if th

Cooling rate after reflow soldering

Electronics Forum | Fri Feb 13 03:26:07 EST 1998 | Brian S. Bentzen

Hi , The 4th stage in reflow soldering, the cool-down, I find is often over looked. A rapid cooling rate should give finer lead and tin structure with more bindings and thereby result in stronger solder joints. Can anybody give me some information

BGA solder joint VS. X-Ray machine capability

Electronics Forum | Mon Nov 12 11:05:43 EST 2001 | vbutani

You can get systems at various performance levels depending on your budget. The low cost systems are a great way to start off and then you can upgrade to a higher performance unit when you move to finer pitch components. Check out the VJ-1000LP at h

Soltec Parts - cheap?

Electronics Forum | Thu Feb 16 11:00:32 EST 2006 | fredc

We have sold Soltec 4G1-105 V solder fingers for $9.95 others are available. The filter that you mentioned with the too coarse screen, could a finer screen be installed in it? Is the shape of the screen regular (square or round that a die could be ma

HMP hand soldering.

Electronics Forum | Sat Sep 03 13:01:36 EDT 2011 | waveroom

I'm thinking that your soldering irons are not up to the task. take a tip temperature measurement of the iron prior to and during soldering process. With high temp solder alloys you need an iron that provides continuous temperature at the tip. Doing

Nitrogen gas and Tombstone defect

Electronics Forum | Tue Nov 29 14:55:17 EST 2011 | jlawson

N2 is a reflow process widener so to speak, for leaded reflow less of a impact, for LF more impact, and if using finer LF solder pastes T4,T5 and smaller paste deposits generally, it helps widen window for flux in paste in oxide protection during soa

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