Electronics Forum: electrical resistance composite (Page 1 of 8)

PCB composition

Electronics Forum | Sat Feb 25 16:17:46 EST 2006 | A.N.other

Hi, been researching archives for PCB composition. Nothing much for what I want. Can anyone direct me/advise of PCB composition, and I mean the full works. Content of base materials, solder resist, chemical compositions of epoxy etc. Much appreciat

Resistance Shift with Lead free

Electronics Forum | Fri Jan 20 08:55:31 EST 2006 | patrickbruneel

Steve, How do you measure the resistance is it by probing the surface? Concerning the alloy there is a straightforward linear correlation between the tin content and the electrical conductivity of the alloy. The higher the tin content in the alloy,

Pneumatic vs Electrical screw drive

Electronics Forum | Sun Oct 27 21:47:25 EST 2002 | raton

Electric drivers are harder to adjust wich keeps production people from messing with 'em. Electrics are resistant to other variables such as air preassure, quality, other air supply users on the same line and so on. I prefered to use all electric e

Re: Resistive epoxy

Electronics Forum | Thu Apr 29 18:48:11 EDT 1999 | Kiet Dang

Hi, Did anyone experience a problem with electrically conductive silver filled epoxy is resistive due to galvanic reaction? I'm having this problem when attaching components to Ni plated housing while conducting an experiment to cost reduction for Au

Conformal Coating Discoloration

Electronics Forum | Mon Aug 29 22:48:09 EDT 2011 | davef

Rich Here's what Humiseal says: Thermal Properties The coating must be able to withstand localized thermal 'hot spots' generated by components. High temperatures can cause short-term changes in coating characteristics, such as softening and lowered e

adhesive for ptfe boards

Electronics Forum | Fri Oct 01 09:25:50 EDT 1999 | Gian.D

Can someone suggest what material I have to use to protect components by electrical discharge on ptfe based boards? It should have high resistivity, thermal stability (-40 +70 'C),perfect adherence on ptfe... Many tahnks

TCR %PPM

Electronics Forum | Thu Aug 16 19:54:12 EDT 2001 | davef

Understanding Temperature Coefficient of Resistance * http://www.riedon.com/temp_coeff_nt.htm * http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html * http://www.rit.edu/~674www/programs/phys273/temp_coeff.html

Cracks on ceramic capacitors.

Electronics Forum | Fri Jun 20 10:27:19 EDT 2003 | Cristiano Dick Smiderle

Hi We are experiencing serious problem with ceramic capacitors. They are with low electrical resistence and the problem is intermittent. We found some of them with micro cracks but not all. What could be the causes for this problem? We are su

How to control and purchase the ESD at production floor

Electronics Forum | Thu Nov 10 22:57:48 EST 2005 | davef

The recommended electrical resistance for flooring from ANSI ESD S 7.1 and ANSI/ESD-S20.20 is

PCB static electric arcing problem

Electronics Forum | Thu Nov 08 16:05:17 EST 2012 | davef

So, what is the battery going to do when you push your 'high voltage' through the 1-2 ohm internal resistance of the 9V battery? How about you doing a Google search on ... esd protection circuit?

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