Electronics Forum: cold flow (Page 1 of 6)

cold joint on 1 lead of IC

Electronics Forum | Mon Feb 12 10:02:18 EST 2007 | rgduval

A little late to the party here, sorry... Has the joint been verified as a cold solder joint? That is, visually confirmed that it looks like cold solder, and, perhaps, xrayed to confirm the solder status? X-raying may sound a bit extreme, but you'

Re: Multilayer PTFE Boards

Electronics Forum | Mon Dec 18 22:36:37 EST 2000 | Charles Harper

The major problems are poor layer to layer bond strength(due to surface tension of most fluoropolymers),and poor cold flow,or dimensional creep of these materials.Please also click on Chapter Author Konsowski,listed above.E-mail form will pop up when

Re: Multilayer PTFE Boards

Electronics Forum | Wed Dec 20 10:17:10 EST 2000 | markt

What steps are presently being taken by manufacturers to deal with problems such as layer bond strength, cold flow, and dimensial creep at present? Are there substantial materials research efforts, that you are aware of, in progress that address thes

Re: Adhesion of conformal coating to plastic components

Electronics Forum | Tue Jun 02 17:36:43 EDT 1998 | Chris Fontaine

| | We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not

Re: Adhesion of conformal coating to plastic components

Electronics Forum | Tue Jun 02 18:01:47 EDT 1998 | Earl Moon

| | | We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is no

Mechanical stripper for fine magnet wire

Electronics Forum | Thu Sep 04 19:20:39 EDT 2003 | severs

Fine magnet wire responds well to abrasion stripping. Here's one I've used: http://www.carpentermfg.com/magnet.htm Teflon requires a different kind of stripper called a twin blade rotary stripper or a precision die stripper because it's subject to

Re: Adhesion of conformal coating to plastic components

Electronics Forum | Tue Jun 02 15:53:32 EDT 1998 | Earl Moon

| We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not al

Specification for Screw Torques

Electronics Forum | Tue Nov 06 18:39:08 EST 2001 | MikeF

Also, check the website for Assembly magazine, http://www.assemblymag.com, they have some good information on the basics of torque. Determining the "correct" torque value can become very complicated very quickly. The same size screws made from differ

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

Reflow Incoming Chilled Water Temp

Electronics Forum | Tue Jul 13 13:37:23 EDT 2010 | pjc

That's cold compared with this specification from a leading oven mfr.: Flow Rate - 1.0 - 3.0 US gal/min (3.79 - 11.4 l/ min) • Inlet size and pressure - 0.5 in. male NPT; 310 - 483 kPA (45 - 70 psi) • Pressure drop - 200 kPa @ 11.4 l/min (30 psi @ 3

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