Electronics Forum: copper pcb (Page 1 of 59)

raw copper on pcb

Electronics Forum | Thu Jun 07 05:11:42 EDT 2012 | cp38260

Hi, I have pcbs (Duroid/RT 5880) with raw copper, soldered in vapour-phase chamber at 230 degrees Celsius. During soldering, copper gets tarnished. Cleaning with Vigon A250 removes the tarnished layer. Indeed, in the VigonA250 techn. datasheet it is

beryllium copper

Electronics Forum | Tue Mar 14 12:56:07 EST 2006 | robhs

Q: Is anyone aware of any solderability issues that may exist when soldering beryllium copper parts (in this case spring contacts) to a PCB using standard Pb63/Sn37 solder paste/wire?

Thickest internal copper layer?

Electronics Forum | Thu Jan 10 13:24:36 EST 2013 | kenkay

What is the thickest internal copper layer we could get in a pcb?

copper land delamination

Electronics Forum | Mon Nov 15 14:40:38 EST 1999 | Bob Smith

Hi, I have a problem I've never seen before so I hope someone here can help. A recent batch of PCBs arrived where the copper lands delaminate with a small pull. Normally you have to pull pretty hard and the whole land comes off the substrate. These

Verifying requested copper weight

Electronics Forum | Tue Apr 24 10:44:05 EDT 2018 | lucianooo

Hi, Uusually for professional PCB factory they can supply "By microscopic slicing" services so that you can make sure the cooper thickness is excatly like you need. If factory is small then usually don't have this services,and normally can not test

Verifying requested copper weight

Electronics Forum | Sun Sep 09 21:59:36 EDT 2018 | sanneyyu

we are a PCB house, you can add some patterns at breaktabs or board edge, this can help you easily verify copper weight for every circuit layer.

PCB copper to disipate heat

Electronics Forum | Thu May 02 20:56:25 EDT 2002 | clunier

I remember reading a magazine article a few years ago that discused using the copper area of a pcb to transfer heat away from large SMT devices. Does anyone know of this article or something similar that I can obtain. The article covered copper area,

fine pitch on thick copper

Electronics Forum | Mon Dec 20 07:58:02 EST 1999 | pascal MATHIEU

hello guys ; we are using a fine pitch component(0.65mm) on a thick copper PCB (Cu = 90�m) ; in this case we notice that we are in the process'limits , because the different supplier of the PCB are not able to ensure a good stability of it's process

PCB copper to disipate heat

Electronics Forum | Thu May 09 17:19:28 EDT 2002 | davef

Can�t help you with the article that you read. Other places to start are: * 2221, 7.2 Heat Dissipation Considerations, 7.3 Heat Transfer Techniques, and 8.1.10 Heat Dissipation * 2222, 9.1.2 Thermal Relief In Conductor Planes

to seal exposed copper layers

Electronics Forum | Fri Oct 20 14:13:32 EDT 2000 | DENNIS XIONG

Dear all, We have a PCB design mistake that causes exposed copper layers on the edges of breakaway locations. Although we fixed the design, but we already made a lot of boards plus many made before we found the problem. I wonder if any one have some

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