<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 27, 2021 at 2:34 PM Brian Willoughby <<a href="mailto:brianw@audiobanshee.com">brianw@audiobanshee.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Naive question: If someone actually ordered a PCB in aluminum - not as a faceplate - would the copper traces deposited on aluminum actually work? Seems like the Electrical Test would fail with everything shorted out.<br>
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By the time you go to the trouble of designing a PCB with the intention of using it as a face plate in aluminum, it seems like you might as well just start with Front Panel Express (Germany and USA). They have the ability to put letting on the face plate via routing or silk screening. I've seen both, and the silk screen seems to work fine. I think that the person ordering it may have specified a clear coat to protect the silk screen.<br></blockquote><div><br></div><div>There's a layer of insulating material between the copper and the aluminum. I cannot remember whether it's FR4 or something else. The main point of the aluminum substrate is to suck away heat, as I understand it. <br><br>I believe when I did my experiment, the aluminum PCB material was still far cheaper than the FPE options available at the time. However it may have been before they were doing or widely known to be doing screening on their panels, I understand that has brought their prices down significantly.</div></div></div>