In my dumb way, I thought they were all compressed to the same thickness; perhaps some imperceptible difference. Is there really an observable difference? ----- Original Message ----- From: "james tornes" To: Sent: Saturday, June 10, 2006 6:32 AM Subject: [EE:] Visually determining PCB layer count >A guy giving a presentation to us was looking at various motherboards > and making assesments like "this is a 4 layer board", "that one is 6 > layers". Can someone actually differentiate with an average eye, > between boards with 4 layers and 6 layers? Thickness of boards can > vary a bit even in-between runs so what's the technique here? > > Jim > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist