Podcast Ep.19: PCB Depaneling
PCB Depaneling is the process of breaking the individual PCBs out of the panel that is used to assemble the boards and is typically one of the very last steps assembled circuit boards go through before they are shipped.
In this episode Dave Wilcox, CAM engineer at CircuitHub, joins us again to educate us on bare printed circuit board materials....think prepreg, laminate etc.
-FR4 is the most common, widely available PCB material. It is a woven glass cloth filled with epoxy resin the is bonded together to form sheets of prepreg and laminate
-If a circuit board were a sandwich, the laminate is the bread and the prepreg is the filling.
-We discuss differences in FR4 used for lead vs lead free process.
-What does high TG and the different TG ratings mean?
-We briefly touch on some more exotic materials.
-The laminate comes in different thicknesses laminated with different copper weights that are used to build different stackups.
-Copper foil is used on the outside and also come in different weights.
-What does is mean to be UL approved and how to PCB fabs get UL approval?
-Sometimes more sheets of prepreg are used to get greater resin content.
-How do the different materials arrive at the PCB fab?
-Pet peeves - the news and printers.