FR4 PCB Laminate

FR4 Epoxy Laminate:-

This is the standard laminate used in our sector of the industry. We carry stocks of all the main variants. The standard thickness used is 1.6mm, but we also stock 0.8mm, 1.0mm, 1.2mm, 2.0mm, 2.4mm, and 3.2mm. The most common copper thickness is 35 microns or 1oz square foot but 70 microns 2 oz square Ft is regularly used for higher current applications. Its closely related to FR5 which is the old high temperature version, but has now been replaced by the more common BT Epoxy type. Not quite so widely used any more are the G10 and G11 Laminates. They are effectively the old Non flame retardant versions of FR4 and FR5. The last epoxy laminate worth a mention is the FR3 grade. Its a cross between FR2 and FR4 as it's constructed from the epoxy resin but using internal strengthening paper sheets instead of the glass cloth. It had the advantage of being easier to punch for the traditional punch and crunch mass production houses. Listed on the links are two tables of figures from our laminate specification sheet which include data on, dielectric constant and the thermal conductivity amongst other things. As tested in accordance with Mil-s-13949, UL etc.

FR4 Data Sheet	BT Epoxy Data


Other Laminates	Technical Main