FAQ about PCBs – What are the material characteristics to look for when selecting material? HD

FAQ about printed circuit boards - PCB. The main ones that we would consider first include: CTE - a measure of how much the material expands when heated, Tg / GLASS TRANSITION TEMPERATURE - The Tg value is the temperature at which the material changes from a reasonably stiff glass-like material to a more elastic and bendable plastic-like material, Td / DECOMPOSITION TEMPERATURE - This is a measure of the degredation of the material. T260 / T288 / TIME TO DELAMINATION This is the method to determine the time when the thickness of the PCB is irreversibly changed at a predefined temperature (260 or 288 in this case)– i.e. when the material expands to such a degree that it delaminates.