A method of scoring andor separating a brittle material is described comprising heating a surface of the brittle material along a predetermined path with a laser, then quenching the heated surface with a stream of cooling liquid, such as water, formed by a nozzle. There may be a non-magnetic Ru layer between each first and second section to prevent interlayer coupling. The individual computing devices may thereby be made much smaller effecting savings in space at an Internet service provider location.