This invention uniquely partitions the pBIST ROM for storing program and data information. The plug housing has at least one plug-type connector with at least two plugging elements. , a finlike structure can suffer structural damage during chemical mechanical polishing steps. The signal is filtered with a filter having at least one high-pass filter and one low-pass filter connected in parallel. In a third control state at least two of said LEDs are connected in parallel while also at least two of said LEDs are connected in series. It comprises saponification of said alkylene terephthalates with an aqueous sodium solution, adding a sufficient volume of water to ensure solubilization of the entire alkaline metal terephthalate produced in the reaction medium liquid phase and crystallisation of the sodium terephthalate by concentration of said liquid phase.