The present invention carries out cache management in such a manner that the management region required for cache management does not increase, and neither does the performance decline. The server may execute software configured to enable a wireless device to communicate with multiple wireless access points of a network during a communications session. The cavity is thereby covered in the process. The compound is then sintered at a temperature in the range of 800 to 950 C. Exposed portions of the cured polyimide precursor material are removed for exposing portions of the pole tip layer.