A searching method for determining a function associated with a memory block of a memory of a computer system and the computer system thereof are disclosed. A subscriber to voicemail services provides a voicemail system with an address or a number of addresses to which the subscriber may forward voicemail messages for extended storage. 1 to 100 \u03bcm of an average value in terms of maximum longer diameters, to 100 parts by weight of the resin. The first high-voltage NMOS is connected to the second terminal, having a gate through which a second signal is input. The pump controller: determines pump activation periods based on calibration data stored in a pump controller memory; tracks pump usage and adjusts the activation period to compensate for pump wear as the pump ages; disables the pump if conditions exists that preclude operating the pump; monitors product levels, and reports pump status to the system controller. Consequently, diffusion of nitrogen and nitrogen compounds in vias formed in the low-k dielectric layer is significantly suppressed, so that in a subsequent photolithography step interaction of nitrogen and nitrogen compounds with the photoresist is remarkably reduced.