Integrated device comprising a structure for electrostatic transport of dielectric particles generated in devices for actuating hard discs, and electrostatic transport method

摘要

An electrostatic transport structure (25) is formed by a plurality of concentric conductive regions (26a, 26b, 26c) to which biasing pulse trains (V1, V2, V3) are supplied. Each biased conductive region generates an electric field attracting any dielectric particles. The pulse trains supplied to immediately adjacent conductive regions are phase-shifted of a predetermined time and in a direction linked to the desired direction of movement for the electrostatic particles. Voltage pulses are sent to each conductive region delayed with respect to voltage pulses sent to an immediately preceding conductive region in the direction of desired movement and advanced with respect the voltage pulses sent to an immediately successive conductive region.