Title: Two-dimensional transfer in charge transfer devices

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Abstract: Charge transfer devices of either the charge coupled or bucket brigade type are described which allow movement of charge carriers in two noncollinear directions in the surface plane of the device. One level of metallization is utilized to provide the appropriate surface potential for charge transfer in the storage medium. The electrode pattern comprises charge transfer electrodes which are coupled diagonally to one of a plurality of conduction paths. Directionally is aided by asymmetric potentials under each electrode which may be formed by localized regions of fixed charge at the surface of the storage medium. Horizontal or vertical transfer is determined by the sequence of biasing the conductive paths. In one embodiment, the electrode pattern is formed by strips of conductive material shaped in the form of diagonally overlapping quadrilateral members and positioned so as to form an array resembling the normal two-dimensional array of discrete transfer electrodes.


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