Abstract:
A conductor-insulator-semiconductor (CIS) information storage device employing a semiconductor substrate of one-conductivity type with a surface-adjacent region of an opposite-conductivity type as the storage media is disclosed. Means are disclosed for storing information in the form of electrical charges in a plurality of charge storage regions electrically isolated from each other by non-conducting barrier regions. Electrical charges are transferred from one storage region to another by controllably removing the non-conducting barrier regions therebetween. Various means for storing and transferring electrical charges are disclosed.
Abstract:
Method and apparatus for moving selected electrical charges along the surface-adjacent portions of a semiconductor substrate are described. In one embodiment, a conductor-insulatorsemiconductor structure including an array of cellules formed in the insulator layer substantially defines potential wells in the semiconductor for storing electrical charges. Electrical charges are stored in the potential wells by an electric field produced from a voltage applied to an overlying conductor member. By arranging the cellules in rows and columns with row-associated ''''hold'''' lines, row-associated ''''charge transfer channels'''' and column-associated transfer means, selected electrical charges may be transferred along the surface-adjacent portions of the semiconductor underlying the charge transfer channels while other charges continue to be stored. Electrical charges representative of analog or digital information may be selectively introduced or removed from the potential wells by a single column-associated transfer means.
Abstract:
A high frequency CIS capacitance device having a substrate of one conductivity type provides a capacitance for a high frequency signal applied across a pair of capacitance electrodes thereof which is dependent on the voltages applied to a pair of control electrodes, each connected to the surface adjacent region of the substrate underlying one of the pair of capacitance electrodes of the device through a respective channel region of opposite conductivity type. Means are provided for alternatively establishing one or the other channel regions of opposite conductivity type to establish values of capacitances dependent on the voltages applied to the control electrodes. Composite devices are formed of elemental devices such as described in which the capacitance of the composite device is the sum of the capacitance of the elemental devices and is variable in discrete increments to provide a large number of discrete values of capacitance in response to digital signals applied to a minimum number of control electrodes connected thereto.
Abstract:
A magnetic transducer for read-write applications is disclosed in which a composite core having two closely spaced legs is provided with each leg having one layer of magnetic material of higher permeability and lower saturation flux density than the second layer of that leg. The read-write conductor means is positioned between the two legs and is thereby inductively coupled to the core. The higher permeability layer is narrow in a direction perpendicular to both the length of the leg and the thickness of the layer, is adjacent the conductor means and is saturated at flux densities encountered in writing so that the wider lower permeability outer layers of the two legs are effective during writing and the higher permeability narrower layers are effective or dominant during reading. In a modification, a composite shim is employed in the gap of a more conventional stacked lamination head to obtain some of the advantages of the present invention.