RU2006075C1 - Method of recording-reproduction of digital information by electric field on medium of injection type - Google Patents

Abstract

FIELD: information storage. SUBSTANCE: recording of digital information is conducted by bipolar pulse electric field via multielement system of electrodes on rotating disc medium made of semiconductor material coated with thin dielectric film. Reproduction is performed via same system of electrodes by recognition of difference of capacitive coupling between electrodes and disc depending on polarity of voltage of recording pulse. EFFECT: improved recording-reproduction characteristics. 1 dwg

Description

 The invention relates to techniques for the accumulation of information and can be used in computer technology, in devices for processing digital information.

 A known method of magnetic recording / playback of digital information on a disk medium, in which the recording is carried out by peripheral (with low intensity) regions of the dipole by the nature of the magnetic field generated by the recording head, the axis of which is parallel to the surface of the disk medium.

 In the known method, the effect of recording information arises as a result of a change in the orientation of the magnetic domains in the working layer of the carrier having ferromagnetic properties, which imposes certain restrictions on the permissible number of rewriting events. The disadvantages include the fact that the method does not allow overwriting information without first erasing previously recorded data, and it also has a low recording density.

 The closest in technical essence and the achieved result is a known method in which a storage medium consisting of a substrate of semiconductor material "p" or "n" type of conductivity, coated on one side with a dielectric film, and with the other conductive film, and the electrode is relatively moved , the carrier through the electrode is exposed to an electric field modulated in accordance with the information signal before recording information elements with a changed value of the capacitive coupling between at the electrode and the information carrier, and reproduction is performed by scanning the surface of the carrier with an electrode and recording changes in the electric capacitance between the electrode and the sections with and without recording information elements on the information carrier.

 The disadvantage of this method is the low speed of recording / reproducing information, low recording density and the impossibility of subsequent rewriting of information without erasing previously recorded data.

 The purpose of the invention is the provision of multiple rewriting without first erasing previously recorded information and increasing the recording density.

 In order to achieve the goal in a method for recording / reproducing digital information by an electric field on an injection-type medium, in which the information is digitally encoded during recording, onto the information track of the medium from the side of the dielectric layer covering the semiconductor substrate of the "p" or "n" type of conductivity in accordance with the recorded information, they locally act on the electric field of the polarity electrode necessary to form local regions of the depletion layer on the carrier one, providing a change in the electric capacitance between the electrode and the carrier, which are mutually moving, and in the process of reproducing information, mutually move the electrode and the carrier along the information track and reproduce the recorded information by decoding changes in the electric capacitance, during recording, the disk medium is placed with air gaps between the conductive fixed surfaces, recording is carried out by an electrode, which provides the simultaneous formation of independent electrical fields on several parallel information tracks, the capacitive coupling directly between the electrode and the conductive surfaces is established weaker than the capacitive coupling between the electrode and the disk medium, which is weaker than the capacitive coupling between the disk medium and the conductive surfaces, the disk medium is rotated and the polarity of the coding pulses of information, providing the creation or elimination of the depleted layer in local areas of the semiconductor layer along the infor Discount tracks, and during playback carrier is driven to rotate and perform reproduction of the recorded information through the same electrode as in the recording, and decoding to produce an electrical capacitance between the electrode and the conductive surfaces.

 The essence of the method is illustrated by the example of the device that implements the proposed method.

 A device that implements the method is shown in the drawing and contains a storage medium in the form of a disk 1, conductive fixed surfaces in the form of a diskette 2 of a storage medium, an electrode 3 made in the form of a comb of several unconnected electrically pin electrodes, a record / playback switch block "4, the recording unit 5, the playback unit 6, the motor 7, the positioning unit of the holder 8 of the electrodes 3, the power supply 9.

 A device that implements the method operates as follows.

 When recording, the information signal enters the recording unit 5, where pulses of positive or negative polarity of the required level are formed, which are fed through the recording / playback switch unit 4 (recording mode) to the electrode 3 in the form of a comb of electrically non-connected pin electrodes. Recording can be done either by each pin of the electrode 3 individually, or simultaneously by all pins of the electrode, which can significantly increase the speed and density of recording information.

 Rotation from the electric motor 7 is transmitted to the information carrier 1 in the form of a disk, which is placed between the conductive surfaces (planes of the disk 2) so that air gaps remain on both sides of the disk and the planes of the disk. The capacitive coupling directly between the electrode 3 and the planes of the diskette 2 is established weaker than the capacitive coupling between the electrode and the storage medium 1, which is weaker than the capacitive coupling between the storage medium and the planes of the diskette. On a rotating information carrier 1, there arise or not (depending on the polarity of the voltage of the recording information pulse) regions of the semiconductor layer depleted in the main carriers, as a result of which the electrical capacitance of the system electrode 3-information carrier of the 1-plane diskette 2 is changed. the position of the electrode holder relative to the information tracks of the information carrier is set. The required voltage for all units of the device are supplied from the power supply 9.

 When playing back the recorded information, a change in the electric capacitance of the system occurs; the electrode 3-data carrier of the 1-plane diskette 2 during rotation of the information carrier depending on the presence or absence of the semiconductor layer depleted in the main carriers during recording in various local areas of the information medium 1. During playback, the the same electrode as during recording and its pins are located along the corresponding information tracks of the information carrier 1. Electronic system The electrode 3-information carrier of the 1-plane diskette 2 is connected via a switch (recording / reproducing switch block) 4 (playback mode) to the oscillating LC circuit of the electronic circuit of the reproducing unit 6, whereby reproduced informational pulses with standard voltage levels are generated in it .

When implementing the device, an information carrier in the form of a disk made of silicon ("p" or "n" conductivity) with a dielectric layer Ba _x Sr _1-x TiO _{3 was used} . The results: recording density 8x10 ⁴ bit / mm ² , storage time 10 ⁴ hours, the number of rewriting events 10 ⁷ , the speed of information retrieval through one pin of the electrode 10 ⁵ bis / s. (56) A series of "Prospects for the Development of Computer Engineering" in 11 volumes, ed. Yu. M. Smirnova, M., "Higher School", 1989, v. 9. p. 175.

 German patent N 3041414, class G 11 B 9/04, 1983.

Claims (1)

 METHOD FOR RECORDING-PLAYING DIGITAL INFORMATION BY ELECTRIC FIELD ON THE INJECTION TYPE CARRY, in which during recording the information is encoded in digital form onto the information track of the carrier from the side of the dielectric layer covering the semiconductor substrate of p- or n-type conductivity in accordance with the locally recorded conduction type act with the electric field of the polarity electrode necessary for the formation on the carrier of local regions of the depleted layer of the semiconductor, providing a change in the elec ternary capacitance between the electrode and the carrier, which are mutually moving, and during the reproduction of information, mutually move the electrode and the carrier along the information track and reproduce the recorded information by decoding changes in the electric capacitance, characterized in that, in order to ensure multiple rewriting without first erasing the previously recorded information and increase the recording density, during recording, the disk medium is placed with air gaps between the conductive fixed surfaces, recording is carried out by an electrode that provides the simultaneous formation of independent electric fields on several parallel information tracks, the capacitive coupling directly between the electrode and the conductive surfaces is established weaker than the capacitive coupling between the electrode and the disk medium, which is weaker than the capacitive coupling between the disk medium and the conductive surfaces, the disk medium is rotated and the polarity of the coding pulses of inform This ensures the creation or elimination of the depletion layer in the local areas of the semiconductor layer along the information tracks, and during playback, the carrier is rotated and the recorded information is reproduced through the same electrode as during recording, and decoding is performed for the electric capacitance between the electrode and the conductive surfaces.

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