Improvements in and relating to data storage

摘要

1,036,295. Electric digital data-storage. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 26, 1965 [April 27, 1964], No. 17461/65. Heading G4C. Data stored as deformations in the surface of a conductive layer of a record member comprising a thermoplastic layer sandwiched between the conductive layer and an insulating layer, is read by scanning the surface of the conductive layer with an electron beam and detecting electrons scattered from said surface, a leakage path being provided to prevent charge accumulation on the surface. The electron beam is moved across the surface in a raster in synchronism with the movement of the electron beam of a CRT display in a larger raster. Electrical signals from the detector of the scattered electrons control the beam intensity in the display CRT, and may be fed to a computer. Data is stored by depositing a charge pattern on the insulating layer using an electron beam (which may be produced by the same gun and deflectors as the reading beam if the record member is rotated between writing and reading), and passing a heating current through the conductive layer.