MEMORY CELL COMPRISING A FLOATING GATE DEVICE

    公开(公告)号:DE3279356D1

    公开(公告)日:1989-02-16

    申请号:DE3279356

    申请日:1982-08-25

    Applicant: IBM

    Abstract: A memory system is provided wherein extended injection-limited programming techniques attain a substantially uniform programming behavior from an ensemble of fabricated devices or cells to provide the maximum obtainable voltage threshold shift within a minimum time period. in order to produce these desired results, a floating gate (FG) of a device (10A') is charged by applying to the control gate (CG) of the device a first voltage during a portion of this time period which produces an accelerating field in a dielectric layer disposed adjacent to the floating gate (FG) and then applying to the control gate (CG) during the remaining portion of this time period a second voltage of greater magnitude than that of the first voltage prior to or when the accumulation of charge on the floating gate causes a retarding field to be established in the dielectric layer.

    4.
    发明专利
    未知

    公开(公告)号:DE2440481A1

    公开(公告)日:1975-04-24

    申请号:DE2440481

    申请日:1974-08-23

    Applicant: IBM

    Abstract: Disclosed is a method for the manufacture of composite thin films useful among other applications as electronic microcircuit interconnections, fuses, and contacts, terminal pads and voltage distribution ring metallurgy comprising in carrying out an integral circuit fabrication process the steps of first depositing a barrier layer of antidiffusion material, such as chromium, followed by superimposing thereon a film of highly conductive metals susceptible to corrosion and followed by the deposition of a highly corrosive resistant metal film. A subtractive etch pattern is formed in the composite metal film followed by heating the structure to an elevated temperature for a predetermined period of time so that the uppermost layer of the composite flows by diffusion over the edge section to protect the conductive metal film from corrosive effects.

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