Patents by Inventor Ali G. Eldin

Ali G. Eldin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4791611
    Abstract: The disclosed chip is suitable for VLSI dRAMS. The memory cell includes a bipolar transistor, a JFET, and a capacitor. The capacitor comprises a MOSFET which is operated only in the accumulation mode. Each cell requires only three lines. On a p-substrate, which comprises the collector of the bipolar, the cell layers are:- an n-well which comprises the channel of the JFET and the base of the bipolar; a p-region, which comprises the gate of the JFET, the emitter of the bipolar, and the bottom plate of the capacitor; an oxide layer; and a conducting layer; arranged as a vertical stack in that order. The latter two layers are the insulator and the top plate of the capacitor. The source and drain of the JFET are respective n+ regions placed one either side of the stack. The n-well can be deep and hence can be compatible with conventional CMOS technology. The chip has full read, write, and refresh capability; is relatively easily manufactured; and can be considerably scaled down without losing performance.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: December 13, 1988
    Assignee: University of Waterloo
    Inventors: Ali G. Eldin, Mohammed I. Elmasry