Programmable memory cell having semiconductor diodes
First Claim
1. An integrated electrically programmable read only memory cell having at least a first and a second semiconductor diode in back-to-back arrangement, whereinthe first diode is a planar p-n junction formed between two superimposed regions of which at least one region extends on the upper part of a semiconductor body and the second diode is a lateral p-n junction formed between two co-planar zones of a thin layer of a semiconductor material extending locally on an insulating layer covering the said body;
- a window in the said insulating layer ensuring a contact between the said layer and the said body at the site of the first diode, andthe area of the junction of the second diode being substantially smaller than that of the first.
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Abstract
Integrated electrically programmable read only memory cell having at least two back-to-back diodes.
A first diode is formed by a planar junction (7) between two superimposed regions (2, 6), the second diode is programmable and is formed by a lateral junction (11) between two coplanar zones (9, 10) of a thin semi-conductor layer isolated from the body by an insulating layer (8) having a contact aperture (18).
48 Citations
9 Claims
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1. An integrated electrically programmable read only memory cell having at least a first and a second semiconductor diode in back-to-back arrangement, wherein
the first diode is a planar p-n junction formed between two superimposed regions of which at least one region extends on the upper part of a semiconductor body and the second diode is a lateral p-n junction formed between two co-planar zones of a thin layer of a semiconductor material extending locally on an insulating layer covering the said body; -
a window in the said insulating layer ensuring a contact between the said layer and the said body at the site of the first diode, and the area of the junction of the second diode being substantially smaller than that of the first. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification