Resistive memory array using P-I-N diode select device and methods of fabrication thereof
View Patent ↗An electronic structure includes a resistive memory device, and a P-I-N diode in operative association with the resistive memory device. A plurality of such electronic structures are used in a resistive memory array, with the P-I-N diodes functioning as select devices in the array. Methods are provided for fabricating such resistive memory device—P-I-N diode structures.
1. An electronic structure comprising:
a resistive memory device; and
a P-I-N diode in operative association with the resistive memory device, wherein the electronic structure is a pillar, wherein the P-I-N diode comprises a body comprising a first region of a first selected conductivity type, a second region of a second selected conductivity type opposite the first conductivity type, and an intrinsic region between the first and second regions, wherein the first and second regions and the intrinsic region are stacked in a column, wherein the first region is linearly elongated such that the first region forms a first selected conductivity type region of a second P-I-N diode of a linear plurality of P-I-N diodes and each of the first region, the second region and the intrinsic region of each P-I-N diode of the linear plurality of P-I-N diodes are of similar dimensions to each of the first region, the second region, and the intrinsic region of another P-I-N diode of the linear plurality of P-I-N diodes, and wherein the first region that is linearly elongated corresponds to a bit line associated with the resistive memory device.
2. The electronic structure of claim 1 wherein the resistive memory device and P-I-N diode are connected in series.
3. The electronic structure of claim 2 wherein the resistive memory device comprises a first electrode, an insulating layer on and in contact with the first electrode, and a second electrode on and in contact with the insulating layer.
4. The electronic structure of claim 1 , wherein the body of the P-I-N diode comprises epitaxial material.
5. The electronic structure of claim 1 , wherein the body of the P-I-N diode comprises silicon.
6. A resistive memory array comprising:
a plurality of bit lines;
a plurality of word lines; and
a plurality of memory structure pillars, each connecting a bit line and a word line, each memory structure pillar comprising a resistive memory device and a P-I-N diode in operative association with the resistive memory device, wherein the P-I-N diode comprises a body comprising a first region of a first selected conductivity type, a second region of a second selected conductivity type opposite the first conductivity type, and an intrinsic region between the first and second regions, wherein the first and second regions and the intrinsic region are stacked in a column, wherein the first region is linearly elongated such that the first region forms a first selected conductivity type region of a second P-I-N diode of a linear plurality of P-I-N diodes and each of the first region, the second region and the intrinsic region of each P-I-N diode of the linear plurality of P-I-N diodes are of similar dimensions to each of the first region, the second region, and the intrinsic region of another P-I-N diode of the linear plurality of P-I-N diodes, and wherein the first region that is linearly elongated corresponds to one of the bit lines.
7. The resistive memory array of claim 6 wherein the resistive memory device and P-I-N diode are connected in series.
8. The resistive memory array of claim 7 wherein the resistive memory device comprises a first electrode, an insulating layer on and in contact with the first electrode, and a second electrode on and in contact with the insulating layer.
9. The resistive memory array of claim 6 , wherein the plurality of memory structure pillars are arrayed such that each memory structure pillar of the plurality of memory structure pillars is separated from other memory structure pillars by a width of a memory structure pillar.
10. An electronic structure comprising:
a pair of resistive memory devices; and
a pair of P-I-N diodes, a P-I-N diode of the pair of P-I-N diodes in operative association with a respective resistive memory device of the pair of resistive memory devices, wherein the electronic structure is a pillar, wherein a P-I-N diode of the pair of P-I-N diodes comprises a body comprising a first region of a first conductivity type, a second region of a second conductivity type opposite the first conductivity type, and an intrinsic region between the first and second regions, wherein the first and second regions and the intrinsic region are stacked in a column, and wherein the first region is linearly elongated such that the first region forms a first selected conductivity type region of a second P-I-N diode of a linear plurality of P-I-N diodes and each of the first region, the second region and the intrinsic region of each P-I-N diode of the linear plurality of P-I-N diodes are of similar dimensions to each of the first region, the second region, and the intrinsic region of another P-I-N diode of the linear plurality of P-I-N diodes, and wherein the first region that is linearly elongated corresponds to a bit line associated with the resistive memory devices.
11. The electronic structure of claim 10 wherein the resistive memory device and P-I-N diode are connected in series.
12. The electronic structure of claim 10 wherein the resistive memory device comprises a first electrode, an insulating layer on and in contact with the first electrode, and a second electrode on and in contact with the insulating layer.