Memory array, method for manufacturing memory array, memory array sheet, method for manufacturing memory array sheet, and wireless communication apparatus

A memory array comprising:

• a plurality of first wires;
• at least one second wire crossing the first wires;
• and
• a plurality of memory elements provided in correspondence with respective intersections of the first wires and the at least one second wire and each having a first electrode and a second electrode arranged spaced apart from each other, a third electrode connected to one of the at least one second wire, and an insulating layer that electrically insulates the first electrode and the second electrode and the third electrode from each other, the first wires, the at least one second wire, and the first wires, the at least one second wire, and the memory elements being formed on a substrate,
• either the first electrode or the second electrode being connected to one of the first wires,
• at least one of the memory elements having an applied layer in an area between the first electrode and the second electrode,
• the memory elements including two kinds of memory elements different from each other in electrical characteristics between the first electrode and the second electrode by the applied layer,
• information to be recorded being determined by arrangement with any combination of the two kinds of memory elements,
• wherein:
• the applied layer is formed of a semiconductor material applied to the area between the first electrode and the second electrode and is a first semiconductor layer or a second semiconductor layer, the first and the second semiconductor layers being different from each other in electrical characteristics,
• out of the two kinds of memory elements, one kind of memory element is a memory element having the first semiconductor layer, whereas another kind of memory element is a memory element having the second semiconductor layer,
• the first semiconductor layer and the second semiconductor layer each contain carbon nanotubes as the semiconductor material,
• a concentration of carbon nanotubes of the second semiconductor layer is higher than a concentration of carbon nanotubes of the first semiconductor layer, and
• the one kind of memory element and the other kind of memory element record respective pieces of information different from each other by a difference in a current value between the one kind of memory element and the other kind of memory element when a certain voltage is applied to the third electrode of the one kind of memory element and the third electrode of the other kind of memory element, the current value being a current value passing between the first electrode and the second electrode of each of the one kind of memory element and the other kind of memory element.

A memory array sheet comprising a combination of a plurality of memory arrays formed on a sheet, each of the plurality of memory arrays comprising:

• a plurality of first wires;
• at least one second wire crossing the first wires;
• and
• a plurality of memory elements provided in correspondence with respective intersections of the first wires and the at least one second wire and each having a first electrode and a second electrode arranged spaced apart from each other, a third electrode connected to one of the at least one second wire, and an insulating layer that electrically insulates the first electrode and the second electrode and the third electrode from each other, the first wires, the at least one second wire, and the first wires, the at least one second wire, and the memory elements being formed on a substrate,
• either the first electrode or the second electrode being connected to one of the first wires,
• at least one of the memory elements having an applied layer in an area between the first electrode and the second electrode,
• the memory elements including two kinds of memory elements different from each other in electrical characteristics between the first electrode and the second electrode by the applied layer,
• information to be recorded being determined by arrangement with any combination of the two kinds of memory elements, wherein
• the applied layer is a semiconductor layer formed of a semiconductor material applied to the area between the first electrode and the second electrode,
• out of the two kinds of memory elements, one kind of memory element is a memory element having the semiconductor layer, whereas another kind of memory element is a memory element not having the semiconductor layer,
• the other kind of memory element does not have any semiconductor layer applied to the area between the first electrode and the second electrode,
• the one kind of memory element and the other kind of memory element record respective pieces of information different from each other by presence or absence of the semiconductor layer, and
• respective pieces of information recorded in the memory arrays formed on the sheet is different from each other.