Arrays of memory cells individually comprising a capacitor and an elevationally-extending transistor, methods of forming a tier of an array of memory cells, and methods of forming an array of memory cells individually comprising a capacitor and an elevationally-extending transistor
First Claim
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1. An array of memory cells individually comprising a capacitor and a vertical transistor, the array comprising rows of word lines and columns of digit lines, comprising:
- individual of the columns comprising a digit line under channels of vertical transistors of individual memory cells within the array and interconnecting the transistors in that column;
individual of the rows comprising a word line above the digit lines, the word line extending laterally across and operatively laterally adjacent a lateral side of the transistor channels and interconnecting the transistors in that row; and
capacitors of the individual memory cells within the array individually comprising;
a first capacitor electrode directly against a lateral side of an upper source/drain region of individual of the transistors within the array;
a capacitor insulator over the first capacitor electrode; and
a second capacitor electrode over the capacitor insulator.
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Abstract
A method of forming a tier of an array of memory cells within an array area, the memory cells individually comprising a capacitor and an elevationally-extending transistor, the method comprising using two, and only two, sacrificial masking steps within the array area of the tier in forming the memory cells. Other methods are disclosed, as are structures independent of method of fabrication.
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Citations
35 Claims
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1. An array of memory cells individually comprising a capacitor and a vertical transistor, the array comprising rows of word lines and columns of digit lines, comprising:
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individual of the columns comprising a digit line under channels of vertical transistors of individual memory cells within the array and interconnecting the transistors in that column; individual of the rows comprising a word line above the digit lines, the word line extending laterally across and operatively laterally adjacent a lateral side of the transistor channels and interconnecting the transistors in that row; and capacitors of the individual memory cells within the array individually comprising; a first capacitor electrode directly against a lateral side of an upper source/drain region of individual of the transistors within the array; a capacitor insulator over the first capacitor electrode; and a second capacitor electrode over the capacitor insulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An array of memory cells individually comprising a capacitor and a vertical transistor, the array comprising rows of word lines and columns of digit lines, comprising:
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individual of the columns comprising a digit line under channels of vertical transistors of individual memory cells within the array and interconnecting the transistors in that column; individual of the rows comprising a word line above the digit lines, the word line extending laterally across and operatively laterally adjacent a lateral side of the transistor channels and interconnecting the transistors in that row; and capacitors of the individual memory cells within the array individually comprising; a first capacitor electrode directly against a pair of first laterally-opposing sides of an upper source/drain region of individual of the transistors within the array; a capacitor insulator over the first capacitor electrode; and a second capacitor electrode over the capacitor insulator. - View Dependent Claims (13, 14)
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15. An array of memory cells individually comprising a capacitor and a vertical transistor, the array comprising rows of word lines and columns of digit lines, comprising:
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individual of the columns comprising a digit line under channels of vertical transistors of individual memory cells within the array and interconnecting the transistors in that column; individual of the rows comprising a word line above the digit lines, the word line extending laterally across and operatively laterally adjacent a lateral side of the transistor channels and interconnecting the transistors in that row; and the individual memory cells comprising a pillar extending elevationally above the digit lines, the pillar comprising one of the transistor channels and an upper source/drain region of individual of the transistors, the pillar having an elevational thickness that is at least three times that of the one transistor channel; and capacitors of the individual memory cells within the array individually comprising; a first capacitor electrode directly against a pair of first laterally-opposing sides of the pillar and the upper source/drain region of the respective one individual transistor within the array; a capacitor insulator over the first capacitor electrode; and a second capacitor electrode over the capacitor insulator. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An array of memory cells individually comprising a capacitor and a vertical transistor, the array comprising rows of word lines and columns of digit lines, comprising:
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individual of the columns comprising a digit line under channels of vertical transistors of individual memory cells within the array and interconnecting the transistors in that column; individual of the rows comprising a word line above the digit lines, the word line extending laterally across and operatively laterally adjacent a lateral side of the transistor channels and interconnecting the transistors in that row; and capacitors of the individual memory cells within the array individually comprising; an upwardly-open and downwardly-open first capacitor electrode cylinder completely encircling and directly against all peripheral lateral sides of an upper source/drain region of individual of the transistors within the array; a capacitor insulator over radially outer sides and radially inner sides of the first capacitor electrode cylinder; and a second capacitor electrode over the capacitor insulator and over the radially outer sides and the radially inner sides of the first capacitor electrode cylinder. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A row of memory cells individually comprising a capacitor and a vertical transistor, comprising:
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a word line above digit lines, the word line extending laterally across and operatively laterally adjacent a lateral side of channels of vertical transistors of individual memory cells within the row and interconnecting the transistors in the row; and capacitors of the individual memory cells within the row individually comprising; a first capacitor electrode directly against a lateral side of an upper source/drain region of individual of the transistors within the row; a capacitor insulator over the first capacitor electrode; and a second capacitor electrode over the capacitor insulator. - View Dependent Claims (32, 33, 34, 35)
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Specification