Apparatus and methods including source gates
First Claim
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1. An apparatus comprising:
- a first string of charge storage devices associated with a pillar comprising semiconductor material;
a second string of charge storage devices associated with a pillar comprising semiconductor material;
a first source select device having a gate, the first source select device coupled to the first string of charge storage devices;
a second source select device having a gate, the second source select device coupled to the second string of charge storage devices, wherein the gates of the first and second source select devices are separated from one another;
a first source gate device having a gate, the first source gate device coupled between the first source select device and a source; and
a second source gate device having a gate, the second source gate device coupled between the second source select device and the source, wherein the gates of the first and second source gate devices are coupled to one another to be controlled in common.
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Abstract
Apparatus and methods are disclosed, such as an apparatus that includes a string of charge storage devices associated with a pillar (e.g., of semiconductor material), a source gate device, and a source select device coupled between the source gate device and the string. Additional apparatus and methods are described.
63 Citations
20 Claims
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1. An apparatus comprising:
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a first string of charge storage devices associated with a pillar comprising semiconductor material; a second string of charge storage devices associated with a pillar comprising semiconductor material; a first source select device having a gate, the first source select device coupled to the first string of charge storage devices; a second source select device having a gate, the second source select device coupled to the second string of charge storage devices, wherein the gates of the first and second source select devices are separated from one another; a first source gate device having a gate, the first source gate device coupled between the first source select device and a source; and a second source gate device having a gate, the second source gate device coupled between the second source select device and the source, wherein the gates of the first and second source gate devices are coupled to one another to be controlled in common. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus, comprising:
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multiple strings comprising charge storage devices; a first unit of source select devices respectively coupled to strings of a first group of strings of the multiple strings to control conduction between the strings of the first group and a source; a second unit of source select devices respectively coupled to strings of a second group of strings of the multiple strings to control conduction between the strings of the second group and the source, the first group of strings being different from the second group of strings; and a first unit of source gate devices, each respectively coupled in series with a source select device of the first and second units of source select devices, to control conduction between the strings of the first and second groups of strings and the source. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
a memory unit including; multiple strings of charge storage devices connected by a channel, strings arranged in multiple rows, each string associated with a pillar comprising semiconductor material; and each string in a row including, a source gate device coupled to a source and configured to control conduction between the channel of charge storage devices in the string and the source, wherein a gate of the source gate device is coupled to the gate of another source gate device in the same row of the multiple rows in the memory unit, and also to the gate of a source gate device in another row of the multiple rows in the memory unit; and a source select device coupled between the channel of charge storage devices and the source gate device, the source select device configured to control conduction between the channel and the source. - View Dependent Claims (19, 20)
Specification