Flash memory device and layout method of the flash memory device
First Claim
1. A flash memory device comprising:
- a plurality of high voltage transistors operatively associated with a page buffer circuit, wherein each high voltage transistor comprises;
a gate pattern separating a first pattern from a second pattern, wherein the first and second patterns extend in parallel and serve as respective source/drain regions, and the first pattern is floated and the second pattern receives an erase voltage during an erase operation, andwherein a first set of high voltage transistors is series connected in a columnar arrangement, such that column adjacent high voltage transistors are laid out with alternating source/drain symmetry in the columnar direction.
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Accused Products
Abstract
Provided is a flash memory device including a plurality of page buffer high voltage transistors. The plurality of high voltage transistors are operatively associated with a page buffer circuit, wherein each high voltage transistor includes; a gate pattern separating a first pattern from a second pattern. The first and second patterns extend in parallel and serve as respective source/drain regions, and the first pattern is floated and the second pattern receives an erase voltage during an erase operation. A first set of high voltage transistors is series connected in a columnar arrangement, such that column adjacent high voltage transistors are laid out with alternating source/drain symmetry in the columnar direction.
9 Citations
12 Claims
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1. A flash memory device comprising:
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a plurality of high voltage transistors operatively associated with a page buffer circuit, wherein each high voltage transistor comprises;
a gate pattern separating a first pattern from a second pattern, wherein the first and second patterns extend in parallel and serve as respective source/drain regions, and the first pattern is floated and the second pattern receives an erase voltage during an erase operation, andwherein a first set of high voltage transistors is series connected in a columnar arrangement, such that column adjacent high voltage transistors are laid out with alternating source/drain symmetry in the columnar direction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A layout method for a flash memory device, the method comprising:
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defining a plurality of high voltage transistors operatively associated with a page buffer circuit, wherein each high voltage transistor comprises;
a gate pattern separating a first pattern from a second pattern, wherein the first and second patterns extend in parallel and serve as respective source/drain regions;defining a series connected first set of high voltage transistors in a columnar arrangement, such that column adjacent high voltage transistors are laid out with alternating source/drain symmetry in the columnar direction; and defining voltage line connections to the first set of high voltage transistors, such that during an erase operation each respective first pattern is floated and each respective second pattern receives an erase voltage. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification