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US 5,311,462 AGranted
Physical placement of content addressable memories
AssigneeIntel Corporation
InventorSteven Wells
Life of this patent
Estimating the term…
Abstract
A method is described for locating content addressable memory (CAM) bit cells on a column within a main memory array and within the guard ring surrounding the main memory array.
Claims7
A content addressable memory (CAM) bit associated with a flash memory array having a guard ring, the CAM bit comprising:
- a flash memory cell located on a column fabricated as part of the flash memory array and within the guard ring.
A nonvolatile semiconductor memory comprising:
- a) a main memory array having a multiplicity of memory cells;
- b) a guard ring enclosing the main memory array;
- c) a redundant memory cell for replacing a defective memory cell within the main memory array;
- and
- d) a content addressable memory for activating the redundant memory cell, the content addressable memory including a CAM memory cell located on a column of the main memory array and within the guard ring, wherein a vertical pitch of the CAM cell relative to the main memory array is within a range of 6-8.
2 more elements
Dependencies are inferred from the claim text.