Invention Grant
- Patent Title: Multi-wafer 3D CAM cell
- Patent Title (中): 多晶圆3D CAM单元
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Application No.: US13364607Application Date: 2012-02-02
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Publication No.: US08576599B2Publication Date: 2013-11-05
- Inventor: Jagreet S. Atwal , Joseph S. Barnes , Kerry Bernstein , Robert J. Bucki , Jason A. Cox
- Applicant: Jagreet S. Atwal , Joseph S. Barnes , Kerry Bernstein , Robert J. Bucki , Jason A. Cox
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Agent Vazken Alexanian
- Main IPC: G11C15/00
- IPC: G11C15/00 ; G11C5/14

Abstract:
A multi-wafer CAM cell in which the negative effects of increased travel distance have been substantially reduced is provided. The multi-wafer CAM cell is achieved in the present invention by utilizing three-dimensional integration in which multiple active circuit layers are vertically stack and vertically aligned interconnects are employed to connect a device from one of the stacked layers to another device in another stack layer. By vertically stacking multiple active circuit layers with vertically aligned interconnects, each compare port of the inventive CAM cell can be implemented on a separate layer above or below the primary data storage cell. This allows the multi-wafer CAM structure to be implemented within the same area footprint as a standard Random Access Memory (RAM) cell, minimizing data access and match compare delays.
Public/Granted literature
- US20120127771A1 MULTI-WAFER 3D CAM CELL Public/Granted day:2012-05-24
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