Invention Grant
- Patent Title: Circuit and methods to improve the operation of SOI devices
- Patent Title (中): 电路和方法来改善SOI器件的运行
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Application No.: US12181007Application Date: 2008-07-28
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Publication No.: US08093657B2Publication Date: 2012-01-10
- Inventor: Roy Childs Flaker , Louis C. Hsu , Jente Kuang
- Applicant: Roy Childs Flaker , Catherine O'Brien, legal representative , Scott Flaker, legal representative , Shirley A. Flaker, legal representative , Bruce Flaker, legal representative , Anne Flaker, legal representative , Heather Flaker, legal representative , Louis C. Hsu , Jente Kuang
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Connolly Bove Lodge & Hutz LLP
- Agent Joseph P. Abate
- Main IPC: H01L27/13
- IPC: H01L27/13

Abstract:
According to the present invention, a circuit and methods for enhancing the operation of SOI fabricated devices are disclosed. In a preferred embodiment of the present invention, a pulse discharge circuit is provided. Here, a circuit is designed to provide a pulse that will discharge the accumulated electrical charge on the body of the SOI devices in the memory subarray just prior to the first access cycle. As explained above, once the accumulated charge has been dissipated, the speed penalty for successive accesses to the memory subarray is eliminated or greatly reduced. With a proper control signal, timing and sizing, this can be a very effective method to solve the problem associated with the SOI loading effect. Alternatively, instead of connecting the bodies of all SOI devices in a memory circuit to ground, the bodies of the N-channel FET pull-down devices of the local word line drivers can be selectively connected to a reference ground. This would enable the circuit to retain most of the speed advantages associated with SOI devices while overcoming the loading problem described above. With this preferred embodiment of the present invention, the major delay caused by the bipolar loading effect is minimized while the speed advantage due to providing a lower, variable Vt effect is preserved. The overall body resistance of the individual devices has a minimal effect on the device body potential.
Public/Granted literature
- US20090273988A1 CIRCUIT AND METHODS TO IMPROVE THE OPERATION OF SOI DEVICES Public/Granted day:2009-11-05
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