Invention Grant
- Patent Title: Integrated circuit devices and methods
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Application No.: US15634857Application Date: 2017-06-27
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Publication No.: US09966130B2Publication Date: 2018-05-08
- Inventor: Lawrence T. Clark , Scott E. Thompson , Richard S. Roy , Robert Rogenmoser , Damodar R. Thummalapally
- Applicant: Mie Fujitsu Semiconductor Limited
- Applicant Address: JP Kuwana
- Assignee: MIE Fujitsu Semiconductor Limited
- Current Assignee: MIE Fujitsu Semiconductor Limited
- Current Assignee Address: JP Kuwana
- Agency: Baker Botts L.L.P.
- Main IPC: G11C7/00
- IPC: G11C7/00 ; G11C11/418 ; G11C11/419 ; H01L27/11 ; H01L29/78 ; H01L29/10

Abstract:
An integrated circuit can include multiple SRAM cells, each including at least two pull-up transistors, at least two pull-down transistors, and at least two pass-gate transistors, each of the transistors having a gate; at least one of the pull-up transistors, the pull-down transistors, or the pass-gate transistors having a screening region a distance below the gate and separated from the gate by a semiconductor layer, the screening region having a concentration of screening region dopants, the concentration of screening region dopants being higher than a concentration of dopants in the semiconductor layer, the screening region providing an enhanced body coefficient for the pull-down transistors and the pass-gate transistors to increase the read static noise margin for the SRAM cell when a bias voltage is applied to the screening region; and a bias voltage network operable to apply one or more bias voltages to the multiple SRAM cells.
Public/Granted literature
- US20170301395A1 Integrated Circuit Devices and Methods Public/Granted day:2017-10-19
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