Invention Grant
- Patent Title: Complementary bipolar SRAM
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Application No.: US14793561Application Date: 2015-07-07
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Publication No.: US09653149B2Publication Date: 2017-05-16
- Inventor: Tak H. Ning
- Applicant: International Business Machines Corporation
- 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 Louis J. Percello, Esq.
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C11/416 ; G11C11/411 ; H01L27/11 ; H01L27/102

Abstract:
A complementary lateral bipolar SRAM device and method of operating. The device includes: a first set and second set of lateral bipolar transistors forming a respective first inverter device and second inverter device, the first and second inverter devices being cross-coupled for storing a logic state. In each said first and second set, a first bipolar transistor is an PNP type bipolar transistor, and a second bipolar transistor is an NPN type bipolar transistor, each said NPN type bipolar transistor having a base terminal, a first emitter terminal, a second emitter terminal, and a collector terminal. Emitter terminals of the PNP type transistors of each first and second inverter devices are electrically coupled together and receive a first applied wordline voltage. The first emitter terminals of each said NPN transistors of said first inverter and second inverter devices are electrically coupled together and receive a second applied voltage. The second emitter terminal of one NPN bipolar transistor of said first inverter is electrically coupled to a first bit line conductor, and the second emitter terminal of the NPN bipolar transistor of said second inverter device is electrically coupled to a second bit line.
Public/Granted literature
- US20160343427A1 COMPLEMENTARY BIPOLAR SRAM Public/Granted day:2016-11-24
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