The fabrication and electrical properties of modulated stacked capacitor for advanced DRAM applications

A capacitor structure, called the modulated stacked (MOST) capacitor, has been developed to increase the DRAM cell capacitance using surface modulation technology. The hemispherical-shaped polysilicon deposited on top of a thick polysilicon storage electrode is used as a mask to selectively form a d...

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Veröffentlicht in:IEEE electron device letters 1992-08, Vol.13 (8), p.430-432
Hauptverfasser: Jun, Y.K., Rha, S.K., Kim, S.C., Roh, J.S., Kim, W.S., Lee, H.-G.
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container_end_page 432
container_issue 8
container_start_page 430
container_title IEEE electron device letters
container_volume 13
creator Jun, Y.K.
Rha, S.K.
Kim, S.C.
Roh, J.S.
Kim, W.S.
Lee, H.-G.
description A capacitor structure, called the modulated stacked (MOST) capacitor, has been developed to increase the DRAM cell capacitance using surface modulation technology. The hemispherical-shaped polysilicon deposited on top of a thick polysilicon storage electrode is used as a mask to selectively form a deep groove in the electrode, hence significantly increasing the surface area. With this structure, the surface area of the storage electrode can be increased by as much as 8 times that of an ordinary stacked capacitor (STC) which takes the same chip area. Experimental results show that electrical properties such as leakage current, breakdown voltage, and TDDB are comparable to those of a conventional stacked capacitor.< >
doi_str_mv 10.1109/55.192781
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identifier ISSN: 0741-3106
ispartof IEEE electron device letters, 1992-08, Vol.13 (8), p.430-432
issn 0741-3106
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language eng
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source IEEE Electronic Library (IEL)
subjects Applied sciences
Capacitance
Capacitors
Circuits
Dielectric films
Electrodes
Electronics
Etching
Exact sciences and technology
Fabrication
Integrated circuits
Integrated circuits by function (including memories and processors)
Leakage current
Random access memory
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Surface morphology
title The fabrication and electrical properties of modulated stacked capacitor for advanced DRAM applications
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