Highly Reliable 256Mb NOR Flash MLC with Self-Aligned Process and Controlled Edge Profile

Кwon, Wook Hyun; Han, Jung In; Kim, Bomsoo; Baek, Chang‐Ki; Sim, Sung‐Han; Lee, Wook H.; Han, Jee Hoon; Jung, Cheol; Lee, Heon Kyu; Jang, Young Kwan; Park, Jeung Hwan; Kim, Dae Mann; Park, Chan-Kwang; Kim, Kinam

doi:10.7567/ssdm.2005.h-4-3

Cited by 2 publications

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“…In this study, in order to extract metallic components from used PCB, a high temperature melting process was adopted, and for this purpose a quaternary Xwt%SiO 2 -20wt%Al 2 O 3 -Ywt%CaO-10wt%MgO slag system was selected, which was determined based on a phase diagram using the results of quantitative analysis of oxidized electronic scrap [5]. Since SiO 2 and Al 2 O 3 were major components in the oxidized electronic scrap, which have an influence upon the slag fluidity by forming a silicate network chain, it was found that a relatively low temperature and a low viscosity slag could be obtained by the addition of basic fluxes such as CaO and MgO.…”

Section: Introductionmentioning

confidence: 99%

Effect of Slag Compositions on the Extraction of Metallic Components from the Used PCB

Jang

Han

Jeong

et al. 2006

MSF

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From materials view point, a PCB (Printed Circuit Board) is a simple mixture of various metals, plastics and oxides. Thus, it can be regarded as urbanized resources or ores. The existence of valuable metallic components in used PCB, then, becomes a major driving force for the recycling In this study, the effect of slag compositions on the extraction of valuable metallic components from the used PCB is investigated. Especially, a melting temperature of slag and slag viscosity are discussed as major operating parameters. PCB contains nearly 30wt% of SiO2 and 20wt% of Al2O3 as major oxides, and by just adding other flux components to used PCB, 20wt%Al2O3-Xwt%SiO2 - Ywt%CaO-10wt%MgO slag system with low melting point and low slag viscosity can be made to extract metallic components from used PCB by gravity separation. The slag basicity was changed under fixed compositions of Al2O3 and MgO. It was found that a proper melting temperature and slag basicity to make a homogeneous liquid slag and to extract metallic components from used PCB were 1573 K, and 0.75, respectively.

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Section: Introductionmentioning

confidence: 99%

Effect of Slag Compositions on the Extraction of Metallic Components from the Used PCB

Jang

Han

Jeong

et al. 2006

MSF

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“…Recently, the control of the edgeprofile of the tunnel oxide in 90-nm NOR Flash memory cells was shown to improve V T distribution [10], [11], indicating that the edge geometry also affects V T .…”

Section: Introductionmentioning

confidence: 99%

Edge Profile Effect of Tunnel Oxide on Erase Threshold-Voltage Distributions in Flash Memory Cells

Kim

Кwon²,

Baek³

et al. 2006

IEEE Trans. Electron Devices

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Highly Reliable 256Mb NOR Flash MLC with Self-Aligned Process and Controlled Edge Profile

Cited by 2 publications

References 0 publications

Effect of Slag Compositions on the Extraction of Metallic Components from the Used PCB

Effect of Slag Compositions on the Extraction of Metallic Components from the Used PCB

Edge Profile Effect of Tunnel Oxide on Erase Threshold-Voltage Distributions in Flash Memory Cells

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