Direct wafer bonding and layer transfer-a new approach to integration of ferroelectric oxides into silicon technology
Metal-ferroelectric-silicon (MFS) structures were fabricated by a layer transfer process and direct wafer bonding (DWB) and by direct deposition of ferroelectric films onto Si. Detailed transmission electron microscope (TEM) investigations revealed that a direct wafer bonding and layer transfer proc...
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Published in: | Ferroelectrics Vol. 231; no. 1; pp. 169 - 178 |
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Main Authors: | , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Taylor & Francis Group
01-06-1999
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Abstract | Metal-ferroelectric-silicon (MFS) structures were fabricated by a layer transfer process and direct wafer bonding (DWB) and by direct deposition of ferroelectric films onto Si. Detailed transmission electron microscope (TEM) investigations revealed that a direct wafer bonding and layer transfer process yields good quality ferroelectric/Si interfaces. C-V characteristics and interface trap measurements show a large difference for Au-ferroelectric-Si structures fabricated by bonding or by direct deposition. For directly deposited interfaces the trap densities are ranging from 2×10
12
cm
−2
eV
−1
for SBT/Si to 2×10
13
cm
−2
eV
−1
for PZT/Si. For bonded interfaces, irrespective of the top ferroelectric layer, the trap density is about 4×10
11
cm
−2
eV
−1
. |
---|---|
AbstractList | Metal-ferroelectric-silicon (MFS) structures were fabricated by a layer transfer process and direct wafer bonding (DWB) and by direct deposition of ferroelectric films onto Si. Detailed transmission electron microscope (TEM) investigations revealed that a direct wafer bonding and layer transfer process yields good quality ferroelectric/Si interfaces. C-V characteristics and interface trap measurements show a large difference for Au-ferroelectric-Si structures fabricated by bonding or by direct deposition. For directly deposited interfaces the trap densities are ranging from 2 x 10 super(12) cm super(-2)eV super(-1) for SBT/Si to 2 x 10 super(13) cm super(-2)eV super(-1) for PZT/Si. For bonded interfaces, irrespective of the top ferroelectric layer, the trap density is about 4 x 10 super(11) cm super(-2)eV super(-1). Metal-ferroelectric-silicon (MFS) structures were fabricated by a layer transfer process and direct wafer bonding (DWB) and by direct deposition of ferroelectric films onto Si. Detailed transmission electron microscope (TEM) investigations revealed that a direct wafer bonding and layer transfer process yields good quality ferroelectric/Si interfaces. C-V characteristics and interface trap measurements show a large difference for Au-ferroelectric-Si structures fabricated by bonding or by direct deposition. For directly deposited interfaces the trap densities are ranging from 2×10 12 cm −2 eV −1 for SBT/Si to 2×10 13 cm −2 eV −1 for PZT/Si. For bonded interfaces, irrespective of the top ferroelectric layer, the trap density is about 4×10 11 cm −2 eV −1 . |
Author | Alexe, M. Gösele, U. Senz, St Pignolet, A. Hesse, D. |
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Cites_doi | 10.1143/JJAP.37.1107 10.1016/S0167-9317(97)00023-3 10.1080/10584589808202089 10.1080/00150197608236584 10.1116/1.587505 10.1063/1.121337 10.1143/JJAP.27.L2364 10.1063/1.368279 10.1557/PROC-493-517 10.1080/10584589808012697 10.1016/S0169-4332(97)80118-3 10.1063/1.119189 10.1080/10584589908228469 10.1016/S0254-0584(98)00090-X 10.1103/PhysRevLett.81.3014 |
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Title | Direct wafer bonding and layer transfer-a new approach to integration of ferroelectric oxides into silicon technology |
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