TY - JOUR
KW - Annealing
KW - Platinum
KW - Hydrogen
KW - Electrodes
KW - Titanium dioxide
KW - Lanthanum compounds
KW - Doping (additives)
KW - Ferroelectric devices
KW - Lead compounds
KW - Capacitors
KW - Lead zirconate titanate (PZT)
KW - Leakage currents
KW - Niobium
KW - Passivation
KW - Inter-layer dielectrics (ILD)
KW - Lanthanum strontium cobalt oxide
AU - J .T Jr
AU - L.L Boyer
AU - G Velasquez
AU - Ramamoorthy Ramesh
AU - S Aggarwal
AU - V Keramidas
AB - Ferroelectric capacitors, being oxide ceramics, are very sensitive to the effects of hydrogen environments at elevated temperatures [H. Ashida et al.: Integr. Ferroelectr. 21 (1998) 97]. After a capacitor has been exposed directly to a annealing hydrogen environment at low hydrogen partial pressures, the electrical properties of the device can deteriorate and leakage currents can increase. At higher hydrogen concentration gradients, such as the formidable forming gas annealing, physical failure of the inter-layer dielectric (ILD) and/or top electrode adhesion can occur. The authors have examined various structural approaches to mitigate the effects of hydrogen damage on integrated ferroelectric lead zirconate titanate (PZT) capacitors. These approaches, including the use of a titanium dioxide barrier layer above the PZT to impede the reducing effect of hydrogen on the ceramic and the use of electrode layers other than platinum to eliminate the generation of free hydrogen ions by catalyst action [S. Aggarwal et al.: Appl. Phys. Lett. 73 (1998) 1973]. The authors have found that niobium-doped PZT capacitors using LSCO/platinum electrodes passivated with titanium dioxide will recover from 1% forming gas annealing within 30 minutes at 450°C in nitrogen. © 1999 Publication Board, Japanese Journal of Applied Physics.
BT - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
LA - eng
M1 - 9 B
N1 - cited By 13
N2 - Ferroelectric capacitors, being oxide ceramics, are very sensitive to the effects of hydrogen environments at elevated temperatures [H. Ashida et al.: Integr. Ferroelectr. 21 (1998) 97]. After a capacitor has been exposed directly to a annealing hydrogen environment at low hydrogen partial pressures, the electrical properties of the device can deteriorate and leakage currents can increase. At higher hydrogen concentration gradients, such as the formidable forming gas annealing, physical failure of the inter-layer dielectric (ILD) and/or top electrode adhesion can occur. The authors have examined various structural approaches to mitigate the effects of hydrogen damage on integrated ferroelectric lead zirconate titanate (PZT) capacitors. These approaches, including the use of a titanium dioxide barrier layer above the PZT to impede the reducing effect of hydrogen on the ceramic and the use of electrode layers other than platinum to eliminate the generation of free hydrogen ions by catalyst action [S. Aggarwal et al.: Appl. Phys. Lett. 73 (1998) 1973]. The authors have found that niobium-doped PZT capacitors using LSCO/platinum electrodes passivated with titanium dioxide will recover from 1% forming gas annealing within 30 minutes at 450°C in nitrogen. © 1999 Publication Board, Japanese Journal of Applied Physics.
PY - 1999
SP - 5361
EP - 5363
T2 - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
TI - Effect of hydrogen anneals on niobium-doped lead zirconate titanate capacitors with lanthanum strontium cobalt oxide/platinum electrodes
VL - 38
SN - 00214922
ER -