Ceramic and method of manufacturing the same, dielectric capacitor, semiconductor device, and element

Abstract

A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.

1 . A ceramic which is a complex oxide having an oxygen octahedral structure, comprising Si and Sn in the oxygen octahedral structure,
 wherein the complex oxide is at least one of a perovskite, bismuth-layer structured_oxide, superconducting oxide, and tungsten bronze structured oxide, and   Si and Sn are included in a B site of the oxygen octahedral structure.   
     
     
         2 . The ceramic according to  claim 1 , wherein the molar ratio of Sn to Si is 0<Sn/Si<9. 
     
     
         3 . The ceramic according to  claim 1 , wherein Si and Sn have a coordination number of six. 
     
     
         4 . A semiconductor device comprising a capacitor including a film of the ceramic according to  claim 1 . 
     
     
         5 . A semiconductor device comprising a film of the ceramic according to  claim 1  as a gate insulating film. 
     
     
         6 . An element comprising the ceramic according to  claim 1 . 
     
     
         7 . The ceramic according to  claim 1 ,
 wherein the complex oxide having the oxygen octahedral structure is at least one of a perovskite and bismuth-layer structured oxide shown by ABO 3  or (Bi 2 O 2 ) 2+ (A m−1 B m O 3m+1 ) 2−  (wherein A represents at least one element selected from the group consisting of Li, Na, K, Rb, Pb, Ca, Sr, Ba, Bi, La, and Hf, B represents at least one element selected from the group consisting of Ru, Fe, Ti, Zr, Nb, Ta, V, W, and Mo, and m is a natural number of 5 or less),   a superconducting oxide material shown by LanBa 2 Cu 3 O 7 , Trm 2 Ba 2 Ca n−1 Cu n O 2n+4 , or TrmBa 2 Ca n−1 Cu n O 2n+3  (wherein Lan represents at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, Trm represents at least one element selected from the group consisting of Bi, Ti, and Hg, and m is a natural number from 1 to 5), and   a tungsten bronze structured oxide shown by A 0.5 BO 3  (tetragonal bronze structure) or A 0.3 BO 3  (hexagonal bronze structure) (wherein A represents at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Pb, Ca, Sr, Ba, Bi, and La, and B represents at least one element selected from the group consisting of Ru, Fe, Ti, Zr, Nb, Ta, V, W, and Mo).   
     
     
         8 . The ceramic according to  claim 1 ,
 wherein the complex oxide having the oxygen octahedral structure is at least one of (Bi,La) 4 (Ti,Si,Sn) 3 O 12 , (Bi 2 O 2 ) 2+ (CaBi 4 (Ti,Si,Sn) 4 O 15 ) 2− , Sr 2 (Ta,Nb,Si,Sn) 2 O 7 , (Bi 2 Sr 2 Ca 2 (Cu,Si,Sn) 3 O X  and (Sr,Ba)(Ti,Si,Sn)O 3 .