Appeal No. 2002-1205
Application No. 09/422,380
1. A ferroelectric material, comprising:
(a) A material composition of substituted PbTiO3 with Ca substituted for Pb and Sn
substituted for Ti as shown within the dashed-line region of Figure 4.
2. A ferroelectric material, comprising:
(a) (Pb1-xCax)(Ti1-ySny)O3 with 0.15 < x + y < 0.4 and 0.1 < y/x < 4.
3. A ferroelectric material, comprising:
(a) a material of (Pb1-xCax)TiO3 with x in the range of about 0 to 0.1; and
(b) a dopant of 1 % or less and selected from the group consisting of Dy, Ho, Bi, Ce, Fe, and
mixtures thereof.
4. A method of fabrication of ferroelectric material, comprising the steps of:
(a) reacting metal organic compounds of lead, titanium, calcium, and tin in a solution to
form a (Pb1-xCax)(Ti1-ySny)O3 compound;
(b) rapid thermal annealing the compound of step (a) with a thermal budget of less than about
600 °C for 20 seconds, 575 °C for 45 seconds, 550 °C for 90 seconds, or 525 °C for 200 seconds.
5. The method of claim 4, further comprising the step of:
(a) adding a dopant of 1 % or less and selected from the group consisting of Dy, Ho, Bi, Fe,
and mixtures thereof to the solution of step (a) of claim 4.
6. The material of claim 1, further comprising:
(a) a dopant of 5 mol% or less and selected from the group consisting of Mn, Dy, Bi, Y, Ho, Ce,
Gd, Ga, Cd, Fe, and mixtures thereof.
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