Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2007-12-25
2007-12-25
San Martin, J. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C257S347000, C252S06290R, C252S06290R, C501S134000
Reexamination Certificate
active
11097924
ABSTRACT:
In a piezoelectric element, a cubic or tetragonal orientation control layer (15) is provided on a first electrode layer (14), and formed on the orientation control layer (15) is a piezoelectric layer (16) having a rhombohedral or tetragonal crystalline structure and made of lead zirconate titanate to which a Pb-containing complex perovskite compound expressed by the chemical formula Pb(AaBb)O3has been added in an amount that is from 1 mol % to 50 mol %. The piezoelectric layer (16) is formed so that the crystal grains thereof become columnar grains which extend in the thickness direction of the piezoelectric layer (16) and in which the ratio of the average cross-sectional diameter to the length is from 1/50 to 1/14.
REFERENCES:
patent: 2003/0098632 (2003-05-01), Takeuchi et al.
patent: 2004/0206296 (2004-10-01), Lee et al.
patent: 2004/0256948 (2004-12-01), Solberg
patent: 2005/0127795 (2005-06-01), Torii et al.
patent: 2005/0146772 (2005-07-01), Murata et al.
patent: 06116095 (1994-04-01), None
patent: 10-081016 (1998-03-01), None
patent: 10-209517 (1998-08-01), None
patent: 11-191646 (1999-07-01), None
patent: 3021930 (2000-01-01), None
patent: 2000-252544 (2000-09-01), None
patent: 2001-088294 (2001-04-01), None
Ryoichi Takayama et al.; “Preparation of epitaxial Pb(ZrxTi1-x)O3thin fims and their crystallographic, pyroelectric, and ferroelectric properties”; Journal of Applied Physics, vol. 65, No. 4; pp. 1666-1670; Feb. 1989.
Kouji Sumi et al.; “Structure and Piezoelectric Properties of 0.9Pb(Zr,Ti)O3-0.1Pb(Mg, Nb) O3Films Prepared by Metalorganic Deposition Process”; Japanese Journal of Applied Physics; vol. 38, No. 2A, pp. 886-889; Feb. 1999.
P Muralt et al.; “Texture control of PbTiO3and Pb(Zr, Ti)O3thin films with TiO2seeding”; Journal of Applied Physics vol. 83, No. 7; pp. 3835-3841; Apr. 1998.
Fujii Eiji
Fujii Satoru
Kamada Takeshi
Tomozawa Atsushi
Harness & Dickey & Pierce P.L.C.
Martin J. San
LandOfFree
Piezoelectric element, ink jet head, angular velocity... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piezoelectric element, ink jet head, angular velocity..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric element, ink jet head, angular velocity... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3852629