Microelectronic device with capacitors having fine-grain dielect

Details Microelectronic device with capacitors having fine-grain dielect Microelectronic device with capacitors having fine-grain dielect

1994-12-07

1996-10-15

Ledynh, Bot L.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

365149, H01G 406, G11C 1124

Patent

active

055660460

ABSTRACT:
An improved dielectric material and microcircuit having capacitive elements which employ such a dielectric material are disclosed. The dielectric material comprises polycrystalline barium strontium titanate doped with at least one donor element and having a grain size of less than 1 micron. In the preferred embodiments, the donor element may be Nb, Ta, Bi, Sb, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er or a combination thereof. The material may be further doped with an acceptor dopant to control resistivity. The microcircuit comprises capacitors having such a dielectric material and connected to a semiconductor substrate which contains embedded circuitry for reading the voltage across a capacitor.

REFERENCES:
patent: 4677083 (1987-06-01), Uedaira et al.
patent: 4740700 (1988-04-01), Shaham et al.
patent: 4983839 (1991-01-01), Deb
patent: 5130542 (1992-07-01), Sibbald et al.
R. W. Whatmore, et al., "Ferroelectric Materials for Thermal IR Sensors State-of-the-Art and Perspectives", Ferroelectrics, 1990, vol. 104, pp. 269-283.
B. M. Kulwicki, "Instabilities in PTC Resistors", Proceedings of 6th IEEE International Symposium on Applications of Ferroelectrics, Bethlehem, PA., Jun. 8-11, 1986, pp. 656-664.
B. M. Kulwicki, "Trends in PTC Resistor Technology", SAMPE Journal, Nov./Dec., 1987, vol. 23-6, pp. 34-38.
Toshio Ashida et al., "The Effects of Additives and of Ambient-Atmosphere During Heating on the Electrical Resistivity of Semiconducting BaTiO," Japanese Journal of Applied Physics, vol. 5, No. 1, Apr. 1996, pp. 269-274.
E. D. Mochlen, "Materials and Fundamental Properties of Switching PTC Thermistors", Thermistors Electrochemical Publications Ltd., Ayr, Scotland, 1979, pp. 154-17-.
R. W. Whatmore, "Pyroelectric-Ceramics and Devices for Thermal Infrared Detection and Imaging", Ferroelectrics, 1991, vol. 118, pp. 241-259.
T. Murakami, et al. "Dy-Doped BaTiO.sub.3 Ceramics for High Voltage Capacitor Use", Ceramic Bulletin, vol. 55, No. 6(1976), pp.-572-575.
B. M. Kulwicki, "TTC Materials Technology, 1955-1980", Advances in Ceramics, vol. 1, Grain Boundary Phenomena in Electronic Ceramics, 1981, pp. 138-154.
L. A. Xue et al., "The Influence of Ionic Radii on the Incorporation of Trivalent Dopants into BaTio.sub.3 " Material Science Engineering, B1 (1988), pp. 193-201.

Affiliated with

Also associated with

Rating

Microelectronic device with capacitors having fine-grain dielect does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microelectronic device with capacitors having fine-grain dielect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microelectronic device with capacitors having fine-grain dielect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1251615