Photosensitivity enhancement of PLZT ceramics by positive-ion implantation

Patent · Thu Jan 28 04:00:00 EST 1982

OSTI ID:6737826

Peercy, P. S.; Land, C. E.

The photosensitivity of lead lanthanum zirconate titanate (PLZT) ceramic material used in high resolution, high contrast, and nonvolatile photoferroelectric image storage and display devices is enhanced significantly by positive ion implantation of the PLZT near its surface. Implanted ions include H/sup +/, He/sup +/, Ne/sup +/, Ar/sup +/, as well as chemically reactive ions from Fe, Cr, and Al. The positive ion implantation advantageously serves to shift the absorption characteristics of the PLZT material from near-uv light to visible light. As a result, photosensitivity enhancement is such that the positive ion implanted PLZT plate is sensitive even to sunlight and conventional room lighting, such as fluorescent and incandescent light sources. The method disclosed includes exposing the PLZT plate to the positive ions at sufficient density, from 1 x 10/sup 12/ to 1 x 10/sup 17/, and with sufficient energy, from 100 to 500 keV, to provide photosensitivity enhancement. The PLZT material may have a lanthanum content ranging from 5 to 10%, a lead zirconate content of 62 to 70 mole %, and a lead titanate content of 38 to 30%. The ions are implanted at a depth of 0.1 to 2 microns below the surface of the PLZT plate.

• DOE Contract Number: AC04-76DP00789
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A343612
• Application Number: ON: DE83002379
• OSTI ID: 6737826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
ALUMINIUM IONS
ANTIFERROELECTRIC MATERIALS
ARGON IONS
CERAMICS
CHARGED PARTICLES
CHROMIUM IONS
DIELECTRIC MATERIALS
HELIUM IONS
HYDROGEN IONS
ION IMPLANTATION
IONS
IRON IONS
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
MATERIALS
MEMORY DEVICES
NEON IONS
OXYGEN COMPOUNDS
PHOTOSENSITIVITY
POLARIZATION
RARE EARTH COMPOUNDS
SENSITIVITY
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS