Photosensitivity enhancement of PLZT ceramics by positive ion implantation

Patent · Tue Jul 05 04:00:00 EDT 1983

OSTI ID:5369257

Land, C E; Peercy, P S

The photosensitivity of lead lanthanum zirconate titanate (PLZT) ceramic material used in high resolution, high contrast, and non-volatile 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.

• Assignee: Dept. of Energy
• Patent Number(s): US 4391901
• OSTI ID: 5369257
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
ARGON
DISPLAY DEVICES
ELEMENTS
FLUIDS
GASES
HELIUM
HYDROGEN
IMAGE STORAGE TUBES
IMAGE TUBES
ION IMPLANTATION
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
NEON
NONMETALS
OXYGEN COMPOUNDS
PHOTOSENSITIVITY
PLZT
RARE EARTH COMPOUNDS
RARE GASES
SENSITIVITY
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS