Protectively coated phosphors

Guillermo R. Villalobos; Shyam S. Bayya; Jasbinder Singh Sanghera; Ishwar D. Aggarwal

doi:10.1117/12.344634

12 April 1999 Protectively coated phosphors

Guillermo R. Villalobos, Shyam S. Bayya, Jasbinder Singh Sanghera, Ishwar D. Aggarwal

Proceedings Volume 3636, Flat Panel Display Technology and Display Metrology; (1999) https://doi.org/10.1117/12.344634
Event: Electronic Imaging '99, 1999, San Jose, CA, United States

Abstract

We have developed a spraying process for coating individual phosphor particles with electrically conducting, non- conducting, and hybrid films. The phosphor is suspended in either aqueous or non-aqueous solvent containing the appropriate coating materials precursors. Depositions via gelation or precipitation of the precursor material on the particles is prevented before spraying. The suspension is sprayed into a hot zone where the coating either gels or precipitates on the particle surface in-flight. Coatings developed in-flight are more uniform than coatings developed in solution. Typical coating thicknesses of 10 to 90 nm have been achieved in a single pass. Multiple coatings are applied using multiple passes. This process is scalable to industrial sizes and is easily adaptable for coating particles for other applications.

Citation Download Citation

Guillermo R. Villalobos, Shyam S. Bayya, Jasbinder Singh Sanghera, and Ishwar D. Aggarwal "Protectively coated phosphors", Proc. SPIE 3636, Flat Panel Display Technology and Display Metrology, (12 April 1999); https://doi.org/10.1117/12.344634

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