The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2003
Filed:
Nov. 24, 2000
Won Mok Kim, Seoul, KR;
Soon Gwang Kim, Koyang, KR;
Byung Ki Cheong, Seoul, KR;
Moon Kyo Chung, Seoul, KR;
Taek Sung Lee, Seoul, KR;
Korea Institute of Science & Technology, Seoul, KR;
Abstract
The present invention is related to a super-resolution composite material for a high density optical information recording medium which consists of a dielectric medium that is transparent at a laser wavelength in use and has a melting point higher than 800° C., and metal particles that are dispersed in the dielectric medium and have low melting points of 150˜450° C. Super-resolution capability of the material is rendered by metal particles that undergo reversible phase changes between melt and crystalline states, accompanied by changes in optical properties. As the dielectric medium, at least one material is selected for use from the group of SiO , TiO , ZrO , HfO , Al O , ZnO, Y O , BeO, MgO, WO , V O , SiN, AlN, ZnS, CdS SiC, MgF, CaF , NaF, BaF , PbF , LiF, LaF , GaP. As the metal particles with low melting points and high boiling points, at least one material is selected for use from a group of Sn, Pb, Bi, Te, Zn Cd, Se, Tl and Po.