Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Reexamination Certificate
2005-06-21
2005-06-21
Thornton, Yvette C. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
C430S270160, C430S281100, C430S198000, C430S322000, C430S325000, C430S328000, C528S010000, C522S148000, C427S162000
Reexamination Certificate
active
06908723
ABSTRACT:
A photo-patternable perfluorinated silane sol-gel material is presented that exhibits a high refractive index and propagation losses below 1 dB/cm at the telecommunication wavelengths. The sol-gels are produced with general formula [img id="CUSTOM-CHARACTER-00001" he="3.13mm" wi="2.79mm" file="US06908723-20050621-P00900.TIF" alt="custom character" img-content="character" img-format="tif" ?(CH2)n,R′—Si(O)2]x—[Si(O)4]y—[R′—Si(O)3]z—[R″(CH2)n—M(O)3]w—[R′″(CH2)n—Si(O)3]vwhere O is oxygen, Si is silicon, M is a metal alkoxyde known to form bonds with organic compounds through oxygen donor ligands, and whereimg id="CUSTOM-CHARACTER-00002" he="3.13mm" wi="2.79mm" file="US06908723-20050621-P00900.TIF" alt="custom character" img-content="character" img-format="tif" ?, R″ and R′″ are photo cross-linkable groups, and where (CH2)nare alkyl spacers with n being an integer ≧0. The sol-gels can be fabricated to produce complex waveguide structures directly onto silica-on-silicon substrates with low bending losses.
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R. Buestrich et al., ORMOCER's for Optical Interconnection Technology, Journal of Sol-Gel Science and Technology 20, 2001, pp. 181-186, Kluwer Academic Publishers, The Netherlands.
Fardad Amir
Liang Wei
Zhang Yadong
Gifford Eric A.
NP Photonics Inc.
Thornton Yvette C.
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