| Perfluorostyrene compound, and coating solution and optical waveguide device using the same -> Monitor Keywords |
|
|
 
Perfluorostyrene compound, and coating solution and optical waveguide device using the sameRelated Patent Categories: Synthetic Resins Or Natural Rubbers -- Part Of The Class 520 Series, Involving Inert Gas, Steam, Nitrogen Gas, Or Carbon Dioxide, Processes Of Preparing A Desired Or Intentional Composition Of At Least One Nonreactant Material And At Least One Solid Polymer Or Specified Intermediate Condensation Product, Or Product Thereof, Adding A Nrm To A Preformed Solid Polymer Or Preformed Specified Intermediate Condensation Product, Composition Thereof; Or Process Of Treating Or Composition Thereof, Polymer Derived From Ethylenic Reactants Only, From Fluorine-containing MonomerPerfluorostyrene compound, and coating solution and optical waveguide device using the same description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070173592, Perfluorostyrene compound, and coating solution and optical waveguide device using the same. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates, in general, to perfluorostyrene compounds, and coating solutions and optical waveguide devices using the same. In particular, the present invention is directed to a fluorine compound having perfluorostyrene moiety, and a coating solution and an optical waveguide device using the same. These fluorinated compounds are applied for a core and a cladding material of various planar optical waveguide devices, such as optical switches, variable optical attenuators (VOA), tunable and fixed wavelength filters, arrayed waveguide grating (AWG) devices, etc. [0003] 2. Description of the Related Art [0004] Generally, polymeric optical waveguide devices should be required the reliability based on Telcodia test for the optical communication network. In such a case, the polymer material should have very high thermal stability and environmental stability. Further, there are required accurate control of a refractive index and low birefringence as well as low optical propagation loss at a telecommunication wavelength region. Furthermore, in order to fabricate a desirable optical device, the polymer material should have excellent adhesion to any substrate. Of the above-mentioned requirements, the optical propagation loss and the birefringence are regarded as very important characteristics. The optical propagation loss on a polymer thin film is mainly caused by the light absorption by a harmonic overtone vibration mode of a C--H bond in the presence of polymer. Such light absorption at wavelengths of near far infrared can be decreased by substituting deuterium (D) or halogen elements, such as fluorine (F), for hydrogen of C--H bond (or O--H, N--H), whereby an absorption wavelength band can be shifted to 5-25 .mu.m. Therefore, the loss can be lowered at communication wavelengths. [0005] On the other hand, the birefringence of the thin film is caused by a molecular structure and a stress of a thin film-preparing process. [0006] Accordingly, various polymer materials have been developed to meet all the requirements. In this regard, a fluorinated polyimide compound, which is known to have excellent heat resistance, even at about 400.degree. C., has been continuously applied for optical waveguide devices (U.S. Pat. No. 5,598,501, Macromolecules, vol 27, pp 6665, 1994 and Electronics Letters, 29(3) 269, 1993). However, polyimide suffers from drawbacks, such as relatively high optical loss of 0.7 dB/cm or more and a high birefringence of 0.008 or more. [0007] As another polymer material, there is proposed UV-curable fluorinated acrylate including various compositions, which is advantageous in terms of relatively low optical loss of 0.3 dB/cm at 1.55 .mu.m and a birefringence of 0.0008. (U.S. Pat. No. 6,306,563 B1, and IEEE Journal of selected topics in quantum electronics vol. 6, pp 54, 2000). [0008] As still another polymer material, there is proposed fluorinated polyarylene ether having a low dielectric constant, and excellent mechanical strength and processability (U.S. Pat. No. 5,115,082), which shows the possibility as a potential optical polymer. In addition, the above polymer system is added with a thermally curable reactive group, to drastically increase chemical resistance, whereby such a polymer is applied for the optical waveguide device (Korean Patent No. 226,442). Consequently, fluorinated polyarylene ether based polymers have been further improved in optical loss (0.4 dB/cm) and birefringence (0.004), compared to polyamide-based polymers, but is disadvantageous of still high birefringence and high processing temperatures (280.degree. C. or more). SUMMARY OF THE INVENTION [0009] To avoid the problems encountered in the related art, perfluorostyrene is introduced at a terminal of a compound for use in an optical device, whereby inherent light absorption caused by a higher order harmonic vibration mode of a C--H bond in the compound can be prevented in optical communication wavelength, thus realizing low optical loss, low optical birefringence, precise control of a refractive index, and a fabrication of optical devices at low temperatures in a short process time. [0010] Therefore, it is the object of the present invention to provide a fluorinated compound having perfluorostyrene introduced at a terminal thereof. [0011] Another object of the present invention is to provide a coating solution using the fluorinated compound. [0012] Still another object of the present invention is to provide an optical waveguide device using the fluorinated compound. BRIEF DESCRIPTION OF THE DRAWINGS [0013] The above and other objects, features and other advantages of the present invention will be better understood from the following detailed description taken in conjunction with the accompanying drawings, in which: [0014] FIG. 1 shows the refractive index according to blending ratio of fluorinated compounds of the present invention; and [0015] FIG. 2 shows the precise control of refractive index according to blending ratio of coating solutions of the present invention. DETAILED DESCRIPTION OF THE INVENTION [0016] Based on the present invention, a fluorinated compound having perfluorostyrene introduced at a terminal thereof is synthesized through a reaction of polyol and pentafluorostyrene, which is represented by the following Formula 1: [0017] Wherein Z is ) or S; R.sub.F is an aliphatic or aromatic group; y is a natural number of 1-10; y' is an integer of 0-1; x is an integer of 0-200; and [0018] Wherein B is a single bond or selected from the group consisting of --CO--, --SO.sub.2--, --S-- and --O--; and Hal is selected from the group consisting of F, Cl, Br and I. [0019] Preferably, the fluorinated polymer compound having perfluorostyrene introduced at a terminal thereof is represented by the following Formula 2 in which y and y' are 1: [0020] Wherein Z is O or S, preferably O, and preferred R.sub.F is --CH.sub.2(CF.sub.2).sub.nCH.sub.2--, --CH.sub.2CF.sub.2O(CF.sub.2CF.sub.2O).sub.nCF.sub.2CH.sub.2--, or Continue reading about Perfluorostyrene compound, and coating solution and optical waveguide device using the same... Full patent description for Perfluorostyrene compound, and coating solution and optical waveguide device using the same Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Perfluorostyrene compound, and coating solution and optical waveguide device using the same patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Perfluorostyrene compound, and coating solution and optical waveguide device using the same or other areas of interest. ### Previous Patent Application: Thermoplastic elastomer composition, formed article and sealing material having low hardness Next Patent Application: Dimer diol (meth)acrylates uses as a matting agent Industry Class: Synthetic resins or natural rubbers -- part of the class 520 series ### FreshPatents.com Support Thank you for viewing the Perfluorostyrene compound, and coating solution and optical waveguide device using the same patent info. IP-related news and info Results in 0.10108 seconds Other interesting Feshpatents.com categories: Novartis , Pfizer , Philips , Polaroid , Procter & Gamble , 174 |
 * Protect your Inventions * US Patent Office filing 
PATENT INFO |
|
