Synthesis of fluorinated hybrid material for UV embossing of a large core optical waveguide structure

Abstract

A new organic-inorganic hybrid material (HYBRIMER) has been synthesized homogeneously through a non-hydrolytic sol-gel process. The new HYBRIMER shows efficient index control and minor volume contraction behavior during micro-scale molding. In hybrid materials, the methacrylic end-group is considered suitable for cross-linking during the UV curing step, while the fluorinated functionality is appropriate for refractive index control. As the fluorinated silane contents are varied, the structural evolution and refractive index of the synthesized resin are then controlled (1.469 to 1.513 at 850 nm). A large core optical waveguide structure is formed by these hybrid materials, which exhibit low near IR wavelength absorption. A single material system is applied to both the core and the cladding materials of the optical waveguide. The measured optical propagation loss is lower than 0.25 dB cm 21 .

3D Microstructured Surfaces Obtained by Soft‐Lithography Using Fast‐Crosslinking Elastomeric Precursors and 2D Masters

“…In fact, pillar collapse was observed in pillars with aspect ratios > 5, in accordance with theoretical predictions. [31][32][33][34][35][36][37][38] Higher aspect ratios can be obtained by molding with harder materials, e.g., composite PDMS, [36,37,39] bilayer PDMS, [34,37,40] photocurable PDMS, [39,41] polyolefins, [42] PDMS with polymer-reinforced sidewalls, [43] fluoropolymers, [44][45][46] photocurable perfluoropolyethers, [47] photocurable fluorinated organic-inorganic hybrids [44,[48][49][50][51][52] or photocurable polyurethane acrylates. [53,54] Molding was also performed with elastomeric silicones used in the dental clinic for making denture impressions: Provil Novo, President and P2 (see Experimental part for details).…”

Study on the synthesis and application of silicone resin containing phenyl group

“…Hence, residual silanol groups may be present. Especially for prepolymers with organic group content, there might be a relatively smaller number of residual uncondensed silanol groups because of sterical hindrance around the organic group site [18]. The reduced [OH]/ [M] ratio indicated that the end-cap was nearly complete.…”

Micrometer and nanometer-scale parallel patterning of ceramic and organic–inorganic hybrid materials

“…38,96 It has been tried out as imprint resist, 99 but since the viscosity of the fluorinated prepolymer was rather high, it left a rather thick residual layer. The material is more interesting to be applied in nanopatterned moulds for imprinting other materials.…”