A new inorganic-organic polymer for the passivation of thin film capacitors

Abstract

Inorganic-organic polymers with barrier properties against water vapor , excellent electrical data and good adhesion to various substrate materials have been developed. Tailored modifications of these materials provide an excellent protective coating for thin film capacitors. Several mm thick , expensive , encapsulations could be replaced by thin coatings. The polymer coating allows the use of thin film chip capacitors in surface-mount technology. As a measure for the efficiency of the coating , the capacitance decrease under controlled humidity has been used. The influence of the material composition , the type of catalyst during sol-gel processing and the curing conditions have been studied. Adhesion and water vapor permeation properties of the polymers and rheological properties of the coating solutions have been investigated. A protective coating is developed , which increases the withstandnesss of capacitors against humid conditions by a factor of about 30 (compared to uncoated capacitors) and shows no crack formation during thermal cycling

Spectroscopic characterization of GPTMS/DETA and GPTMS/EDA hybrid polymers

“…Inorganic-organic hybrids are interesting materials for their potential wide range of applications, particularly in composites and coatings [1][2][3][4][5][6][7] as they can provide the processability, flexibility, toughness and durability of organic polymers with the abrasion resistance, hardness, chemical resistance, weatherability and UV-resistance of inorganic silicate polymers. The inorganic and organic networks are formed, often simultaneously, to achieve homogeneous phase morphologies.…”

Crystallization in hybrid organic-inorganic materials through self-organization from 3-glycidoxypropyltrimethoxysilane

“…If GPTMS is dissolved in an aqueous solution of NaOH to reach a pH > 13, the conditions that we have previously described are fulfilled; the sol can be used for deposition of films or for preparing bulk gels upon controlled aging. 44) A good description of the reactions that happen in the sol is obtained by 13 C NMR; Fig. 3 shows the 13 C NMR spectra of GPTMS in a highly basic solution as a function of the aging time.…”

“…44) A good description of the reactions that happen in the sol is obtained by 13 C NMR; Fig. 3 shows the 13 C NMR spectra of GPTMS in a highly basic solution as a function of the aging time. The signals of epoxy decrease in intensity with aging time, while at the same time the rise of new signals due to diols, terminal methyl ether groups, polyethylene oxide and dioxane are observed.…”

Hybrid Inorganic-Organic Polymers Based on Organically Modified Si-Alkoxides

“…The lifetime of a Al/PET-foil capacitor could be extended up to 60 days in a harsh climate of 90 C and 100 % humidity compared to 5 days with conventional encapsulation. [74] The dielectric and optical properties (see Table 3) of ORMOCERs lead to applications as patterned dielectric and optical layers. [75±78] Various patterning techniques are available and have been tested successfully (photolithography of photosensitive ORMOCERs with negative resist behavior, laser ablation at 248 nm and laser direct writing at 257 and 360 nm, embossing, etc.).…”