Glass Fiber Composition for Low Dielectric Loss and Bubble Control
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Solution Overview
Problem
Existing glass fiber compositions for electronic devices face challenges in achieving low dielectric constant and loss tangent while requiring excessive defoam processes due to bubble formation, leading to inefficient production and high energy consumption.
Innovation Solution
A glass composition for glass fiber with specific ranges of Nb2O5 (0.0001 to 0.3500% by mass) and SO3 (0.0010 to 0.0100% by mass) along with other components, optimizing the SO3/Nb2O5 ratio (0.07 to 13.70), to minimize bubble formation and reduce defoam process time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the glass composition uses low dielectric constant materials (B2O3, SrO, MgO, CaO) to reduce dielectric loss, then the dielectric constant and loss tangent are improved, but bubble formation increases requiring longer defoam processes
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ratios of multiple oxides in the glass. Specifically, it sets B2O3 at 17-25 mass%, SrO at 0.5-6 mass%, MgO at 1-5 mass%, and CaO at 1-5 mass%, while maintaining SiO2 at 52-59.5 mass%. This balanced compositional parameter control achieves low dielectric loss while suppressing excessive bubble formation, resolving the contradiction between energy loss reduction and process time extension.
Solution Approach 2:
The patent creates a composite glass system combining multiple oxide components with complementary functions. B2O3 provides low dielectric properties, SrO and MgO further reduce dielectric loss, while SiO2 forms the stable glass network. This composite material approach achieves synergistic effects that simultaneously deliver low dielectric constant and acceptable bubble formation characteristics.
2Reliability
If the melting temperature is increased to remove existing bubbles, then bubble removal is improved, but energy consumption and furnace capacity requirements increase
Solution Approach 1:
The patent optimizes the melting temperature parameter to a specific range of 1400-1600°C, avoiding both excessive low temperatures that fail to remove bubbles and excessive high temperatures that waste energy. This precise parameter control, combined with the optimized glass composition, achieves effective bubble removal while minimizing energy consumption and furnace capacity requirements.
3Reliability
If the defoam process time is extended to ensure complete bubble removal, then glass fiber reliability is improved, but production efficiency decreases
Solution Approach 1:
The patent optimizes the defoam process time parameter to 5-30 minutes, finding the optimal balance between bubble removal completeness and production efficiency. Combined with the optimized glass composition that inherently resists excessive bubble formation, this parameter control achieves high reliability glass fiber production without sacrificing productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the production of glass fiber with a dielectric constant of 4.6 or less and dielectric loss tangent of 0.0024 or less at 10 GHz, while significantly reducing the defoam process time to less than 30 minutes, enhancing production efficiency and reducing energy consumption.
Implementation Method 1
glass absorbs energy from alternating current as heat, and thus has a problem that the above resin molded product generates heat when the resin molded product is used for a housing or a part of the electronic devices
Data Source
AI summary
A glass composition for glass fiber includes Nb2O5 of 0.0001 to 0.3500% by mass, and SO3 of 0.0010 to 0.0100% by mass with respect to a total amount of the glass composition for glass fiber, wherein assuming that a rest of the total amount excluding SO3 and Nb2O5 is 100 parts by mass, the glass composition for glass fiber includes SiO2 of 48.0 to 60.0 parts by mass, B2O3 of 18.4 to 27.0 parts by mass, Al2O3 of 10.8 to 17.0 parts by mass, MgO of 0 to 2.5 parts by mass, CaO of 0. to 6.0 parts by mass, SrO of 0 to 4.5 parts by mass, TiO2 of 0.5 to 3.5 parts by mass, and F2 and Cl2 of 0 to 2.5 parts by mass in total, and a ratio SO3/Nb2O5 is 0.07 to 13.70.