| 摘要 |
PROBLEM TO BE SOLVED: To obtain inexpensive glass cloth for printed circuit boards capable of providing circuit boards correspondable to low dielectric constant and high frequency property required for speeding-up of arithmetic processing and excellent in drill processing property by using a glass having low dielectric constant as glass different from characteristics which it originally has, capable of uniformly expressing newly obtainable characteristics by combining different kinds of glass yarns to make glass fiber uniform and especially being different kind. SOLUTION: In this glass cloth constituted of warp and weft, either one of warp and weft is E glass and the other is glass different from E glass and glass yarn composed of the glass is flattened and further, average space between adjacent glass yarn bundles is <=10% based on average yarn bundle width. It is especially preferable that weft comprises a glass different from E glass and the glass comprises D glass among glasses different from E glass.
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