Glass cloth, prepreg, and printed wiring board
A glass cloth, prepreg technology, used in fabrics, textiles, textiles and papermaking, etc., can solve problems such as poor signal processing
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Embodiment 1
[0233] The warp uses an average filament diameter of 4.0μm, the number of filaments is 50, the number of twists is 1.0Z, and the mass per unit length is 1.46×10 -6 kg / m L glass filaments, average filament diameter 4.5μm, 50 filaments, twist number 1.0Z, mass per unit length 1.83×10 -6 The filaments of L glass in kg / m were woven into a glass cloth with a weaving density of 93.5 warps / 25 mm and 70 wefts / 25 mm using an air-jet loom. It should be noted that the L glass (composition: SiO 2 : 51%, Al 2 o 3 : 13%, CaO: 8%, B 2 o 3 : 23%) with a density of 2.30g / cm 3 . The glass cloth of the obtained gray cloth was heat-processed at 400 degreeC for 24 hours, and desizing was performed. Next, immerse in a treatment solution using N-β-(N-vinylbenzylaminoethyl)-γ-aminopropyltrimethoxysilane as a silane coupling agent: SZ6032 (manufactured by Dow Corning Toray Co., Ltd.) Glass cloth, after squeezed, dried at 120°C for 1 minute, and then fiber-opened by high-pressure water spray to...
Embodiment 2
[0239] Make the weaving density of weft yarn be 75 / 25mm, utilize the method identical with embodiment 1 to carry out the weaving of glass cloth and the processing thereafter, obtain quality 11.1g / m 2 , Glass cloth B with a thickness of 14 μm. The widths of the warp and weft of glass cloth B are 138 μm and 276 μm respectively, the occupancy of the weft is 83%, the elongation in the warp direction is 0.19%, and the elongation in the weft direction is 0.25%. The ratio of the section height in the weft direction to the section height in the weft direction is 1.00. The weft amount of the glass cloth B was 1 mm, and it was a glass cloth excellent in handleability.
[0240] The evaluation substrate B was produced in the same manner as in Example 1, and it was evaluated that the offset between the copper foil wire and the weft satisfies a distance within 0.5 times the interval of the weft, which was 202 mm.
Embodiment 3
[0242] Make the weaving density of weft yarn be 78 / 25mm, utilize the method identical with embodiment 1 to carry out the weaving of glass cloth and the processing thereafter, obtain quality 11.2g / m 2 , Glass cloth C with a thickness of 14 μm. The widths of the warp and weft of glass cloth C are 138 μm and 277 μm respectively, the occupancy of the weft is 86%, the elongation in the warp direction is 0.19%, and the elongation in the weft direction is 0.23%. The ratio of the section height in the weft direction to the section height in the weft direction is 1.03. The amount of weft of the glass cloth C was 0.5 mm, and it was a glass cloth excellent in handleability.
[0243] The evaluation substrate C was produced in the same manner as in Example 1, and it was evaluated that the offset between the copper foil wire and the weft satisfies a distance within 0.5 times the interval of the weft, which was 415 mm.
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Abstract
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