Glass cloth, prepreg and printed wiring board
A technology of glass cloth and prepreg, which is applied to textiles, papermaking, textiles, fabrics, etc., can solve problems such as poor signal processing, and achieve the effect of small signal propagation speed difference and reduced offset
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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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