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    • 6. 发明申请
    • PRINTED WIRING BOARD
    • 印刷线路板
    • US20140158406A1
    • 2014-06-12
    • US14232595
    • 2012-07-19
    • Hiroaki KatoKiyotaka Komori
    • Hiroaki KatoKiyotaka Komori
    • H05K1/03
    • H05K1/03H01P3/026H01P3/082H01P3/085H05K1/024H05K1/036H05K2201/029
    • An object of the present invention is to provide a printed wiring board which does not require arranging signal lines oblique to the warp or weft threads constituting a substrate and is capable of reducing a difference in transmission rates between the signal lines. The present invention relates to a printed wiring board including: an insulating layer; and a signal layer including a set of at least two signal lines and disposed on one side of the insulating layer. A substrate is embedded inside the insulating layer in such a manner to be further from the signal layer than a center of the insulating layer in a thickness direction of the insulating layer is. The insulating layer has a laminated structure of a thick layer, the substrate, and a thin layer. A ratio of a thickness of the thick layer to a thickness of the thin layer is greater than five.
    • 本发明的目的是提供一种印刷线路板,其不需要将信号线布置成构成基板的经线或纬线倾斜,并且能够减小信号线之间的传输速率的差异。 印刷电路板技术领域本发明涉及一种印刷电路板,包括:绝缘层; 以及包括一组至少两条信号线并设置在绝缘层的一侧上的信号层。 在绝缘层的内部,绝缘层的厚度方向的绝缘层的绝缘层的中心以外的信号层被埋设在绝缘层的内部。 绝缘层具有厚层,基板和薄层的叠层结构。 厚层的厚度与薄层的厚度之比大于5。
    • 10. 发明授权
    • Glass fiber forming composition, glass fibers obtained from the
composition and substrate for circuit board including the glass fibers
as reinforcing material
    • 玻璃纤维形成组合物,由组合物获得的玻璃纤维和用于电路板的基板,包括玻璃纤维作为增强材料
    • US5407872A
    • 1995-04-18
    • US148539
    • 1993-11-08
    • Kiyotaka KomoriSeishiro YamakawaShigeru YamamotoJun NakaTadashi Kokubo
    • Kiyotaka KomoriSeishiro YamakawaShigeru YamamotoJun NakaTadashi Kokubo
    • C03C13/00H05K1/03G03C13/02
    • C03C3/097C03C13/00C03C3/091C03C3/102H05K1/0326H05K1/0366H05K1/0373H05K2201/0116H05K2201/0209
    • A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub..GAMMA. as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5 ; and 0.5 to 15 mol % of AlO.sub.3/2 as calculated from an incorporated amount of Al.sub.2 O.sub.3. The composition is also characterized to incorporate at least 85 mol % of a total amount of the oxides and have a dielectric constant [.epsilon..sub..GAMMA. ] of 9 or more at 1 MHz and 25.degree. C.
    • 玻璃纤维形成组合物显示出非常高的介电常数εGAMMA以及优异的耐化学性,但易于纺成玻璃纤维。 该组合物的特征在于显示出低于玻璃组合物的粘度为102.5泊的纺丝温度的失透温度,以便容易地纺丝成相应的玻璃纤维。 该组合物基本上由40至65mol%的SiO 2组成; 20〜45摩尔%的选自MgO,CaO,SrO和BaO的至少一种成分; 5〜25摩尔%的选自TiO 2和ZrO 2的至少一种成分; 和0.5〜15mol%的NbO 5/2,由Nb 2 O 5的掺入量计算。 或者,组合物基本上由40至65mol%的SiO 2组成; 20〜45摩尔%的选自CaO,SrO和BaO的至少一种成分; 5〜25摩尔%的选自TiO 2和ZrO 2的至少一种成分; 由Nb 2 O 5的掺入量计算的NbO 5/2为0.5〜15摩尔% 和由Al 2 O 3的掺入量计算的0.5〜15摩尔%的AlO 3/2。 该组合物的特征还在于,在1MHz和25℃下,所含的氧化物总量至少为85mol%,其介电常数εε为9或更大。