Composite woven fabric and printed wiring board

A composite woven fabric, comprising:

• quartz glass fibers including quartz glass fibers each having a relative dielectric constant of 3.9 or less at 1 MHz and a relative dielectric constant of 4.0 or less at 1 GHz and the quartz glass fibers each having a dielectric loss tangent of 1.5×10−4 or less at 1 MHz and a dielectric loss tangent of 2.0×10−4 or less at 1 GHz;
• and
• polyolefin fibers consisting of one of polyethylene fibers, polypropylene fibers, or polystyrene fibers, and wherein the polyolefin fibers each have a relative dielectric constant of 3.0 or less and a dielectric loss tangent of 3×10−3 or less at 1 MHz;
• wherein a ratio of the quartz glass fibers to the composite woven fabric is 10 vol. % or more and 90 vol. % or less,
• wherein the quartz glass fibers each have a filament diameter of 3 μm or more and 16 μm or less and the composite woven fabric has a thickness of 200 μm or less, and
• wherein the composite woven fabric is woven from combined filament yarns of the quartz glass fibers and the polyolefin fibers.

A composite woven fabric, comprising:

• quartz glass fibers including quartz glass fibers each having a relative dielectric constant of 3.9 or less at 1 MHz and a relative dielectric constant of 4.0 or less at 1 GHz and the quartz glass fibers each having a dielectric loss tangent of 1.5×10−4 or less at 1 MHz and a dielectric loss tangent of 2.0×10−4 or less at 1 GHz;
• and
• polyolefin fibers consisting of one of polyethylene fibers, polypropylene fibers, or polystyrene fibers, and wherein the polyolefin fibers each have a relative dielectric constant of 3.0 or less and a dielectric loss tangent of 3×10−3 or less at 1 MHz,
• wherein a ratio of the quartz glass fibers to the composite woven fabric is 10 vol. % or more and 90 vol. % or less,
• wherein the quartz glass fibers each have a filament diameter of 3 μm or more and 16 μm or less and the composite woven fabric has a thickness of 200 μm or less,
• wherein the composite woven fabric is woven from combined filament yarns of the quartz glass fibers and the polyolefin fibers, and
• wherein the composite woven fabric is used for a printed wiring board.

A printed wiring board produced by using the composite woven fabric comprising:

• quartz glass fibers including quartz glass each having a relative dielectric constant of 3.9 or less at 1 MHz and a relative dielectric constant of 4.0 or less at 1 GHz and the quartz glass fibers each having a dielectric loss tangent of 1.5×10−4 or less at 1 MHz and a dielectric loss tangent of 2.0×10−4 or less at 1 GHz;
• and
• polyolefin fibers consisting of one of polyethylene fibers, polypropylene fibers, or polystyrene fibers, and wherein the polyolefin fibers each have a relative dielectric constant of 3.0 or less and a dielectric loss tangent of 3×10−3 or less at 1 MHz,
• wherein a ratio of the quartz glass fibers to the composite woven fabric is 10 vol. % or more and 90 vol. % or less,
• wherein the quartz glass fibers each have a filament diameter of 3 μm or more and 16 μm or less and the composite woven fabric has a thickness of 200 μm or less,
• wherein the composite woven fabric is woven from combined filament yarns of the quartz glass fibers and the polyolefin fibers, and
• wherein the composite woven fabric is used for a printed wiring board.