Glass cloth, prepreg, and printed wiring board
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsAmane Hirose, Yuka Hashimoto
Life of this patent
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Abstract
The present disclosure relates to a glass cloth, prepreg, and printed circuit board. There is provided a glass cloth including woven glass yarns each containing a plurality of filaments, wherein a bulk dissipation factor of a glass in the glass yarns is 0.0010 or less, a tensile strength of warp yarns per thickness of the glass cloth as represented by the following formula (A) is in the range of 0.50 to 6.0: warp direction tensile strength (N/25 mm) of the glass cloth/thickness of the glass cloth (μm) (A), a coefficient of variation of the warp direction tensile strength of the glass cloth is in the range of 15% or less, and a dissipation factor of the glass cloth at 10 GHz is in the range of greater than 0 and 0.0010 or less.
Claims20
A glass cloth, comprising woven glass yarns each containing a plurality of filaments, wherein
- a bulk dissipation factor of a glass in the glass yarns is 0.0010 or less,
- a tensile strength of warp yarns per thickness of the glass cloth as represented by the following formula (A) is in the range of 0.50 to 6.0:
- warp
-
- direction
-
- tensile
-
- strength
-
- (
- N
- /
- 25
-
- mm
- )
-
- of
-
- the
-
- glass
-
-
- cloth
- /
- thickness
-
- (
- µm
- )
-
- of
-
- the
-
- glass
-
- cloth
- ,
- (
- A
- )
- a coefficient of variation of the warp direction tensile strength of the glass cloth is in the range of 15% or less, and
- a dissipation factor of the glass cloth at 10 GHz is in the range of greater than 0 and 0.0010 or less.
A glass cloth, comprising woven glass yarns each containing a plurality of filaments, wherein
- a bulk dissipation factor of a glass in the glass yarns is 0.0010 or less,
- a tensile strength of warp yarns per thickness of the glass cloth as represented by the following formula (A) is in the range of 0.50 to 6.0:
- warp
-
- direction
-
- tensile
-
- strength
-
- (
- N
- /
- 25
-
- mm
- )
-
- of
-
- the
-
- glass
-
-
- cloth
- /
- thickness
-
- (
- µm
- )
-
- of
-
- the
-
- glass
-
- cloth
- ,
- (
- A
- )
- a coefficient of variation of a filament diameter of glass fibers constituting the glass cloth is in the range of 10% or less, and
- a dissipation factor of the glass cloth at 10 GHz is in the range of greater than 0 and 0.0010 or less.
Dependencies are inferred from the claim text.