Patent ID: 7049253

Claim:
A glass cloth composed of a group of warp yarns and a group of weft yarns, wherein a diameter of a single fiber of the warp and weft yarns has a thickness of nominal diameter D or less as defined by JIS-R-3413, and wherein one of the group groups of the warp and weft yarns is arranged with substantially no gap between the yarns, and in that group, a width A (μm) of a cross-section of a yarn in that group, a single-fiber diameter L (μm) of a yarn in that group, the number N of single-fibers constituting a yarn in that group and a weaving density C (ends/25 mm) of the glass cloth satisfy the following equation (1-a): C×A /(25× L×N )≧1.0 (1-a).