Glass cloth, prepreg and printed wiring board

• Main Authors: Sugimura, Masaharu, Tachibana, Shinichiro, Kakizaki, Hirotaka
• Format: Patent
• Language: English
• Published: 10.11.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAUNDERING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LOOMS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; METHODS OF WEAVING; MINERAL OR SLAG WOOL; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRINTED CIRCUITS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; WEAVING; WORKING-UP; WOVEN FABRICS

A glass cloth comprising a glass yarn woven together, the glass yarn comprising multiple glass filaments, wherein an amount of B2O3 in a composition of the glass filaments is 15% by mass to 30% by mass, an amount of SiO2 in the composition thereof is 45% by mass to 60% by mass, and an amount of P2O5 in the composition thereof is 2% by mass to 8% by mass, and loss on ignition (LOI) of the glass cloth is 0.90% by mass to 2.0% by mass.