PREPREG AND METAL FOIL CLAD LAMINATED PLATE

摘要

PROBLEM TO BE SOLVED: To provide a prepreg free from a halogen and having good solder heat resistance characteristic and free from unevenness in appearance, and also provide a laminated plate. SOLUTION: The prepreg is produced by a process comprising immersing into or applying to a substrate a composition in which aluminium hydroxide (A) and aluminum hydroxide (B) having water of crystallization partially reduced by heating and weight decreasing rate of 22-32% by TGA are included in a thermosetting resin (D) as an essential component. A laminated plate for a print wiring material or a metal foil clad laminated plate is obtained by curing the prepreg.