HIGH ELASTIC MODULUS COPPER-CLAD LAMINATE OF THERMOSETTING RESIN-IMPREGNATED GLASS FABRIC BASE MATERIAL AND DRILLING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a copper-clad laminate which has a high elastic modulus and is high in quality at through-holes and via holes by carbon dioxide laser drilling.

SOLUTION: In the high elastic modulus copper-clad laminate of a thermosetting resin-impregnated glass fabric base material for laser drilling and the method of drilling laminate holes of a diameter of≤0.15 mm are formed by lasers through a copper-clad laminate having at least one copper foil layer which is laminated on a prepreg obtained by impregnating a thermosetting resin in a glass fabric base material of a thickness of 25-150μm, the weight of 15-165 g/m2and an air permeability of 1-20 cm3/cm2/sec and drying the base material. The laminate allows the formation of through-holes and the via holes at a high speed. The obtained copper-clad laminate has holes with smooth walls and excellent reliability in connection between inner copper foil and front and back copper foil.

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