Method for preparing laminates
AssigneeAlbemarle Corporation
InventorsNeil Brown, Michael Aggleton
Life of this patent
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Abstract
Method for the preparation of a laminate for printed circuit boards by composing together surface layers of curable resin impregnated woven glass fabric and intermediate layers of curable resin impregnated non-woven glass. The intermediate layers contain 200 percent by weight to 275 percent by weight, based on the resin in the intermediate layers, of a thermally stable aluminum hydroxide of the molecular formula Al2O3.nH2O, wherein n has a value of 2.6<n<2.9. The aluminum hydroxide has a specific surface area, measured by the BET method, of 2 to 10 m2/g and a particle size in the D50% range of 5 to 10 μm.
Claims18
Laminate for printed circuit boards having surface layers comprising resin impregnated woven glass fabric and intermediate layers comprising curable resin impregnated non-wove glass, characterized in that the intermediate layer contains 200% by weight to 275% by weight based on the resin in the intermediate layer of aluminium hydroxide of the molecular formula Al2O3.nH2O wherein n has a value of >2 6 to <2 9
Method for the preparation of a laminate for printed circuit boards by composing together surface layers comprising curable resin impregnated woven glass fabric and intermediate layers comprising curable resin-impregnated non-woven glass, characterized in that the curable resin-impregnated non-woven glass contains 200% by weight to 275% by weight based on the resin in the intermediate layers of a thermally stable aluminium hydroxide of the molecular formula Al2O3nH2O, wherein n has a value of <2 6 to <2 9
Thermally stable aluminium hydroxide of the molecular formula Al2O3nH2O, wherein n has a value of >2 6 to <2 9
Dependencies are inferred from the claim text.