Laminate for printed circuit boards
AssigneeAlbemarle Corporation
InventorsNeil Brown, Michael Aggleton
Life of this patent
Estimating the term…
Abstract
Laminates for printed circuit boards having 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.
Claims11
A laminate for printed circuit boards having surface layers comprising curable resin impregnated woven glass fabric and intermediate layers comprising 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, and 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.
Dependencies are inferred from the claim text.