Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Reexamination Certificate
2006-06-20
2006-06-20
Bos, Steven (Department: 1754)
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
C428S328000, C428S329000, C156S307400, C442S060000, C442S065000, C442S070000, C442S172000, C442S175000, C442S180000
Reexamination Certificate
active
07063883
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.
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Aggleton Michael
Brown Neil
Albemarle Corporation
Bos Steven
Kliebert Jeremy J.
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