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US 6,855,738 B2Granted
Nanoporous laminates
AssigneeDow Global Technologies LLC
InventorsLudovic L. Valette, Catherine Marestin, Regis Mercier
Life of this patent
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Abstract
A process of making a nanoporous substrate, such as the matrix in an electrical laminate, by grafting onto an organic resin backbone a thermolabile functionality by reacting hydrogen active groups of the organic resin with a compound containing thermolabile groups; then thermally degrading the thermolabile groups grafted on the organic resin to form a nanoporous laminate. Advantageously, the nanoporous electrical laminate has a low dielectric constant (Dk) because of the nanopores present in the laminate matrix.
Claims21
A process for making a nanoporous substrate comprising the steps of:
- (a) grafting onto a backbone of an organic resin, a thermolabile functionality by reacting hydrogen active groups of the organic resin with a compound containing thermolabile group;
- (b) preparing a composition by blending the organic resin containing thermolabile groups with at least a curing agent;
- and
- (c) thermally degrading the thermolabile groups grafted on the organic resin such as to produce a nanoporous substrate.
1 more element
Dependencies are inferred from the claim text.