Porous polymeric membrane toughened composites
AssigneeGore Enterprise Holdings, Inc.
InventorSamuel A. Thompson
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Abstract
Composites comprising porous polymeric membrane films meeting the following equation: 75 MPa<(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2, wherein at least a portion of the porosity of the membrane is imbibed with resin and methods for making the same. The composites have unusually high resistance to fracture and catastrophic failure.
Claims99
A composite comprising a porous polymeric membrane, wherein the porosity of the membrane is at least partially filled with resin, the resin having a room temperature flexural modulus of greater than about 1 GPa, and wherein the membrane satisfies the following equation:
- 75 MPa<(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2.
A composite comprising a porous polymeric membrane, wherein the porosity of the membrane is at least partially filled with resin and the membrane satisfies the following equation:
- 75 MPa<(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2, and wherein the ratio of the room temperature flexural modulus of the resin to the room temperature flexural modulus of the composite, measured in the direction of the higher of the transverse and longitudinal moduli, is greater than or equal to about 1.
A composite comprising a porous expanded polytetrafluoroethylene membrane, wherein the porosity of the membrane is at least partially filled with resin, the resin having a room temperature flexural modulus of greater than about 1 GPa, and wherein the membrane satisfies the following equation:
- 75 MPa<(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2.
An electronic chip package comprising a laminated substrate, wherein the laminated substrate includes at least one conductive layer and at least one dielectric layer bonded to the conductive layer, the dielectric layer comprising a porous, expanded polytetrafluoroethylene membrane wherein the porosity of the membrane is at least partially filled with resin, the resin has a room temperature flexural modulus of greater than about 1 GPa, and the membrane satisfies the following equation:
- 75 MPa<(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2.
Dependencies are inferred from the claim text.