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US 6,207,595 B1Granted
Laminate and method of manufacture thereof
AssigneeInternational Business Machines Corporation
InventorsBernd K. Appelt, Lawrence R. Blumberg, William T. Fotorny, Ross D. Havens, Robert M. Japp, Kostas Papathomas, Jan Obrzut, Mark D. Poliks, Amarjit S. Rai
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Abstract
A fabric material and method of its manufacture suitable for use in electronic packages including chip carriers. High insulation resistance is exhibited when subjected to high temperatures and humidity stress conditions.
Claims8
A fabric material having low moisture susceptibility, comprising:
- a cloth member having a predetermined maximum thickness and less than about 0.05 percent by weight of particulates as part thereof;
- and
- a hardened epoxy resin material having a glass transition temperature of greater than 145 degrees Celsius, substantially encasing said cloth member, including said particulates, said fabric material exhibiting an insulation resistance of greater than about 1,000,000 ohms after exposure to HAST testing.
A method of making fabric material exhibiting an insulation resistance of greater than about 1,000,000 ohms after exposure to HAST testing, comprising the steps of:
- providing a cloth member having a predetermined maximum thickness and less than about 0.05 percent by weight of particulates as part thereof;
- substantially encasing said cloth member, including said particulates with an epoxy resin material having a glass transition temperature of greater than 145 degrees Celsius;
- and
- at least partially hardening said resin material thereby making said fabric material exhibiting an insulation resistance of greater than about 1,000,000 ohms after exposure to HAST testing.
1 more element
Dependencies are inferred from the claim text.