Thermosetting resin compositions useful as underfill sealants
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United States of America Patent
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May 17, 2005
Grant Date -
Jul 17, 2003
app pub date -
Nov 15, 2002
filing date -
Nov 19, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a thermosetting resin composition useful as a highly filled low CTE underfilling sealant composition which completely fills the underfill space in a semiconductor device, such as a flip chip assembly which includes a semiconductor chip mounted on a carrier substrate, enables the semi-conductor to be securely connected to a circuit board by heat curing and with good productivity, and demonstrates acceptable heat shock properties (or thermal cycle properties). The thermosetting resin composition which is used as an underfilling sealant between such a semiconductor device and a circuit board to which the semiconductor device is electrically connected, includes an epoxy resin component, a latent hardener component, and a polysulfide-based toughening component. The latent hardener component includes a modified amide component and a latent catalyst therefor. Optionally, the inventive composition includes a filler, desirably at least a portion of the filler should have a particle size in the range of 1 to 1,000 nanometers.
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