Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1996-11-14
1998-09-15
Cameron, Erma
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427344, 427378, 427380, 4273977, 427384, 437195, 437978, B05D 512, H01L 2100
Patent
active
058076077
ABSTRACT:
This invention has enabled a new, simple nanoporous dielectric fabrication method. In general, this invention uses a polyol, such as glycerol, as a solvent. This new method allows both bulk and thin film aerogels to be made without supercritical drying, freeze drying, or a surface modification step before drying. Prior art aerogels have required at least one of these steps to prevent substantial pore collapse during drying. Thus, this invention allows production of nanoporous dielectrics at room temperature and atmospheric pressure, without a separate surface modification step. Although not required to prevent substantial densification, this new method does not exclude the use of supercritical drying or surface modification steps prior to drying. In general, this new method is compatible with most prior art aerogel techniques. Although this new method allows fabrication of aerogels without substantial pore collapse during drying, there may be some permanent shrinkage during aging and/or drying.
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Ackerman William C.
Smith Douglas M.
Stoltz Richard A.
Cameron Erma
Denker David
Donaldson Richard L.
Kesterson James C.
Texas Instruments Incorporated
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