Acid-cleavable acetal and ketal based epoxy oligomers

Details Acid-cleavable acetal and ketal based epoxy oligomers Acid-cleavable acetal and ketal based epoxy oligomers

2005-07-19

2005-07-19

Sellers, Robert (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

C257S789000, C257S793000, C428S620000, C523S427000, C523S445000, C523S457000, C523S458000, C523S466000, C525S472000, C549S554000

Reexamination Certificate

active

06919420

ABSTRACT:
Reworkable thermoset acid-cleavable acetal and ketal based epoxy oligomers can be B-staged into a tack free state. Compositions containing the epoxy oligomers are employed in a reworkable assembly such as a wafer-level underfilled microelectronic package.

REFERENCES:
patent: 3682969 (1972-08-01), Batzer et al.
patent: 5512613 (1996-04-01), Afzali-Ardakani et al.
patent: 6258899 (2001-07-01), Buchwalter et al.
patent: 6617698 (2003-09-01), Buchwalter et al.

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