Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Opposed registering coacting female molds
Reexamination Certificate
2007-09-04
2007-09-04
Davis, Robert B. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Opposed registering coacting female molds
C257S666000, C425S129100
Reexamination Certificate
active
09974958
ABSTRACT:
An integrated circuit leadframe has a pair of leadframe rails that are specially treated to adhere to injection mold compounds to a lesser or greater degree than portions of the leadframe rails outside of the treated areas. By adhering to mold compounds to a greater degree, mold compound not removed during a deflashing procedure does not flake off to form mold compound debris during a trimming and forming procedure. By adhering to mold compounds to a lesser degree, substantially all of the mold compound is removed during the deflashing procedure so there is no mold compound to flake off to form mold compound debris during the trimming and forming procedure. The leadframe rails may be treated by forming apertures in the rails, by increasing or decreasing the roughness of the leadframe rails, or by coating the leadframe rails with an adhesion promoting or reducing material.
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Gifford Michael D.
Williams Vernon M.
Davis Robert B.
Dorsey & Whitney LLP
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