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US 5,477,008 AGranted
Polymer plug for electronic packages
AssigneeOlin Corporation
InventorsAnthony M. Pasqualoni, Deepak Mahulikar, Francis S. Jewell, Paul R. Hoffman, George Brathwaite, Richard McNabb, German Ramirez
Life of this patent
Estimating the term…
Abstract
There are provided polymer plugs for sealing the vent hole of an adhesively sealed electronic package. The polymer vent hole plug is selected to be either an ultraviolet curable polymer or a thermosetting polymer resin. One effective vent hole plug is a cylindrical plug having a diameter under 1.4 millimeters formed from a UV-curable epoxy.
Claims10
An adhesively sealed electronic package, comprising:
- a base component;
- a cover component, the combination of said base component and said cover component defining a cavity;
- a leadframe disposed between said base component and said cover component and adhesively bonded to both;
- and
- a polymer vent hole plug selected from the group consisting of ultraviolet curable polymers having a room temperature viscosity before curing of from about 500 centipoise to about 10,000 centipoise and thermosetting epoxy resins having a room temperature viscosity before curing of from about 5,000 centipoise to about 3000 poise and a cure time of under 3 minutes, said polymer vent hole plug having a diameter of less than about 1.4 millimeters and extending through at least one of either said base component or said cover component.
2 more elements
An adhesively sealed electronic package, comprising:
- a base component;
- a cover component, the combination of said base component and said cover component defining a cavity;
- a leadframe disposed between said base component and said cover component and adhesively bonded to both;
- and
- a composite polymer vent hole plug extending through at least one of either said base component or said cover component and having a smaller diameter interior portion formed from a UV-curable adhesive within said component and a larger diameter exterior portion formed from a thermosetting epoxy also within said component.
2 more elements
Dependencies are inferred from the claim text.