Semiconductor package with pre-fabricated cover and method of fabrication
First Claim
Patent Images
1. A method for assembling a semiconductor package comprising:
- providing a substrate comprising a plurality of external contacts;
mounting a semiconductor die to the substrate in electrical communication with the external contacts;
providing a cover configured for attachment to the substrate to enclose the die;
applying a seal material to the cover or to the substrate; and
placing the cover on the substrate, with the cover enclosing the die, and with the seal material attaching the cover to the substrate, and forming a seal between the cover and the substrate.
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0 Petitions
Accused Products
Abstract
A semiconductor package includes a substrate having one or more dice mounted thereto, and a cover adapted to protect and form a sealed space for the dice. The cover can be pre-fabricated of molded plastic, or stamped metal, and attached to the substrate using a cured seal. A hole can also be provided through the substrate to permit pressure equalization during formation of the seal. The cover can be prefabricated in an enclosed configuration for attachment directly to the substrate, or in a planar configuration for attachment to a peripheral ridge on the substrate. In either embodiment, the cover is removable to permit defective dice to be replaced or repaired.
174 Citations
23 Claims
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1. A method for assembling a semiconductor package comprising:
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providing a substrate comprising a plurality of external contacts; mounting a semiconductor die to the substrate in electrical communication with the external contacts; providing a cover configured for attachment to the substrate to enclose the die; applying a seal material to the cover or to the substrate; and placing the cover on the substrate, with the cover enclosing the die, and with the seal material attaching the cover to the substrate, and forming a seal between the cover and the substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for assembling a semiconductor package comprising:
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providing a substrate having a hole therethrough; mounting a plurality of semiconductor dice to the substrate proximate to the hole; providing a cover configured for attachment to the substrate to enclose the dice in a space; applying seal material to the cover or to the substrate, the seal material comprising a curable material; placing the cover on the substrate and over the dice; curing the seal material to form a seal between the cover and substrate, to seal the space, and to attach the cover to the substrate; and permitting gas to exit or enter through the hole during the placing and curing steps. - View Dependent Claims (8, 9, 10)
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11. A method for assembling a semiconductor package comprising:
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providing a substrate comprising a plurality of semiconductor dice; providing a cover configured for attachment to the substrate to enclose the dice; applying a first quantity of adhesive material to the cover or to the substrate; tacking the cover to the substrate using the first quantity of adhesive material; following the tacking step, testing the dice; and following the testing step, applying a second quantity of adhesive material between the cover and the substrate to form a seal therebetween. - View Dependent Claims (12, 13)
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14. A method for assembling a semiconductor package comprising:
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providing a substrate comprising a plurality of external contacts; mounting a semiconductor die to the substrate in electrical communication with the external contacts; applying an adhesive material to the substrate in a configuration that forms a ridge on the substrate surrounding the die; providing a cover configured for attachment to the ridge to enclose the die and form a space; placing the cover on the ridge; and curing the adhesive material to attach the cover to the ridge and seal the space. - View Dependent Claims (15, 16, 17, 18)
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19. A method for assembling a semiconductor package comprising:
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providing a substrate; forming a ridge on the substrate having a peripheral outline and comprising a curable adhesive material; mounting a semiconductor die to the substrate within the peripheral outline of the ridge; providing a cover configured for attachment to the ridge; placing the cover on the ridge; and curing the adhesive material to attach the cover to the substrate and form a seal. - View Dependent Claims (20, 21, 22, 23)
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Specification