Circuit encapsulation process
First Claim
1. A method for encapsulating portions of a circuit formed on a substrate having two faces and perimeter sides, comprisinginserting the substrate into a mold,closing a top of the mold and a bottom of the mold against the substrate,pushing molding compound from a conduit having a top defined by the substrate into a chamber in the mold, andencapsulating, in the molding compound, a first portion of one of the faces of the substrate and a portion of the sides of the substrate, and, during encapsulation, leaving a second portion of the one face of the substrate unencapsulated, the second portion of the one face bearing conductive pads.
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Accused Products
Abstract
A method for encapsulating portions of a circuit formed on a substrate. The substrate has two faces and perimeter sides. Encapsulating surrounds, in molding compound, a portion of one of the faces of the substrate and a portion of the sides of the substrate, and during encapsulation a portion of the one face of the substrate that bears conductive pads is left unencapsulated.
An encapsulated circuit including a substrate having two faces and perimeter sides around the faces and a circuit formed on the substrate. The substrate also includes conductive pads that are formed on a portion of one of the faces near one of the sides and are connected to the circuit. An integrally formed encapsulating mass encapsulates all of the one face except in the region of the pads, all of the other face except in a region opposite to the region of the pads, and all of the sides.
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Citations
25 Claims
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1. A method for encapsulating portions of a circuit formed on a substrate having two faces and perimeter sides, comprising
inserting the substrate into a mold, closing a top of the mold and a bottom of the mold against the substrate, pushing molding compound from a conduit having a top defined by the substrate into a chamber in the mold, and encapsulating, in the molding compound, a first portion of one of the faces of the substrate and a portion of the sides of the substrate, and, during encapsulation, leaving a second portion of the one face of the substrate unencapsulated, the second portion of the one face bearing conductive pads.
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6. A method for encapsulating portions of a circuit formed on a substrate having two faces and perimeter sides, comprising
inserting the substrate into a mold, the substrate including an active portion on which the conductive pads and electronic components electrically connected to the conductive pads, are mounted, and a waste portion connected to the active portion by a segment in the area of the conductive pads, closing a top of the mold and a bottom of the mold against the waste portion and against the segment of the active portion in the area of the conductive pads, pushing molding compound from a conduit, having a top defined by the waste portion into a chamber in the mold, and encapsulating, in the molding compound, a first portion of one of the faces of the substrate and a portion of the sides of the substrate, and, during encapsulation, leaving a second portion of the one face of the substrate unencapsulated, the second portion of the one face bearing conductive pads.
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22. A method for encapsulating a circuit, comprising
inserting a substrate into a mold, wherein the substrate includes an active portion bearing electronic components and conductive pads for connecting to the components and a waste portion connected to the active portion by a segment in the area of the conductive pads, closing the mold causing a ridge on a top of the mold to extend down against the waste portion and the segment including the conductive pads and causing a first ridge on a bottom of the mold to press up against the waste portion and the segment including the conductive pads, pushing molding compound from a conduit having a top defined by the waste portion and an end defined by a second ridge on the bottom of the mold, into a mold cavity to encapsulate a portion of the active area, leaving the conductive pads exposed.
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23. A method for encapsulating circuits, comprising
inserting a substrate into a mold, wherein the substrate includes active portions bearing electronic components and conductive pads for connecting to the components and waste portions connected to the active portions by segments in the areas of the conductive pads, closing the mold causing ridges on a top of the mold to extend down against the waste portions and the segments including the conductive pads and causing first ridges on a bottom of the mold to press up against the waste portions and the segments including the conductive pads, pushing molding compound from conduits having tops defined by the waste portions and ends defined by second ridges on the bottom of the mold, into mold cavities to encapsulate portions of the active areas, leaving the conductive pads exposed.
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25. A method for encapsulating portions of a circuit formed on a substrate, comprising
inserting the substrate into a mold, the substrate including an active portion on which conductive pads and electronic components electrically connected to the conductive pads are mounted and a waste portion connected to the active portion by a segment in the vicinity of the conductive pads, closing a top of the mold and a bottom of the mold against the waste portion and against the segment of the active portion in the vicinity of the conductive pads, and pushing molding compound from a conduit, having a top defined by the waste portion, into a chamber in the mold.
Specification