HETEROGENEOUS ENCAPSULATION
First Claim
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1. An electronic device comprising:
- a substrate having first and second non-overlapping regions;
at least first electronic component attached to the first region of the substrate, wherein the first electronic component is sealed with a first encapsulant; and
a second encapsulant formed over the second region of the substrate, the second encapsulant having mechanical, electrical and/or chemical properties different from mechanical, electrical and/or chemical properties of the first encapsulant.
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Abstract
An improved method for producing a PCB assembly requiring at least two different encapsulants is disclosed. The PCB assembly may have two or more separate regions in which electronic devices are attached. In each region, a unique encapsulant with different mechanical, electrical, physical and or chemical properties is used according to the particular requirements of the electronic devices in that region.
12 Citations
25 Claims
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1. An electronic device comprising:
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a substrate having first and second non-overlapping regions; at least first electronic component attached to the first region of the substrate, wherein the first electronic component is sealed with a first encapsulant; and a second encapsulant formed over the second region of the substrate, the second encapsulant having mechanical, electrical and/or chemical properties different from mechanical, electrical and/or chemical properties of the first encapsulant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic device comprising:
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a printed circuit board; a first plurality of bonding pads formed on the printed circuit board; a first plurality of electronic components attached to a first region of the printed circuit; a first encapsulant covering the first region of the printed circuit board including the first plurality of electronic components; an electronic connector having a housing and a plurality of leads the extend from the housing attached to the first plurality of bonding pads, wherein an exterior surface of the housing of the electronic connector is spaced apart from a second region of the printed circuit board different than the first region; a second encapsulant extending between the exterior surface of the housing to the second region of the printed circuit board and covering the plurality of leads attached to the first plurality of bonding pads, wherein the second encapsulant is more compliant than the first encapsulant. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An adapter for providing a communication path between first and second electronic devices, the adapter comprising:
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a printed circuit board having non-overlapping first, second and third regions; a first plurality bonding pads formed in the second region of the printed circuit board; a second plurality of bonding pads formed in the third region of the printed circuit board; a plurality of electronic components attached to the printed circuit in the first region; a first electrical connector having a housing and a plurality of leads that extend from the housing attached to the first plurality of bonding pads, wherein an exterior surface of the housing of the electronic connector is spaced apart from the second region of the printed circuit board; a second electrical connector attached to printed circuit board; a flex cable coupled between the second electrical connector and the second plurality of bonding pads; an epoxy encapsulant covering the first region of the printed circuit board including the first plurality of electronic components; and a silicone encapsulant covering the second and third regions of the printed circuit board including the first and second pluralities of bonding pads. - View Dependent Claims (21)
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22. A method of forming a substrate assembly comprising:
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attaching a plurality of electronic components to a substrate; sealing a first region of the substrate with a first encapsulant; and sealing a second region of the substrate with a second encapsulant that has mechanical and chemical properties different from mechanical and chemical properties of the first encapsulant. - View Dependent Claims (23, 24, 25)
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Specification