Methods of forming a microshield on standard QFN package
First Claim
1. A method of manufacturing an electronic package, comprising:
- providing a metallic lead frame having a component area on a surface of the metallic lead frame and a metallic structure associated with the component area, wherein the metallic structure comprises a plurality of connection portions, each connection portion comprising a plurality of connection leads;
providing an electronic component on the component area;
providing an overmold within and over the metallic lead frame such that the overmold covers the component area;
forming an opening through the overmold that exposes at least a section of the metallic structure;
applying an electromagnetic shield material within the opening and over the overmold to form an electromagnetic shield over the component area such that the electromagnetic shield is coupled to at least the section of the metallic structure exposed by the opening;
coupling the metallic structure to ground with a grounding portion;
partially etching the grounding portion through a first etch; and
partially etching the metallic lead frame on a subset of the plurality of connection leads such that remaining ones of the plurality of connection leads other than the subset form grounding leads different from the grounding portion for connection to ground with a second etch.
4 Assignments
0 Petitions
Accused Products
Abstract
Shielded electronic packages may have metallic lead frames to connect an electromagnetic shield to ground. In one embodiment, a metallic lead frame of the electronic package and a surface of the metallic lead frame defines a component area for attaching an electronic component. The metallic lead frame includes a metallic structure associated with the component area that may have a grounding element for connecting to ground and one or more signal connection elements, such as signal leads, for transmitting input and output signals. The electromagnetic shield connects to the metallic lead frame to safely connect to ground while maintaining the signal connection elements isolated from the shield.
198 Citations
19 Claims
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1. A method of manufacturing an electronic package, comprising:
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providing a metallic lead frame having a component area on a surface of the metallic lead frame and a metallic structure associated with the component area, wherein the metallic structure comprises a plurality of connection portions, each connection portion comprising a plurality of connection leads; providing an electronic component on the component area; providing an overmold within and over the metallic lead frame such that the overmold covers the component area; forming an opening through the overmold that exposes at least a section of the metallic structure; applying an electromagnetic shield material within the opening and over the overmold to form an electromagnetic shield over the component area such that the electromagnetic shield is coupled to at least the section of the metallic structure exposed by the opening; coupling the metallic structure to ground with a grounding portion; partially etching the grounding portion through a first etch; and partially etching the metallic lead frame on a subset of the plurality of connection leads such that remaining ones of the plurality of connection leads other than the subset form grounding leads different from the grounding portion for connection to ground with a second etch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing a plurality of electronic packages, comprising:
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providing a metallic lead frame having a plurality of component portions and a plurality of metallic structures wherein each of the plurality of metallic structures extends about a periphery of one of the plurality of component portions and each of the plurality of component portions defines a component area on a surface of the metallic lead frame; providing electronic components on component areas; providing an overmold within the metallic lead frame and over the surface of the metallic lead frame to cover the component areas; forming channels through the overmold about the periphery of each of the plurality of component portions, wherein the channels expose at least a section of each of the plurality of metallic structures; and applying an electromagnetic shield material over the overmold and in the channels to form electromagnetic shields wherein each electromagnetic shield is formed over the component area of one of the plurality of component portions and at least the section of each of the plurality of metallic structures is coupled to one of the electromagnetic shields. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification