Method and system for manufacturing electronic packaging units
First Claim
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1. An automated method of fabricating electronic packaging units comprising the steps of providing a first substantially planar lead frame defining a first aperture and at least one first lead extending into the aperture;
- providing a second heat sink lead frame segment defining a second aperture and including at least one second lead extending into said second lead frame aperture, wherein the second lead is provided with at least one hole extending therethrough;
overlaying the first lead frame segment and the second heat sink lead frame segment and positioning the first and second leads apart from each other by a distance defining a space; and
riveting the first and second lead frame segments together with a deposit of flowable molding material into the space defined by the predetermined distance between the first lead and the second heat sink lead, the molding material flowing though the at least one hole in the second heat sink lead frame portion, thereby forming said molded body, wherein the molded body is structured to expose contact surfaces for each of the first lead and second lead.
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Abstract
A method and system for fabricating electronic packaging units which include a molded body and a plurality of electrically conductive leads protruding therefrom. The packaging units are made by overlaying lead frames having leads and then depositing molding material on the leads. The packaging units are manufactured in an assembly line process which includes a feeder to feed the lead frames and a molder to deposit the molding material.
24 Citations
30 Claims
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1. An automated method of fabricating electronic packaging units comprising the steps of providing a first substantially planar lead frame defining a first aperture and at least one first lead extending into the aperture;
- providing a second heat sink lead frame segment defining a second aperture and including at least one second lead extending into said second lead frame aperture, wherein the second lead is provided with at least one hole extending therethrough;
overlaying the first lead frame segment and the second heat sink lead frame segment and positioning the first and second leads apart from each other by a distance defining a space; and
riveting the first and second lead frame segments together with a deposit of flowable molding material into the space defined by the predetermined distance between the first lead and the second heat sink lead, the molding material flowing though the at least one hole in the second heat sink lead frame portion, thereby forming said molded body, wherein the molded body is structured to expose contact surfaces for each of the first lead and second lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- providing a second heat sink lead frame segment defining a second aperture and including at least one second lead extending into said second lead frame aperture, wherein the second lead is provided with at least one hole extending therethrough;
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17. An electronic packaging unit comprising a first substantially planar lead frame defining a first aperture and at least one first lead extending into the aperture, a second heat sink lead frame segment which includes a second lead defining a second aperture and including at least one second lead extending into said second lead frame aperture, wherein the second lead is provided with at least one hole extending therethrough;
- the first lead and the second heat sink lead positioned in an overlaying arrangement in which the first and second leads are spaced apart from each other;
a molded body including a hardened molding material that, when deposited in a flowable state, enters the space between the first lead and the second heat sink lead, and flows though the at least one hole in the second heat sink lead frame portion, thereby fixing the first and second leads within the molded body, wherein the molded body is structured to expose contact surfaces for each of the first lead and second lead. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- the first lead and the second heat sink lead positioned in an overlaying arrangement in which the first and second leads are spaced apart from each other;
Specification