22-02-2018 дата публикации
Номер: US20180053712A1
A system, in some embodiments, comprises: a first surface of a lead frame; a second surface of the lead frame, opposite the first surface, said second surface having been etched; and one or more holes passing through said lead frame and coincident with the first and second surfaces, wherein said one or more holes are adapted to control fluid flow on said first surface. 1. A system , comprising:a first surface of a lead frame;a second surface of the lead frame, opposite the first surface, said second surface having been etched;one or more cylindrical holes passing through said lead frame and coincident with the first and second surfaces; andfluid on the first surface, the fluid at least partially encircling an aperture of said one or more holes,wherein said one or more holes are adapted to control flow of the fluid on said first surface.2. The system of claim 1 , wherein said fluid comprises reflowed solder.3. The system of claim 1 , wherein said second surface comprises a half-etched area.4. The system of claim 1 , wherein said fluid has a distribution on the first surface that is influenced at least in part by said one or more holes.5. The system of claim 1 , wherein said fluid partially fills said one or more holes.6. (canceled)7. The system of claim 1 , wherein said fluid straddles at least one aperture of said one or more holes.8. The system of claim 1 , wherein said fluid is selected from the group consisting of epoxy claim 1 , polyimide claim 1 , silicone adhesives claim 1 , hybrid organic adhesives claim 1 , soft solder claim 1 , and eutectic solder.9. The system of claim 1 , further comprising a die coupled to the first surface using solder claim 1 , a position of the die on the first surface is influenced at least in part by said one or more holes.10. The system of claim 9 , further comprising a clip coupling said lead frame to the die using solder claim 9 , said clip having one or more additional holes claim 9 , a position of the clip relative to the die ...
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