Integrated circuit package with pre-wetted contact sidewall surfaces
An integrated circuit (IC) package includes an encapsulation package that contains an integrated circuit die attached to a lead frame. A set of contacts is formed on the package that each have an exposed contact sidewall surface and an exposed contact lower surface. A protective layer of solder wettable material covers each contact sidewall surface.
1. An integrated circuit (IC) package comprising:
an encapsulation package containing an integrated circuit die attached to a lead frame;
a set of contacts each having a contact sidewall surface and a contact lower surface; and
a protective layer of wicked-up material covering each contact sidewall surface.
2. The IC package of claim 1 , in which the protective layer of wicked-up material includes silver nanoparticles.
3. The IC package of claim 1 , in which the protective layer of wicked-up material is solder.
4. The IC package of claim 1 , in which the lead frame is copper.
5. The IC package of claim 1 , in which each exposed contact lower surface is covered with tin plating.
6. An integrated circuit package, comprising:
an encapsulation package containing an integrated circuit die attached to a lead frame; and
a set of contacts each having a contact sidewall surface and a contact lower surface, wicked-up pre-tinning material covering the contact sidewall surfaces.
7. The integrated circuit package of claim 6 , in which electrical contacts on the integrated circuit die are electrically connected to respective ones of the set of contacts.
8. The integrated circuit package of claim 6 , in which the layer of wicked-up pre-tinning material includes silver nanoparticles.
9. The integrated circuit package of claim 7 , in which the layer of wicked-up pre-tinning material includes silver nanoparticles.
10. The integrated circuit package of claim 6 , in which the layer of wicked-up pre-tinning material is solder.
11. The integrated circuit package of claim 7 , in which the layer of wicked-up pre-tinning material is solder.
12. The integrated circuit package of claim 6 , in which the wicked-up pre-tinning material is deposited using an ink jet printer.
13. The integrated circuit package of claim 7 , in which the wicked-up pre-tinning material is deposited using an ink jet printer.
14. The integrated circuit package of claim 6 , in which the lead frame is copper.
15. The integrated circuit package of claim 7 , in which the lead frame is copper.
16. The integrated circuit package of claim 6 , in which each exposed contact lower surface is covered with tin plating.
17. The integrated circuit package of claim 7 , in which each exposed contact lower surface is covered with tin plating.