Stackable via package and method
View Patent ↗A stackable via package includes a substrate having an upper surface and a trace on the upper surface, the trace including a terminal. A solder ball is on the terminal. The solder ball has a solder ball diameter A and a solder ball height D. A via aperture is formed in a package body enclosing the solder ball to expose the solder ball. The via aperture includes a via bottom having a via bottom diameter B and a via bottom height C from the upper surface of the substrate, where A<B and 0=<C<½×D. The shape of the via aperture prevents solder deformation of the solder column formed from the solder ball as well as prevents solder bridging between adjacent solder columns.
1. An electronic component assembly comprising:
a substrate;
a plurality of top side terminals on a top side of the substrate;
a plurality of bottom side terminals on a bottom side of the substrate;
a plurality of pins on the top side terminals;
a semiconductor die on the top side of the substrate; and
an encapsulant that encapsulates the top side of the substrate and the semiconductor die, wherein:
each pin of the plurality of pins extends upward from, and is entirely directly above, a respective one of the plurality of top side terminals; and
each pin of the plurality of pins extends upward from its respective top side terminal completely through the encapsulant and comprises at least a respective top pin portion that protrudes from the encapsulant.
2. The electronic component of claim 1 , wherein the encapsulant comprises a top principal surface that is parallel to the top side of the substrate.
3. The electronic component of claim 2 , wherein the encapsulant comprises a plurality of cavities in the top principal surface, wherein at least a portion of each of the plurality of pins is positioned in a respective cavity of the plurality of cavities.
4. The electronic component of claim 1 , wherein the encapsulant comprises a plurality of upper side encapsulant levels, and wherein:
the plurality of upper side encapsulant levels comprises:
a principal level that is parallel to the top side of the substrate; and
a shelf level that is lower than the principal level; and
the respective top pin portion of each pin of the plurality of pins protrudes from the encapsulant at the shelf level.
5. The electronic component of claim 1 , wherein each pin of the plurality of pins comprises a top end that is higher than a top surface of the encapsulant.
6. The electronic component of claim 1 , wherein the respective top pin portion of each pin of the plurality of pins is laterally surrounded by solder.
7. The electronic component of claim 1 , wherein each pin of the plurality of pins comprises:
a lower end that is attached to the respective top side terminal of the substrate in a first manner; and
an upper end that is attached to an upper terminal in a second manner different from the first manner.
8. An electronic component assembly comprising:
a substrate;
a plurality of terminals on a top side of the substrate;
a semiconductor die on the top side of the substrate;
a plurality of pins on the terminals and only directly above the terminals, wherein each of the plurality of pins extends upward from a respective one of the plurality of terminals generally orthogonally to the top side of the substrate; and
an encapsulant that encapsulates the top side of the substrate and the semiconductor die and comprises a plurality of upper encapsulant levels, wherein the plurality of upper encapsulant levels comprises:
a principal level that is parallel to the top side of the substrate; and
a shelf level that is lower than the principal level,
wherein each pin of the plurality of pins extends upward from its respective terminal completely through the encapsulant and comprises a respective top pin portion that protrudes from the shelf level of the encapsulant.
9. The electronic component assembly of claim 8 , wherein each pin of the plurality of pins comprises a top end that is higher than the principal level of the encapsulant.
10. The electronic component assembly of claim 8 , wherein each pin of the plurality of pins extends through a respective aperture of the encapsulant that is wider than the pin.
11. The electronic component assembly of claim 8 , wherein each pin of the plurality of pins protrudes from a respective shelf level surface of the encapsulant.
12. The electronic component assembly of claim 8 , wherein the encapsulant does not contact the plurality of pins at the shelf level.
13. The electronic component assembly of claim 8 , wherein the encapsulant comprises a sloped surface that extends between the principal level and the shelf level.
14. The electronic component assembly of claim 8 , wherein the shelf level is positioned laterally outside a perimeter of the semiconductor die.
15. The electronic component assembly of claim 8 , wherein the principal level of the encapsulant entirely covers a top side of the semiconductor die.
16. The electronic component assembly of claim 8 , wherein a top side of the semiconductor die is electrically coupled to the top side of the substrate with bond wires, and the principal level of the encapsulant entirely covers the bond wires.
17. The electronic component assembly of claim 16 , wherein the respective top pin portion of each of the plurality of pins is laterally surrounded by solder.
18. A method of making an electronic component assembly, the method comprising:
receiving a lower component comprising:
a substrate;
a plurality of top side terminals on a top side of the substrate;
a plurality of bottom side terminals on a bottom side of the substrate; and
a semiconductor die on the top side of the substrate;
providing a plurality of pins on the top side terminals; and
encapsulating the top side of the substrate and the semiconductor die, wherein:
each pin of the plurality of pins extends upward from, and is entirely directly above, a respective one of the plurality of top side terminals; and
each pin of the plurality of pins extends upward from its respective top side terminal completely through the encapsulant and comprises at least a respective top pin portion that protrudes from the encapsulant.
19. The method of claim 18 , wherein the respective top pin portion of each pin of the plurality of pins is laterally surrounded by solder.
20. The method of claim 18 , wherein the encapsulant comprises a plurality of upper side encapsulant levels, and wherein:
the plurality of upper side encapsulant levels comprises:
a principal level that is parallel to the top side of the substrate; and
a shelf level that is lower than the principal level; and
the respective top pin portion of each pin of the plurality of pins protrudes from the encapsulant at the shelf level.