Lead frame land grid array with routing connector trace under unit
A package includes a first plated area, a second plated area, a die attached to the first plated area, and a bond coupling the die to the second plated area. The package further includes a molding encapsulating the die, the bond, and the top surfaces of the first and second plated areas, such that the bottom surfaces of the first and second plated areas are exposed exterior to the package. Additional embodiments include a method of making the package.
1. A method of forming a semiconductor package comprising:
a. plating a plurality of contact traces on a metal substrate, each contact trace having a first end and a second end and a pathway between the first end and the second end, wherein the first end is wider than the pathway;
b. mounting semiconductor die substantially above the second ends of the contact traces;
c. electrically coupling the semiconductor die to at least one first end of at least one contact trace;
d. encapsulating the semiconductor die in an encapsulant;
e. removing the metal substrate, thereby exposing the contact traces; and
f. singulating the semiconductor package.
2. The method of claim 1 , further comprising forming at least one support structure about the second end of at least one contact trace.
3. The method of claim 2 , wherein forming support structures comprises forming at least one plated area extending outward from the second end of the at least one contact trace.
4. The method of claim 2 , wherein forming support structures comprises forming at least one plated area substantially circumscribing the second end of the at least one contact trace.
5. The method of claim 2 , wherein forming support structures comprises forming at least one plated area having a substantially arcuate shape.
6. The method of claim 2 , wherein forming support structures comprises forming at least one plated area having a substantially linear shape.
7. The method of claim 1 , wherein the metal substrate comprises copper.
8. The method of claim 1 , wherein plating a plurality of contact traces comprises plating layers comprising palladium, gold, and nickel.
9. A method of forming a semiconductor package comprising:
a. plating a plurality of contact traces on a metal substrate, wherein the contact traces comprise a plurality of plated layers, each contact trace having a first end and a second end and a pathway between the first end and the second end, wherein the first end is wider than the pathway;
b. electrically coupling a first semiconductor die substantially above at least a portion of the contact traces;
d. encapsulating at least a portion of the plurality of contact traces and the first semiconductor die in an encapsulant;
e. removing the metal substrate, thereby exposing the contact traces; and
f. singulating the semiconductor package.
10. The method of claim 9 , further comprising coupling a second semiconductor die with the first semiconductor die, wherein the second semiconductor die is coupled with the first end of at least one contact trace by a bondwire.
11. The method of claim 9 , further comprising coupling a second semiconductor die with the first semiconductor die, wherein the second semiconductor die is coupled with the first end of at least one contact trace by a solder bump.
12. The method of claim 9 , further comprising coupling a second semiconductor die with the first semiconductor die by a bondwire.
13. The method of claim 9 , further comprising coupling a second semiconductor die with the first semiconductor die by a solder bump.
14. The method of claim 9 , further comprising plating a die attach pad on the metal substrate, wherein the die attach pad receives the first semiconductor die, wherein the die attach pad comprises a plurality of plated layers.
15. A method of forming a semiconductor package comprising:
a. plating a plurality of contact traces on a metal substrate, wherein the contact traces comprise a plurality of plated layers, each contact trace having a first end and a second end and a pathway between the first end and the second end, wherein the first end is wider than the pathway;
b. electrically coupling the first end of at least one contact trace to an active surface of a semiconductor die;
d. encapsulating at least a portion of the semiconductor die and plurality of contact;
e. removing the metal substrate, thereby exposing the contact traces; and
f. singulating the semiconductor package.
16. The method of claim 15 , wherein the plating a plurality of contact traces includes forming a plurality of supports about the second ends of the plurality of contact traces.
17. The method of claim 16 , wherein the at least one support structure includes a rectangular protrusion integrated with the contact trace.
18. The method of claim 15 , wherein the pathway has at least one support structure that emanates outward therefrom.
19. The method of claim 15 , wherein a contact pad is located at the first end and an end point is located at the second end.
20. The method of claim 15 , further comprising applying solder resist epoxy on a side with the exposed contact traces without coating each second end in its entirety.