Method of stimulating die circuitry and structure therefor
View Patent ↗A method includes providing a wafer having a first die and a scribe grid, where the first die has die circuitry and a bond pad electrically connected to the die circuitry, and where the scribe grid has a scribe grid pad electrically connected to the die circuitry. The method further includes accessing the scribe grid pad to stimulate the die circuitry. A wafer includes a first die. The first die includes die circuitry, a plurality of conductive layers, and a bond pad electrically connected to the die circuitry via at least one conductive layer of the plurality of conductive layers. The wafer includes a scribe grid having a scribe grid pad, and an interconnect electrically connecting the scribe grid pad to the die circuitry. The plurality of die of the wafer can then be singulated, and at least one of the singulated die can be packaged.
1. A method comprising:
providing a wafer having a first die and a scribe grid, the first die having die circuitry and a bond pad electrically connected to the die circuitry, the scribe grid having a scribe grid pad electrically connected to the die circuitry;
accessing the scribe grid pad to stimulate the die circuitry; and
disconnecting the die circuitry from the scribe grid pad prior to singulation.
2. The method of claim 1 , wherein providing the wafer comprises:
forming the die circuitry;
forming a plurality of conductive layers electrically connected to the die circuitry;
forming the bond pad electrically connected to the die circuitry via at least one conductive layer of the plurality conductive layers; and
forming the scribe grid pad in the scribe grid electrically connected to the die circuitry via at least one conductive layer of the plurality conductive layers.
3. The method of claim 1 , wherein providing the wafer comprises providing the wafer having the scribe grid, wherein the scribe grid further comprises scribe grid circuitry electrically connected to the scribe grid pad.
4. The method of claim 3 , wherein providing the wafer comprises providing the wafer having the scribe grid circuitry, wherein the scribe grid circuitry comprises only passive circuitry.
5. The method of claim 3 , wherein providing the wafer comprises providing the wafer having the scribe grid circuitry, wherein the scribe grid circuitry comprises active circuitry.
6. The method of claim 3 , further comprising accessing the scribe grid pad to test the scribe grid circuitry.
7. The method of claim 1 , wherein providing the wafer comprises providing the wafer, wherein the wafer has a second die, the second die having second die circuitry, wherein the scribe grid pad is electrically connected to the second die circuitry.
8. The method of claim 1 , further comprising singulating and packaging the first die.
9. The method of claim 1 , wherein providing the wafer comprises:
forming an interconnect extending from a conductive layer of the first die to a conductive layer of the scribe grid, wherein the bond pad is over the conductive layer of the first die and the scribe grid pad is over the conductive layer of the scribe grid, and the interconnect electrically connects the die circuitry to the scribe grid pad.
10. The method of claim 1 , wherein providing the wafer comprises:
forming an interconnect over at least a portion of the bond pad and over at least a portion of the scribe grid pad, wherein the interconnect electrically connects the bond pad to the scribe grid pad.
11. The method of claim 1 , wherein scribe grid pad is electrically connected to the die circuitry of the first die in a layer underlying the top surface of the wafer.
12. A method comprising:
receiving a wafer having a plurality of die and a scribe grid, a first die of the plurality of die having die circuitry and a bond pad electrically connected to the die circuitry, and the scribe grid having a scribe grid pad electrically connected to the die circuitry of the first die;
disconnecting the scribe grid pad from the die circuitry of the first die;
subsequently singulating the plurality of die; and
packaging at least one die of the plurality of die.
13. The method of claim 12 , wherein scribe grid pad is electrically connected to the die circuitry of the first die in a layer underlying the top surface of the wafer.
14. The method of claim 12 , wherein providing the wafer comprises:
forming the die circuitry;
forming a plurality of conductive layers electrically connected to the die circuitry;
forming the bond pad electrically connected to the die circuitry via at least one conductive layer of the plurality conductive layers; and
forming the scribe grid pad in the scribe grid electrically connected to the die circuitry via at least one conductive layer of the plurality conductive layers.
15. The method of claim 12 , wherein providing the wafer comprises providing the wafer having the scribe grid, wherein the scribe grid further comprises scribe grid circuitry electrically connected to the scribe grid pad.
16. The method of claim 15 , wherein providing the wafer comprises providing the wafer having the scribe grid circuitry, wherein the scribe grid circuitry comprises only passive circuitry.
17. The method of claim 15 , wherein providing the wafer comprises providing the wafer having the scribe grid circuitry, wherein the scribe grid circuitry comprises active circuitry.
18. The method of claim 15 , further comprising accessing the scribe grid pad to test the scribe grid circuitry.
19. The method of claim 12 , wherein providing the wafer comprises providing the wafer, wherein the wafer has a second die, the second die having second die circuitry, wherein the scribe grid pad is electrically connected to the second die circuitry.
20. The method of claim 12 , wherein providing the wafer comprises:
forming an interconnect extending from a conductive layer of the first die to a conductive layer of the scribe grid, wherein the bond pad is over the conductive layer of the first die and the scribe grid pad is over the conductive layer of the scribe grid, and the interconnect electrically connects the die circuitry to the scribe grid pad.