Integrated circuit mount system with solder mask pad
An integrated circuit mount system includes an integrated circuit, a solder mask for the integrated circuit, and a solder mask pad on the substrate with the solder mask.
1. A method to fabricate an integrated circuit mount system comprising:
providing a substrate having an active surface;
stacking an integrated circuit over the substrate;
forming a solder mask for the integrated circuit;
forming a solder mask pad directly on the active surface of the substrate with the solder mask; and
forming a pre-solderable layer directly on the active surface of the substrate and directly in contact with sides of the solder mask pad and a vertical side of the solder mask, the vertical side extending from the active surface to a horizontal side of the solder mask facing away from the active side.
2. The method as claimed in claim 1 wherein forming the solder mask pad includes forming the solder mask pad in an opening in the solder mask.
3. The method as claimed in claim 1 wherein forming the pre-solderable layer forms a metal layer on the substrate.
4. The method as claimed in claim 1 wherein forming the solder mask pad includes forming the solder mask pad having a height lower than the height of a bump or ball pad.
5. The method as claimed in claim 1 wherein forming the solder mask pad includes forming the solder mask pad having a planar dimension smaller than a planar dimension of a bump or ball pad.
6. A method to fabricate an integrated circuit mount system comprising:
providing a substrate having an active surface;
stacking an integrated circuit, having a bond pad, over the substrate;
forming a solder mask for the bond pad of the integrated circuit;
forming a solder mask pad on the active surface of the substrate with the solder mask;
forming a pre-solderable layer directly on the active surface of the substrate and directly in contact with sides of the solder mask pad and a vertical side of the solder mask, the vertical side extending from the active surface to a horizontal side of the solder mask facing away from the active side; and
forming a connector directly on the pre-solderable layer and the solder mask pad.
7. The method as claimed in claim 6 wherein forming the solder mask pad includes forming the solder mask pad self-aligned to the solder mask.
8. The method as claimed in claim 6 wherein forming the solder mask pad includes forming the solder mask pad having a width less than 150 um.
9. The method as claimed in claim 6 wherein forming the solder mask pad includes applying solder-on-pad over the solder mask pad.
10. The method as claimed in claim 6 wherein forming a connector includes providing improved reliability of an intermetallic layer under the connector.
11. An integrated circuit mount system comprising:
a substrate having an active surface;
an integrated circuit over the substrate;
a solder mask for the integrated circuit;
a solder mask pad directly on the active surface of the substrate with the solder mask; and
a pre-solderable layer directly on the active surface of the substrate and directly in contact with sides of the solder mask pad and a vertical side of the solder mask extending from the active surface to a horizontal side of the solder mask facing away from the active side.
12. The system as claimed in claim 11 wherein the solder mask pad includes the solder mask pad in an opening in the solder mask.
13. The system as claimed in claim 11 wherein the pre-solderable layer forms a metal layer on the substrate.
14. The system as claimed in claim 11 wherein the solder mask pad includes the solder mask pad having a height lower than the height of a bump or ball pad.
15. The system as claimed in claim 11 wherein the solder mask pad includes the solder mask pad having a planar dimension smaller than a planar dimension of a bump or ball pad.
16. The system as claimed in claim 11 wherein:
the integrated circuit having a bond pad;
the solder mask for the bond pad of the integrated circuit;
the solder mask pad on the substrate with the solder mask; and further comprising:
a connector on the solder mask pad.
17. The system as claimed in claim 16 wherein the solder mask pad includes the solder mask pad self-aligned to the solder mask.
18. The system as claimed in claim 16 wherein the solder mask pad includes the solder mask pad having a width less than 150 um.
19. The system as claimed in claim 16 wherein the solder mask pad includes solder-on-pad over the solder mask pad.
20. The system as claimed in claim 16 wherein a connector includes improved reliability of an intermetallic layer under the connector.