Wafer level pre-packaged flip chip
A pre-packaged flip chip package that includes one or more dice on a semiconductor wafer is disclosed. In the various embodiments, an adhesive layer may be applied to a first side of a finished wafer, having connector pads formed thereon. The adhesive layer may include openings through which the connector pads may be accessed. Conductive elements may be positioned within the adhesive, and configured to electrically couple to the conductive elements.
1. A semiconductor wafer, comprising:
a plurality of semiconductor devices formed on the wafer, wherein each device includes one or more connection pads that are exposed on a first surface of the wafer and electrically coupled to the semiconductor device;
an adhesive layer disposed on the first surface that includes a plurality of openings extending through the adhesive layer and aligned with the connection pads, wherein at least one of the openings includes a chamfered area that is spaced apart from the connection pads;
a conductive material disposed in the plurality of openings and operable to provide an electrical conduction path that extends through the adhesive layer; and
a protective coating disposed on an opposing second side of the wafer.
2. The semiconductor wafer of claim 1 , wherein the wafer comprises at least one of a silicon-on-sapphire wafer, a silicon-on-insulator wafer and a semiconductor wafer that includes one or more epitaxial layers.
3. The semiconductor wafer of claim 1 , wherein the conductive material further comprises a solder element.
4. The semiconductor wafer of claim 3 , wherein the solder element further comprises a cylindrically-shaped solder element.
5. The semiconductor wafer of claim 3 , wherein the solder element further comprises a spherical-shaped solder element.
6. The semiconductor wafer of claim 1 , wherein the conductive material further comprises a conductive polymer.
7. The semiconductor wafer of claim 1 , wherein the conductive material further comprises a conductive paste.
8. The semiconductor wafer of claim 1 , wherein the adhesive layer further comprises a fluid elastomeric material.
9. The semiconductor wafer of claim 1 , wherein the adhesive layer further comprises a dry adhesive film.
10. The semiconductor wafer of claim 9 , wherein the dry adhesive film further comprises a pressure sensitive film.
11. The semiconductor wafer of claim 1 , wherein the adhesive layer is cured by exposing the adhesive layer to at least one of a heat source, a source of electromagnetic radiation and a source of ionizing radiation.
12. The semiconductor wafer of claim 1 , wherein the conductive material extends through the chamfered area.
13. The semiconductor wafer of claim 1 , wherein the protective coating is an epoxy-based material.
14. The semiconductor wafer of claim 8 , wherein the solder element further comprises a spherical-shaped solder element.