Embedded electrical component surface interconnect
View Patent ↗An electrical component package is disclosed comprising: an electrical component having an embedded surface, a structure attached to the electrical component opposite the embedded surface, a conductive adhesive directly attached to the embedded surface, where the conductive adhesive is shaped to taper away from the embedded surface, and an encapsulation material covering the conductive adhesive and the electrical component. In various embodiments, the tapered conductive adhesive facilitates the securing of the conductive adhesive to the electrical component by the encapsulation material. Also disclosed are various methods of forming an electrical component package having a single interface conductive interconnection on the embedded surface. The conductive interconnection is configured to maintain an interconnection while under stress forces. Further disclosed in a method of applied a conductive adhesive that enables design flexibility regarding the shape and depth of the conductive interconnection.
1. A method of forming an electrical component package, the method comprising:
applying conductive adhesive material to an electrical component to form a build-up shape, wherein
the electrical component has a first side attached to a support structure surface,
the build-up shape has a first surface in contact with a second side of the electrical component, the second side opposing the first side,
the build-up shape has a second surface opposing the first surface, and
a first area of the first surface is larger than a second area of the second surface;
applying an encapsulation material over the electrical component and the build-up shape, wherein
the encapsulation material has a bottom surface in contact with the support structure surface,
the encapsulation material has a top surface opposing the bottom surface, and
the encapsulation material extends from the support structure surface to the to surface and surrounds and covers the electrical component and the build-up shape; and
forming a conductive interconnect by removing a top portion of the encapsulation material that includes the to surface of the encapsulation material to a specific level in order to expose the build-up shape, wherein the build-up shape has an exposed top surface that is level with an exposed top surface of the encapsulation material after the removing.
2. The method of claim 1 , further comprising at least partially curing the conductive adhesive material prior to the applying the encapsulation material.
3. The method of claim 1 , further comprising curing the conductive adhesive material and the encapsulation material after the applying the encapsulation material.
4. The method of claim 1 , wherein the conductive adhesive material comprises adhesive resin and electrically conducting particles.
5. The method of claim 1 , wherein the forming the conductive interconnect further comprises removing a top portion of the build-up shape that includes the second surface of the build-up shape, wherein the exposed top surface of the build-up shape is exposed after the top portion of the build-up shape is removed, and wherein the exposed top surface of the build-up shape has an area larger than the second area of the second surface of the build-up shape.
6. The method of claim 1 , wherein the conductive adhesive material has a viscosity in a range of about 1 kcps to about 20 kcps in an uncured state.
7. The method of claim 1 , wherein the conductive adhesive material has a thixotropic index in a range of about 2 to about 8 in an uncured state.
8. The method of claim 1 , wherein the electrical component is a die, and wherein the die is part of a wafer during the applying the conductive adhesive material to the die, and wherein the die is singulated from the wafer after the applying the encapsulation material.
9. The method of claim 1 , wherein the removing exposes the second surface of the build-up shape as the exposed top surface of the build-up shape.
10. The method of claim 1 , wherein the encapsulation material secures the build-up shape to the electrical component.
11. The method of claim 1 , wherein the conductive adhesive material is applied as a plurality of structures to the electrical component.
12. The method of claim 1 , wherein the conductive adhesive material is an electrically conductive adhesive (ECA), and wherein the conductive interconnect is configured to electrically connect an embedded surface of the electrical component to an outer surface of the electrical component package.
13. The method of claim 1 , wherein the conductive adhesive material is a thermally conductive adhesive (TCA), and wherein the conductive interconnect is configured to thermally connect an embedded surface of the electrical component to an outer surface of the electrical component package.
14. The method of claim 1 , wherein the conductive adhesive material is an optically conductive adhesive, and wherein the conductive interconnect is configured to optically connect an embedded surface of the electrical component to an outer surface of the electrical component package.
15. The method of claim 1 , wherein the build-up shape comprises at least one of a group of shapes including a conical shape, a rectangular shape, a circular shape, and a trapezoidal shape.