Build-up package for integrated circuit devices, and methods of making same
A device is disclosed which includes, in one illustrative example, an integrated circuit die having an active surface and a molded body extending around a perimeter of the die, the molded body having lips that are positioned above a portion of the active surface of the die. Another illustrative example includes an integrated circuit die having an active surface, a molded body extending around a perimeter of the die and a CTE buffer material formed around at least a portion of the perimeter of the die adjacent the active surface of the die, wherein the CTE buffer material is positioned between a portion of the die and a portion of the molded body and wherein the CTE buffer material has a coefficient of thermal expansion that is intermediate a coefficient of thermal expansion for the die and a coefficient of thermal expansion for the molded body.
1. A packaged integrated circuit device, comprising:
a die having a first lateral perimeter and an active surface;
a bond pad on the active surface;
a layer of insulating material on the active surface, the layer of insulating material being narrower than the first lateral perimeter of the die, wherein the layer of insulating material has a first surface contacting the bond pad and completely covering the bond pad, and a second surface opposite the first surface, wherein the layer of insulating material defines an interface by inwardly removing a portion of the insulating material to a predetermined width;
a molded body contacting the first lateral perimeter of the die, the layer of insulating material, and a portion of the active surface of the die, the molded body having a second lateral perimeter, the molded body having a portion completely and laterally surrounding the layer of insulating material; and
a tape section on the second surface of the layer of insulating material and extending beyond the second lateral perimeter of the mold body.
2. The packaged integrated circuit device of claim 1 wherein a portion of the molded body extends between the active surface and the tape section.
3. The packaged integrated circuit device of claim 2 wherein the die has a backside opposite the active surface, and wherein the molded body has a thickness approximately equal to a distance between the tape section and the backside of the die.
4. The packaged integrated circuit device of claim 2 wherein the tape section is adhered to the layer of insulating material with a releasable adhesive that allows the tape section to be removed from the layer of insulating material without harming the device or removing material from the layer of insulating material or the molded body.
5. The packaged integrated circuit device of claim 1 , further comprising a plurality of dies, each with a layer of insulating material contacting the tape section, wherein the molded body comprises a single molded body contacting the first lateral perimeter of individual dies on the tape section.
6. The packaged integrated circuit device of claim 1 wherein the portion laterally surrounding the layer of insulating material includes a lip contacting the interface the layer of insulating material.
7. The packaged integrated circuit device of claim 6 wherein the lip extends inwardly beyond the lateral perimeter of the die.
8. The packaged integrated circuit device of claim 6 wherein the lip extends inwardly so as to reach the active surface of the die.
9. The packaged integrated circuit device of claim 1 wherein the molded body includes an extension contacting a side of the layer of insulating material.
10. The packaged integrated circuit device of claim 9 wherein the extension extends inwardly beyond the lateral perimeter of the die.
11. The packaged integrated circuit device of claim 9 wherein the extension extends inwardly so as to reach the active surface of the die.
12. The packaged integrated circuit device of claim 1 wherein the predetermined width ranges from 100 μm to 500 μm.
13. The packaged integrated circuit device of claim 1 wherein the predetermined width is about 300 μm.