Microelectronic package with illuminated backside exterior
View Patent ↗A microelectronic package is described with an illuminated backside exterior. In one example, the package has a package substrate, a die attached to the package substrate, a cover over the die and the package substrate, a lamp, and a screen over the die, externally visible and optically coupled to the lamp so that when the lamp is illuminated the illumination is externally visible through the screen.
1. An apparatus comprising:
a package substrate;
a die attached to the package substrate;
a cover over the die and the package substrate;
a lamp; and
a screen over the die, externally visible and optically coupled to the lamp so that when the lamp is illuminated the illumination is externally visible through the screen.
2. The apparatus of claim 1 , wherein the screen has a diffusion surface molded on a side opposite the die.
3. The apparatus of claim 1 , wherein the screen fills a chamber over the die and coupled to the lamp to receive illumination from the lamp so that the illumination in the chamber is visible through the screen.
4. The apparatus of claim 3 , further comprising a light guide between the lamp and the chamber to conduct light from the lamp to the chamber.
5. The apparatus of claim 4 , wherein the light guide is formed through the cover.
6. The apparatus of claim 3 , further comprising standoffs to support the screen at a distance over the die.
7. The apparatus of claim 1 , wherein the lamp is mounted to the package substrate and receives power from the package substrate.
8. The apparatus of claim 1 , wherein the lamp is mounted to the die on a side of the die opposite the substrate and wherein the lamp is electrically connected to the substrate by wires between the lamp and the substrate.
9. The apparatus of claim 1 , wherein the lamp is mounted to the die on a side of the die that is opposite the substrate and electrically connected to the die through silicon vias in the die.
10. The apparatus of claim 9 , wherein the screen fills a chamber over the die, the screen being coupled to the lamp through a light guide to receive illumination from the lamp through the light guide, the screen being supported by standoffs over the die, wherein the light guide is formed through a standoff.
11. The apparatus of claim 10 , wherein the lamp is attached within the light guide.
12. The apparatus of claim 1 , further comprising a lamp controller die attached to the package substrate and coupled to the lamp to control the operation of the lamp.
13. The apparatus of claim 12 , wherein the die is attached to the package substrate and wherein the lamp controller die is couple to the die through the package substrate.
14. A method comprising:
attaching a die to a package substrate;
attaching a lamp to the package substrate;
applying a molding compound over the die and the package substrate;
forming a screen over the die, the screen being optically coupled to the lamp so that when the lamp is illuminated, the illumination is visible through the screen; and
polishing the molding compound and the screen.
15. The method of claim 14 , wherein forming a screen over the die comprises forming a screen and attaching the screen over the die before applying the molding compound wherein applying the molding compound comprises applying the molding compound over the screen.
16. The method of claim 14 , wherein forming a screen over the die comprises forming a well in the molding compound and pouring a material into the well to form the screen.
17. The method of claim 14 , wherein attaching the lamp comprises attaching the lamp using wires between the lamp and the substrate.
18. A system comprising:
an external housing, the housing having a window;
a system board within the housing; and
a package attached to the system board, the package having an illumined backside positioned so that the illumination is visible through the window, the package having a package substrate, a die attached to the package substrate, a cover over the die and the package substrate, a lamp to generate the illumination, and a screen over the die, externally visible and optically coupled to the lamp so that when the lamp is illuminated the illumination is externally visible through the screen.
19. The system of claim 18 , wherein the lamp is attached to a side of the die opposite the package substrate and wherein the screen is over the lamp, the package further comprising a light guide to guide light from the lamp to the screen.
20. The system of claim 18 , further comprising a lamp controller attached to the system board to control the illumination of the lamp.