Shadow mask assembly

1. A shadow mask assembly comprising:

a securing assembly configured to hold a substrate that is configured to hold a plurality of dies, the securing assembly comprising:

an upper jig and a lower jig, wherein at least one of the upper jig and the lower jig includes a number of guide pins, and wherein a surface of the upper jig is coplanar with an upper surface of the lower jig; and

a shadow mask comprising holes for the guide pins, said holes allowing the guide pins freedom of motion in one direction;

wherein, the securing assembly includes a number of embedded magnets configured to secure the shadow mask to the securing assembly.

2. The assembly of claim 1 , wherein the shadow mask is made of a material that is attracted to the embedded magnets.

3. The assembly of claim 1 , wherein the surface of the upper jig is in direct contact with the shadow mask.

4. The assembly of claim 1 , wherein the embedded magnets are embedded both in the upper jig and the lower jig.

5. The assembly of claim 1 , wherein the one direction is toward a center of the shadow mask.

6. The assembly of claim 5 , wherein the freedom of motion is sufficient to allow for a thermal expansion of the shadow mask during a phosphor spray coating process.

7. The assembly of claim 5 , wherein a space between the guide pins and the shadow mask is sufficient to allow for a thermal expansion of the shadow mask due to exposure of a temperature of about 50 degrees Celsius.

8. The assembly of claim 1 , wherein the shadow mask is an integrated shadow mask.

9. The assembly of claim 1 , wherein the dies comprise LED dies.

10. A shadow mask assembly used in a spray coating process, the assembly comprising:

a bottom jig configured to be secured to a substrate having a plurality of Light Emitting Diode (LED) dies thereon, the bottom jig having a number of embedded magnets;

an upper jig secured to the bottom jig and including:

a number of guide pins; and

a number of embedded magnets;

wherein at least one surface of the upper jig is coplanar with an upper surface of the bottom jig; and

a shadow mask that includes a number of guide holes for the guide pins and being made of a material that is attracted to the magnets.

11. The assembly of claim 10 , wherein the guide holes are such that there is a space between the guide pins and a center of the shadow mask, the space being sufficient to allow for thermal expansion during the spray coating process.

12. The assembly of claim 10 , wherein the shadow mask includes an integrated shadow mask.

13. An assembly, comprising:

a securing assembly configured to hold a work piece, wherein the securing assembly includes a first jig, a second jig located below the first jig, the second jig including a plurality of guide pins that protrudes above an upper surface of the first jig;

a plurality of magnets disposed within the securing assembly; and

a shadow mask that includes a plurality of openings, the shadow mask containing a magnetically susceptible material, wherein each of the openings is configured to accommodate a respective one of the guide pins while still allowing room for movement of the shadow mask during thermal expansion of the shadow mask.

14. The assembly of claim 13 , wherein the securing assembly includes a well inside which the work piece is placed, the well having same dimensions as the work piece.

15. The assembly of claim 13 , wherein:

a first subset of the plurality of magnets is embedded within the first jig; and

a second subset of the plurality of magnets is embedded within the second jig.

16. The assembly of claim 15 , wherein the magnets in the first subset are non-overlapping with the magnets in the second subset.

17. The assembly of claim 13 , wherein the openings of the shadow mask are configured as a plurality of guide slots that are each oriented toward a center of the shadow mask.

18. The assembly of claim 13 , wherein the openings of the shadow mask each have an elliptical shape.

19. The assembly of claim 13 , wherein a surface of the first jig is coplanar with an upper surface of the second jig.

20. The assembly of claim 13 , wherein the first jig sits within the second jig.