Semiconductor device and method of producing a high contrast identification mark

1. A semiconductor device, comprising:

a semiconductor die having a first surface for forming electronic circuitry; and

a coating layer disposed on a second surface of the semiconductor die to have a color that contrasts with a color of the semiconductor die, wherein the coating layer is patterned to expose a portion of the second surface to reveal information pertaining to the semiconductor device, and wherein the coating layer is patterned to form at least one opening that exposes the second surface of the semiconductor die, and wherein the semiconductor die has a recessed surface within the at least one opening that has a color different from a color of the second surface.

2. The semiconductor device of claim 1 , wherein the coating layer is formed on the second surface to a thickness less than about thirty-seven micrometers.

3. The semiconductor device of claim 1 , wherein the coating layer is formed with an organic material selected from the group consisting of an epoxy resin and a polymer.

4. The semiconductor device of claim 1 , wherein the coating layer is opaque and has a black color.

5. The semiconductor device of claim 1 , wherein the information includes an alphanumeric character having a height less than about three hundred micrometers.

6. The semiconductor device of claim 1 , further comprising a conductive bump formed on the first surface of the semiconductor die for making an external electrical and mechanical connection.

7. A method of making a semiconductor device, comprising the steps of:

disposing a coating layer over a surface of a semiconductor die;

patterning the coating layer to expose the surface to provide information about the semiconductor device, and wherein the patterning step forms at least one opening that exposes the surface of the semiconductor die; and

forming a recessed portion in the semiconductor die through the at least one opening so that the recessed portion has a color different from a color of the surface.

8. The method of claim 7 , wherein the step of patterning includes the step of selectively irradiating the coating layer.

9. The method of claim 8 , wherein the step of selectively irradiating includes the step of directing a laser beam to remove material from the coating layer.

10. The method of claim 9 , wherein the step of directing includes the step of forming an alphanumeric character with a font height less than about three hundred micrometers in the coating layer.

11. The method of claim 7 , wherein the step of disposing includes the step of forming the coating layer to a thickness of about thirty-seven micrometers.

12. The method of claim 7 , further comprising the step of curing the coating layer at a temperature less than about one hundred seventy-five degrees Celsius.

13. The method of claim 7 , wherein the step of disposing includes the step of applying the coating layer to a semiconductor wafer, further comprising the step of singulating the semiconductor wafer after the step of applying to form the semiconductor die.

14. A semiconductor device, comprising:

a semiconductor die formed with an electrical component; and

a semiconductor package having an organic material for encapsulating the semiconductor die, wherein openings are formed in the organic material to expose a conductive surface of the semiconductor package with a contrasting color to provide visible information pertaining to the semiconductor device.

15. The semiconductor device of claim 14 , wherein the conductive surface is disposed on a lead of the semiconductor package.