Package of finger print sensor and fabricating method thereof

1. A semiconductor device comprising:

a semiconductor die comprising a first surface, a second surface opposite the first surface, and side surfaces connecting the first and second surfaces, where the first surface comprises an image sensor and a plurality of bond pads;

a first passivation layer covering the first surface of the semiconductor die and comprising openings that expose the bond pads;

first redistribution layers (RDLs) electrically connected to the bond pads exposed through the first passivation layer;

an encapsulation layer surrounding at least the side surfaces of the semiconductor die;

a plurality of vias electrically connected to the first RDLs at a first end of the vias and passing through the encapsulation layer;

second RDLs electrically connected to a second end of the vias and at least partially formed over the encapsulation layer;

a second passivation layer exposing first portions of the second RDLs and covering second portions of the second RDLs and the encapsulation layer; and

electrical connection structures coupled to the exposed first portions of the second RDLs.

2. The semiconductor device of claim 1 , wherein the first surface of the semiconductor die is free of material from the encapsulation layer.

3. The semiconductor device of claim 1 , wherein the encapsulation layer covers the side surfaces and the second surface of the semiconductor die.

4. The semiconductor device of claim 1 , wherein the second passivation layer covers both the second surface of the semiconductor die and at least a portion of the encapsulation layer.

5. The semiconductor device of claim 1 , wherein the electrical connection structures comprise lands of a land grid array.

6. The semiconductor device of claim 1 , wherein the electrical connection structures comprise conductive balls.

7. The semiconductor device of claim 1 , wherein the semiconductor device comprises a complete packaged finger print sensor without a printed wire board substrate.

8. A semiconductor device comprising:

a semiconductor die comprising a first surface, a second surface opposite the first surface, and side surfaces connecting the first and second surfaces, where the first surface comprises an image sensor and a plurality of bond pads;

an encapsulant surrounding the side surfaces and the second surface of the semiconductor die;

a first passivation layer covering the first surface of the semiconductor die and comprising openings that expose the bond pads;

first redistribution layers (RDLs) electrically connected to the bond pads exposed through the first passivation layer;

a plurality of vias electrically connected to the first RDLs at a first end of the vias and passing through the encapsulant;

second RDLs electrically connected to a second end of the vias and formed on the encapsulant;

a second passivation layer exposing first portions of the second RDLs and covering second portions of the second RDLs and at least a portion of the encapsulant; and

electrical connection structures coupled to the exposed first portions of the second RDLs.

9. The semiconductor device of claim 8 , wherein the first RDLs are formed, at least in part, by filling the openings of the first passivation layer.

10. The semiconductor device of claim 8 , wherein the first RDLs extend outside a footprint of the semiconductor die.

11. The semiconductor device of claim 8 , comprising a protection layer covering the first passivation layer and the first RDLs.

12. The semiconductor device of claim 11 , wherein the protection layer and the encapsulant are made of a same material.

13. The semiconductor device of claim 11 , wherein the protection layer and the encapsulant are made of different materials with similar respective coefficients of thermal expansion.

14. The semiconductor device of claim 8 , wherein at least one of the first RDLs comprises a ground pattern for protecting the image sensor against electrostatic discharge.

15. A semiconductor device comprising:

a semiconductor die comprising a first surface, a second surface opposite the first surface, and side surfaces connecting the first and second surfaces, where the first surface comprises a sensor and a bond pad;

a first passivation layer covering the first surface of the semiconductor die and comprising openings that expose the bond pad;

a first redistribution layer (RDL) electrically connected to the bond pad exposed through the first passivation layer;

an encapsulation layer surrounding at least the side surfaces of the semiconductor die;

a via electrically connected to the first RDL at a first end of the via and passing through the encapsulation layer;

a second RDL electrically connected to a second end of the via and at least partially formed over the encapsulation layer;

a second passivation layer exposing a first portion of the second RDL and covering a second portion of the second RDL and at least a portion of the encapsulation layer;

an electrical connection structure coupled to the exposed first portion of the second RDL; and

a protection layer covering the first passivation layer and the first RDL.

16. The semiconductor device of claim 15 , wherein at least a portion of the second RDL is formed directly on the encapsulation layer.

17. The semiconductor device of claim 15 , wherein the sensor comprises an image sensor.

18. The semiconductor device of claim 15 , wherein the sensor comprises a finger print sensor.

19. The semiconductor device of claim 15 , wherein the first RDL comprises a ground pattern for protecting the sensor against electrostatic discharge.

20. The semiconductor device of claim 15 , wherein each of the first RDL and the second RDL comprises a respective first end within a footprint of the semiconductor die and a respective second end outside of the footprint of the semiconductor die.