Chip packaging structure
View Patent ↗A chip packaging structure comprising a chip, a plurality of conductive pillars surrounding the chip, an encapsulation encapsulating the chip and the conductive pillars, and a connecting layer is provided. The encapsulation has a first side and a second side corresponding to the first side. The connecting layer is disposed at the first side of the encapsulation and electrically connected between the chip and the conductive pillars. Furthermore, a chip packaging process accompanying the chip packaging structure is also provided. The chip packaging structure is more useful and powerful and is suitable for various chip packaging applications, and the chip packaging process can reduce the manufacturing time and save the production cost.
1. A chip packaging structure, comprising:
a chip;
a plurality of conductive pillars surrounding the chip;
an encapsulation encapsulating the chip and the conductive pillars, wherein the encapsulation has a first side and a second side opposite to the first side, and the encapsulation consists of a single photosensitive material;
a connecting layer disposed at the first side of the encapsulation and electrically connected between the chip and a surface of the conductive pillars most approximate to the first side and partially exposed at the first side of the encapsulation, wherein the connecting layer is directly connected to the chip, and
an external circuitry disposed having a first side and a second side, wherein the first side of the external circuitry is disposed toward the second side of the encapsulation, and no chip is disposed at the second side of the external circuitry.
2. The chip packaging structure according to claim 1 , further comprising a trace layer disposed at the second side of the encapsulation and electrically connected to the conductive pillars.
3. The chip packaging structure according to claim 2 , further comprising a plurality of solder balls disposed at the second side of the encapsulation and electrically connected to the conductive pillars through the trace layer.
4. The chip packaging structure according to claim 2 , further comprising an adhesive layer disposed between the chip and the trace layer.
5. The chip packaging structure according to claim 1 , wherein each conductive pillar has a first end surface at the first side of the encapsulation and a second end surface at the second side of the encapsulation, and at least one of the first end surface and the second end surface of each conductive pillar is exposed by the encapsulation.
6. The chip packaging structure according to claim 5 , further comprising a plurality of solder balls disposed on the second end surface of each conductive pillar as the encapsulation exposing the second end surface of each conductive pillar.
7. The chip packaging structure according to claim 1 , wherein the chip is a sensing device having an active region at the first side of the encapsulation.
8. The chip packaging structure according to claim 7 , wherein the encapsulation has an opening exposing the active region of the sensing device.
9. The chip packaging structure according to claim 8 , further comprising a transparent covering plate disposed at the first side of the encapsulation for covering the opening.
10. The chip packaging structure according to claim 1 , wherein the material of the encapsulation is a photosensitive material.
11. A stacked chip packaging structure, comprising:
a plurality of chip packaging modules, wherein two adjacent chip packaging modules are vertically stacked with each other and each chip packaging module comprises:
a chip;
a plurality of conductive pillars surrounding the chip;
an encapsulation encapsulating the chip and the conductive pillars, wherein the encapsulation has a first side and a second side opposite to the first side, and the encapsulation consists of a single photosensitive material; and
a connecting layer disposed at the first side of the encapsulation and electrically connected between the chip and a surface of the conductive pillars most approximate to the first side and partially exposed at the first side of the encapsulation, wherein the connecting layer is directly connected to the chip;
a plurality of connecting elements, electrically connected between the corresponding conductive pillars of two adjacent chip packaging modules; and
only one external circuitry disposed toward the second side of the encapsulation of a first chip packaging module, wherein the first chip package module is the most approximate to the external circuitry among the chip packaging modules.
12. The stacked chip packaging structure according to claim 11 , wherein each chip packaging module further comprises a trace layer disposed at the second side of the encapsulation and electrically connected to the conductive pillars and the corresponding connecting elements.
13. The stacked chip packaging structure according to claim 12 , wherein each chip packaging module further comprises an adhesive layer disposed between the chip and the trace layer.
14. The stacked chip packaging structure according to claim 11 , wherein each conductive pillar has a first end surface at the first side of the corresponding encapsulation and a second end surface at the second side of the corresponding encapsulation, and at least one of the first end surface and the second end surface of each conductive pillar is exposed by the corresponding encapsulation.
15. The stacked chip packaging structure according to claim 14 , wherein each connecting element is disposed on the second end surface of the corresponding conductive pillar as the corresponding encapsulation exposing the second end surface of the corresponding conductive pillar.