PACKAGING METHOD OF SEMICONDUCTOR DEVICE
In a packaging method of semiconductor device, firstly, a wafer including a number of dies is provided. The wafer has an active surface and a back surface. The active surface adheres to a carrier. Subsequently, a number of openings are formed in each of the dies. Then, an insulating layer is formed on the back surface and on the side walls of the openings. A metal layer is formed to cover the insulating layer and the bottoms of the openings. A pattern protective layer is formed to cover the metal layer and to expose the metal layer outside the openings. Afterwards, the carrier is removed and the wafer is sawed. Later, a transparent substrate having a number of package units is provided. A spacer is formed at peripheral of each of the package units. A number of good dies are choose from the dies and disposed on the spacer.
1 . A packaging method of a semiconductor device, comprising:
providing a wafer comprising a plurality of dies, the wafer having an active surface and a back surface opposite to the active surface, the active surface of the wafer adhering to a carrier;
forming a plurality of openings through the active surface and the back surface of the wafer in each of the dies;
forming an insulating layer on the back surface of the wafer and on the side walls of the openings;
forming a metal layer to cover the insulating layer and the bottoms of the openings;
forming a pattern protective layer to cover the metal layer and to expose the portions of the metal layer outside the openings of each of the die;
removing the carrier and sawing the wafer so as to separate the dies;
providing a transparent substrate having a plurality of package units, a spacer being formed at peripheral of each of the package units; and
choosing a plurality of good dies from the dies and disposing the good dies on the spacer of each of the package units.
2 . The packaging method as claimed in claim 1 , further comprising a wafer thinning step before the openings are formed.
3 . The packaging method as claimed in claim 1 , further comprising a step of testing known good die before the good dies are choose from the dies.
4 . The packaging method as claimed in claim 1 , wherein the active surface and the carrier adhere to each other by an adhesive layer disposed between the active surface and the carrier.
5 . The packaging method as claimed in claim 5 , a material of the adhesive layer is a removable adhesive material.
6 . The packaging method as claimed in claim 1 , wherein the wafer is a semiconductor wafer comprising a plurality of image sensing components or micro electro mechanical systems.
7 . The packaging method as claimed in claim 1 , wherein the pattern protective layer extends into the openings, and an interspace is formed between the pattern protective layer and the metal layer on the bottom of the corresponding opening.
8 . The packaging method as claimed in claim 1 , wherein the openings are filled with the pattern protective layer.
9 . The packaging method as claimed in claim 1 , wherein the process of forming insulating layer comprises the steps of:
depositing a layer of an insulating material; and
removing the insulating material to remove the portions of the insulating material corresponding to the openings so as to expose the bottoms of the openings.
10 . The packaging method as claimed in claim 1 , after the good dies of the dies are disposed on the spacer of each of the package units, further comprising:
forming a conductive bump on the exposed metal layer in each of the package units so as to electrically connect the good dies to the transparent substrate; and
sawing the transparent substrate so as to separate the package units.