Semiconductor package with shielding member and method of manufacturing the same

This invention provides a semiconductor package, including a substrate, a plurality of semiconductor elements disposed on the substrate, at least one shielding member disposed between at least two of the semiconductor elements, and an encapsulant encapsulating the semiconductor elements and shielding members. Through the shielding member, electromagnetic interference caused among semiconductor elements can be prevented.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application claims under 35 U.S.C. §119(a) the benefit of Taiwanese Application No. 103117272, filed May 16, 2014, the entire contents of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to semiconductor packages, and, more particularly, to a semiconductor package and a method of manufacturing the same that will not be electromagnetically interfered by electronic elements in the semiconductor package.

2. Description of Related Art

With rapid advancement in the technology of electronic industry, semiconductor products have been developed in various types, in view of improving electrical performance. Hence several semiconductor types are incorporated with shielding effect to prevent electromagnetic interference (EMI).

A radio frequency (RF) module1prevents EMI. As shown inFIGS. 1A-1C, the radio frequency module1is formed by electrically connecting a plurality of radio frequency chips11a,11band non-radio frequency electronic elements11onto a substrate10, encapsulating the radio frequency chips11a,11band the non-radio frequency electronic elements11by an encapsulant13such as epoxy resin, and forming a metal thin film14on the encapsulant13. The radio frequency module1protects the radio frequency chips11a,11b, non-radio frequency electronic elements11and the substrate10from damages and contaminations from external moist or substances. Through the metal thin film14, the radio frequency chips11a,11bcan be protected from external EMI.

However, although the outer portion of the conventional radio frequency module1can be protected through the metal thin film14, it is not possible to eliminate electromagnetic interference caused among the radio frequency chips11a,11b, such that signal errors still exist.

Therefore, there is an urgent need to provide a semiconductor package wherein electromagnetic interference among the electronic elements formed in the radio frequency module can be eliminated.

SUMMARY OF THE INVENTION

In view of the foregoing problems, the present invention provides a semiconductor package, comprising: a substrate; a plurality of semiconductor elements disposed on the substrate; at least a shielding member disposed on the substrate and between at least two of the semiconductor elements; and an encapsulant formed on the substrate and encapsulating the semiconductor elements and the at least a shielding member.

The present invention further provides a method of manufacturing a semiconductor package, comprising: disposing on a substrate a plurality of semiconductor elements and at least a shielding member, allowing the at least a shielding member to be disposed between at least two of the semiconductor elements; and forming on the substrate an encapsulant that encapsulate the semiconductor elements and the shielding member.

In an embodiment, at least one of the semiconductor elements is a radio frequency chip, such as a Bluetooth chip and a Wi-Fi chip.

In an embodiment, the shielding member is exposed from the encapsulant and has a surface exposed from the encapsulant that is flush with a surface of the encapsulant.

In an embodiment, the shielding member is a board.

In an embodiment, a metal layer is further formed on the encapsulant, electrically connected with the shielding member, and made of copper, nickel, iron, aluminum, or stainless steel. The substrate has a circuit that is electrically connected with the metal layer.

In summary, in the semiconductor package and a method of manufacturing the same, the shielding member is disposed between at least two of the semiconductor elements, so as to prevent electromagnetic interference from occurrence between the at least two of the semiconductor elements.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The present invention is described in the following with specific embodiments, so that one skilled in the pertinent art can easily understand other advantages and effects of the present invention from the disclosure of the present invention.

It should be noted that all the drawings are not intended to limit the present invention. Various modification and variations can be made without departing from the spirit of the present invention. Further, terms, such as “top”, “one”, “bottom”, etc., are merely for illustrative purpose and should not be construed to limit the scope of the present invention.

Referring toFIGS. 2A to 2C, a method of manufacturing a semiconductor package2is provided. In an embodiment, the semiconductor package2is an electromagnetic wave generator such as a radio frequency (RF) module.

As illustrated inFIGS. 2A and 2A′, a substrate20having a top surface20aand a bottom surface20bis provided, and a plurality of semiconductor elements21and at least one shielding member22are disposed on the top surface20aof the substrate20. And, the shielding member22is disposed between at least two of the semiconductor elements21.

A circuit layer is formed on the top surface20aof the substrate20, and comprises a plurality of electrical contact pads200and at least one grounding part201. In an embodiment, varieties of substrate20are provided, and the circuit layer of the substrate20has at least one inner circuit202(as shown inFIG. 2C′), which can be electrically connected with the electrical contact pads200and the grounding part201selectively. There is no specific limitation for the structure of the substrate20.

In an embodiment, the semiconductor element21is a radio frequency chip, such as a Bluetooth chip and a wireless fidelity (Wi-Fi) chip. In an embodiment, the semiconductor element21is either a Bluetooth chip or a Wi-Fi chip, and electronic elements21′ that do not generate electromagnetic interference can be also disposed on the top surface20aof the substrate20.

In an embodiment, the semiconductor element21is a wire bonding chip that is electrically connected with the electrical contact pads200on the top surface20aof the substrate20via a plurality of corresponding bonding wires. In another embodiment, the semiconductor element21is a flip-chip that is electrically connected with the electrical contact pads200on the top surface20aof the substrate20via a plurality of solder balls210′.

In an embodiment, the shielding member22is a conductive board that is disposed on and electrically connected with the grounding part201, so as to divide the top surface20aof the substrate20into a plurality of placement rooms.

In an embodiment, the shielding member22can has an irregular or geometric shape. The semiconductor elements21are placed in the placement rooms, allowing the shielding member22to act as EMI shielding, so as to prevent electromagnetic interference between each of the semiconductor chips21, for instance, to prevent electromagnetic interference between the blue tooth chip and the Wi-Fi chip.

As shown inFIG. 2B, an encapsulant23is formed and covers the top surface20aof the substrate20, so as to encapsulate the semiconductor elements21, the electronic elements21′ and the shielding member22.

In an embodiment, the encapsulant23has a top surface23aand a bottom surface23aopposing and coupled to the top surface20a. The shielding member22is exposed from the top surface23aof the encapsulant23. In an embodiment, the shielding member22has a surface22aexposed from the encapsulant23that is flush with a top surface23aof the encapsulant23.

In an embodiment, the semiconductor elements21and the electronic elements21′ are not exposed from the top surface23aof the encapsulant23.

As shown inFIG. 2C, through a chemical plating method such as a sputtering method, a metal layer24is formed on the side surface20cof the substrate20, the exposed surface22aof the shielding member22, and the top surface23aand side surface23c, so as to complete the manufacturing of the semiconductor package2.

In an embodiment, the metal layer24is electrically connected with the shielding member22, allowing the metal layer24to act as a electromagnetic shielding to prevent electromagnetic interference, for instance to prevent signal interference between the blue tooth chip and Wi-Fi chip.

In an embodiment, the metal layer24is formed through coating and reflow methods.

In an embodiment, the metal layer24is made of copper (Cu), nickel (Ni), iron (Fe), aluminum (Al) or stainless steel (Sus).

In another embodiments, as shown inFIG. 2C′ the metal layer24is used to electrically connect the shielding member22with the inner circuit202of the substrate20(as the inner circuit is exposed from the side surface20cof the substrate20).

Accordingly, in the method of manufacturing the semiconductor package according to the present invention, the problem of electromagnetic interference caused between at least two of the semiconductor elements21can be prevented through the shielding member22dividing the space of the semiconductor elements21.

The present invention further provides a semiconductor package2, and2′, comprising: a substrate20, a plurality of semiconductor elements21, at least one shielding member22, and an encapsulant23.

The semiconductor package2is a radio frequency module.

The substrate20has an inner circuit202, a plurality of electrical contact pads200, and at least one grounding part201.

The semiconductor element21is disposed on the substrate20and electrically connected with the electrical contact pads200. In an embodiment, the semiconductor element21is a radio frequency chip, such as a Bluetooth chip and Wi-Fi chip.

The shielding member22is disposed on the substrate20and between at least two of the semiconductor elements21, and is electrically connected with the grounding part201.

The encapsulant23is formed on the substrate20and encapsulates the semiconductor elements21and the shielding member22. In an embodiment, the shielding member22is exposed from the encapsulant23.

In an embodiment, the semiconductor element2further comprises a metal layer24formed on the encapsulant23and electrically connected with the shielding member22. The metal layer is made of copper, nickel, iron, aluminum, or stainless steel. In an embodiment, the metal layer24can be selectively connected electrically to the inner circuit202.

In summary, the semiconductor package and the method of manufacturing the same provide a shielding member to prevent electromagnetic interference happened among each of the semiconductor element.