Semiconductor package structure with microstrip antennan

A semiconductor package structure with a microstrip antenna comprises a packaging substrate, a chip and a microstrip radiation device. The packaging substrate has an upper surface having a packaging area on which the chip is disposed and a peripheral area on which the microstrip radiation device is disposed for transceiving a signal of the chip.

BACKGROUND OF THE INVENTION

1. Field of Invention

This invention relates to a semiconductor package. More particularly, the present invention is related to a semiconductor package with a microstrip antenna formed therein.

2. Related Art

A well-known wireless electronic application usually contains digital, analog and radio frequency devices and circuits and such circuit or devices are usually integrated in a chip. On the basis, such chip, antenna and passive components are then integrated in a printed circuit board. However, as mentioned above, only the passive components, digital, analog and radio frequency circuits are integrated in an assembly package accompanying the development of the semiconductor technologies, such as the improvements and the developments of multi-chips module package, chip scale package, wafer level packages and flip chip technology, but the antenna is formed in or disposed on printed circuits boards rather than integrated in an assembly package. The disadvantage is that it is not only to be able to integrate an antenna within a package module but also limit to the layout of another circuits in the printed circuit board.

Therefore, providing another semiconductor package with antenna devices formed therein to solve the mentioned-above disadvantages is the most important task in this invention.

SUMMARY OF THE INVENTION

In view of the above-mentioned problems, this invention is to provide a semiconductor package with microstrip antenna devices formed therein so as not to limit the layout of the circuits in a printed circuit board.

In view of the above-mentioned problems, this invention is to provide a semiconductor package with microstrip antenna devices formed therein so as to optimize the radiation power and the pattern field of the antenna.

In view of the above-mentioned problems, this invention is to provide a semiconductor package with microstrip antenna devices formed therein to optimize the protection and design of the electromagnetic radiation and electromagnetic compliance (EMC).

To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, the invention specifically provides a semiconductor package with a microstrip antenna formed therein. The package mainly comprises a packaging substrate, a chip and a microstrip radiation device. Therein, the packaging substrate has a packaging area and a peripheral area surrounding the packaging area; the microstrip radiation device is formed in the peripheral area and utilized for receiving and transmitting wireless signals of the chip.

DETAILED DESCRIPTION OF THE INVENTION

The semiconductor package according to the preferred embodiments of this invention will be described herein below with reference to the accompanying drawings, wherein the same reference numbers are used in the drawings and the description to refer to the same or like parts.

As shown inFIGS. 1 and 2, it illustrates a first embodiment of this invention. The semiconductor package mainly comprises a carrier10, such as a packaging substrate. The packaging substrate10has a first circuit layer11, a second circuit layer12, a third circuit layer13and a fourth circuit layer14from top to bottom. There is further a first dielectric layer15formed between the first circuit layer11and the second circuit layer12; there are further a second dielectric layer16and a third dielectric layer17formed between the second circuit layer12and the third circuit layer13, and the third circuit layer13and the fourth circuit layer14respectively.

As mentioned above, the packaging substrate10has an upper surface18which has a packaging area19and a peripheral area20surrounding the packaging area19. Therein, the packaging area19has a chip22formed thereon and an encapsulation (not shown) is utilized to encapsulate the chip22. As shown inFIG. 2, the packing substrate10has a plurality of through holes24formed therein for electrically connecting the upper surface18and the lower surface26. To be noted, the upper surface18has a plurality of first contacts30formed thereon and the lower surface26has a plurality of second contacts32formed thereon; and the first contacts30and the second contacts32connect with each other via the though holes24and24aand electrically conductive circuits. Besides, the second contacts32are electrically connected to a plurality of bumps34so as to have the chip22electrically connected to external devices (not shown).

Referring toFIGS. 2 and 3, which illustrates the explosive diagram showing a portion of the peripheral area20. Therein, there is a microstrip radiation device36formed in the peripheral area20of the packaging substrate10wherein the microstrip radiation device36has a signal feed-in point36afor receiving or transmitting (transceiving) a wireless signal. Furthermore, the second circuit layer12has a ground plane38located under the microstrip radiation device36and an opening40of the ground plane38corresponds the feed-in point36aand is utilized to have the wireless signal passed through. In addition, the third circuit layer13has a signal feed-in line42for transmitting the wireless signal of the chip22and the signal feed-in line42is electrically connected to the chip22through a signal transmitting line46, a though hole48aand bonding wire28. Moreover, the third circuit layer13is coupled to the microstrip radiation device36through the opening40of the ground plane38.

To be noted and comprehensible, the shapes of the opening40or the microstrip radiation device36in this embodiment can be easily modified to be applicable to different types upon the working frequency, the match of the impedance of the anneta.

In addition, the third circuit layer13is able to be electrically connected to the signal feed-in point36aof the microstrip radiation device36via a through hole52passing through the opening40of the ground plane38as shown inFIG. 4.

As shown above, the feed-in line42is able to be located in the same circuit layer with the ground plane38and then electrically connected to the feed-in point36avia a through hole. Referring toFIGS. 5 and 6, they illustrate the feed-in line42is disposed in the same circuit layer with the ground plane38. Therein, the ground plane38has an opening54and the opening54is large enough to accommodate the feed-in line42, and the feed-in line42is electrically connected to the feed-in point36aof the microstrip radiation device36via a through hole56so as to transmit the signal of the chip22to the microstrip radiation device36.

This invention is characterized in that there is a microstrip radiation device is formed in a peripheral area of a packaging substrate and the multi circuit layers located in the peripheral area or the area under the peripheral area are employed as feed-in structures to a form package module with anneta formed therein.

Although the invention has been described in considerable detail with reference to certain preferred embodiments, it will be appreciated and understood that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.