Wafer-level package with enhanced performance

#The present disclosure relates to a wafer-level package and a process for making the same, and more particularly to a wafer-level package with enhanced electrical and rigidity performance, and a packaging process to enhance electrical and rigidity performance of a wafer-level package.

#The wide utilization of cellular and wireless devices drives the rapid development of radio frequency (RF) technologies. The substrates on which RF devices are fabricated play an important role in achieving high level performance in the RF technologies. Fabrications of the RF devices on conventional silicon substrates may benefit from low cost of silicon materials, a large scale capacity of wafer production, well-established semiconductor design tools, and well-established semiconductor manufacturing techniques.

#Despite the benefits of using conventional silicon substrates for RF device fabrication, it is well known in the industry that the conventional silicon substrates may have two undesirable properties for the RF devices: harmonic distortion and low resistivity values. Harmonic distortion is a critical impediment to achieve high level linearity in the RF devices built over silicon substrates. In addition, the low resistivity encountered in the silicon substrates may degrade quality factors (Q) at high frequencies of microelectromechanical systems (MEMS) or other passive components.

#The accompanying drawing figures incorporated in and forming a part of this specification illustrate several aspects of the disclosure, and together with the description serve to explain the principles of the disclosure.

#FIG. 1 shows an exemplary wafer-level package according to one embodiment of the present disclosure.

#FIGS. 2-13 provide exemplary steps that illustrate a process to fabricate the exemplary wafer-level package shown in FIG. 1.

#It will be understood that for clarity of illustration, FIGS. 1-13 may not be drawn to scale.

#The embodiments set forth below represent the necessary information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.

#It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.