Bii-Cheng Chang

Title: Innovations of Bii-Cheng Chang

Introduction

Bii-Cheng Chang is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of semiconductor technology, holding a total of 2 patents. His work focuses on advancements in wafer-level packaging and imaging sensors.

Latest Patents

Bii-Cheng Chang's latest patents include a wafer-level package and a mask for fabricating the same. This exemplary wafer-level package comprises a semiconductor wafer with a plurality of semiconductor chips of perfect polygonal shapes. A circuit-free area is defined over the semiconductor wafer to electrically isolate the semiconductor chips. A dam structure is substantially formed over the circuit-free area, wherein a portion of the dam structure formed around an edge of the semiconductor wafer is created with a plurality of via holes. Additionally, a transparent substrate is formed over the semiconductor wafer, defining a plurality of cavities between the semiconductor chips and the transparent substrate, with the transparent substrate supported by the dam structure.

Another significant patent involves an imaging sensor having microlenses of different radii of curvature. This invention provides an image sensor that comprises improved microlenses to address different optical requirements for oblique incident light or various components of light. In one embodiment, the image sensor includes at least two microlenses with different radii of curvature. In another embodiment, it features at least one asymmetrical microlens.

Career Highlights

Bii-Cheng Chang is currently employed at Visera Technologies Company Limited, where he continues to innovate in the semiconductor industry. His work has been instrumental in enhancing the performance and efficiency of semiconductor devices.

Collaborations

Bii-Cheng Chang has collaborated with notable colleagues, including Fu-Tien Weng and Yung-Shun Liao, who contribute to the innovative environment at Visera Technologies.

Conclusion

Bii-Cheng Chang's contributions to semiconductor technology through his patents and work at Visera Technologies highlight his role as a leading inventor in the field. His innovations continue to shape the future of imaging sensors and wafer-level packaging.