Cheng-Chih Kung

Title: Cheng-Chih Kung: Innovator in Semiconductor Technology

Introduction

Cheng-Chih Kung is a prominent inventor based in Hsin-Chu, Taiwan. He has made significant contributions to the field of semiconductor technology, holding a total of 7 patents. His innovative work has advanced the development of various electronic components, particularly in the realm of memory storage.

Latest Patents

One of Cheng-Chih Kung's latest patents is the "Variable work function transistor high density mask ROM." This invention involves a mask ROM that stores information by selecting the work function of the gates of each FET in an array of FETs. The design incorporates polysilicon gates that are doped N-type and P-type, creating FETs with different threshold voltages. The ROM features a parallel array of buried N bit lines formed in the substrate, with a gate oxide layer and a layer of polysilicon deposited on top. The polysilicon is doped P-type, and an encoding mask is used to expose regions for low threshold voltage gates. The process includes doping with arsenic or phosphorus, followed by the deposition of conductive materials to form word lines that serve as gates for the FETs.

Another notable patent is the "Method for removing pad nodules." This method addresses the issue of pad nodules formed on metal pads, specifically those made from aluminum or aluminum-copper alloys. The process involves dipping the wafer into deionized water to remove the pad nodules, followed by spin-drying and coating with an alkaloid developer for further removal. The final steps include removing the developer and baking the wafer to complete the process.

Career Highlights

Cheng-Chih Kung has worked with several notable companies in the semiconductor industry, including United Microelectronics Corporation and United Silicon Incorporated. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies.

Collaborations

Throughout his career, Cheng-Chih Kung has collaborated with esteemed colleagues such as Shing-Ren Sheu and Peter Chou. These partnerships have fostered innovation and have been instrumental in the development of new technologies.

Conclusion

Cheng-Chih Kung's contributions to semiconductor technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in electronic components and memory storage solutions.