Zifeng Li

Title: Zifeng Li: Innovator in Chemical Mechanical Planarization

Introduction

Zifeng Li is a notable inventor based in Newark, DE (US). He has made significant contributions to the field of semiconductor materials, particularly in the area of chemical mechanical planarization (CMP) polishing compositions.

Latest Patents

Zifeng Li holds a patent for an invention titled "Aqueous silica slurry and amine carboxylic acid compositions for use in shallow trench isolation and methods of using them." This patent describes aqueous CMP polishing compositions that include an abrasive made from elongated, bent, or nodular colloidal silica particles containing a cationic nitrogen atom. The compositions also incorporate one or more amine carboxylic acids with an isoelectric point below 5, which enhances the polishing process for semiconductor substrates. The pH of these compositions ranges from 2 to 5, allowing for effective polishing at a high oxide:nitride removal rate ratio.

Career Highlights

Zifeng Li is currently employed at Rohm and Haas Electronic Materials CMP Holdings, Inc. His work focuses on developing innovative materials and methods that improve the efficiency and effectiveness of semiconductor manufacturing processes.

Collaborations

Zifeng Li collaborates with various professionals in his field, including his coworker Naresh Kumar Penta. Their combined expertise contributes to advancements in CMP technology and materials.

Conclusion

Zifeng Li's contributions to the field of semiconductor materials through his innovative patent and work at Rohm and Haas Electronic Materials CMP Holdings, Inc. highlight his role as a key inventor in the industry. His work continues to influence the development of efficient polishing compositions for semiconductor substrates.