Company Filing History:
2 out of 962 
2 out of 806 
Years Active: 1996-2005
Title: Innovations of Wai Kin Chim
Introduction
Wai Kin Chim is a notable inventor based in Singapore, known for his contributions to the field of nonvolatile memory devices. He holds a total of 4 patents, showcasing his innovative approach to technology and memory storage solutions.
Latest Patents
One of his latest patents is a process to manufacture a nonvolatile MOS memory device. This invention involves devices with embedded silicon or germanium nanocrystals, which exhibit superior data-retention characteristics compared to conventional floating-gate devices. The challenges associated with ion implantation in their manufacture have been addressed by initially using rapid thermal oxidation to grow a high-quality layer of thin tunnel oxide. Following this, chemical vapor deposition is employed to deposit a germanium-doped oxide layer, and a capping oxide is added before the structure undergoes rapid thermal annealing to synthesize the germanium nanocrystals.
Another significant patent is for a nanocrystal flash memory device and its manufacturing method. This flash memory features a trilayer structure of rapid thermal oxide, germanium nanocrystals in silicon dioxide, and a sputtered silicon dioxide cap. The device has demonstrated memory hysteresis due to the germanium nanocrystals in the middle layer, which are synthesized through rapid thermal annealing of a co-sputtered germanium and silicon dioxide layer.
Career Highlights
Wai Kin Chim has worked with prominent organizations, including Chartered Semiconductor Manufacturing Ltd and the National University of Singapore. His experience in these institutions has significantly contributed to his expertise in semiconductor technology and memory devices.
Collaborations
He has collaborated with notable colleagues such as Wee Kiong Choi and Vivian Ng, further enhancing his innovative work in the field.
Conclusion
Wai Kin Chim's contributions to the development of nonvolatile memory devices highlight his role as a leading inventor in Singapore. His patents reflect a commitment to advancing technology and improving data retention in memory devices.