Location History:
- Sunnyvale, CA (US) (1999)
- San Jose, CA (US) (2001 - 2004)
Company Filing History:
3 out of 19 
1 out of 832,843 Years Active: 1999-2004
Title: Chao-I Chang: Innovator in Flash Memory Technology
Introduction
Chao-I Chang is a notable inventor based in San Jose, CA, who has made significant contributions to the field of flash memory technology. With a total of 4 patents to his name, Chang has developed innovative solutions that enhance the performance and reliability of memory controllers.
Latest Patents
One of his latest patents is a flash memory controller with updateable microcode. This invention discloses a controller that loads microcode and data into its program and data memory from a flash memory array upon power-up. If an error occurs during the download or if the microcode is absent in the flash memory array, the controller can retrieve the necessary information from the host computer. This design includes an initial code download to evaluate the configuration of the controller and the flash memory, allowing for tailored microcode to be stored in the flash memory. Additionally, a protection circuit is incorporated to prevent accidental erasure of the microcode, and an interleaved data structure is utilized to minimize wait times during read and write operations.
Another significant invention by Chang is the autodisk controller. This device controller operates in monitor mode, capable of tracking the address of incoming data blocks. When a target address is reached, it switches to buffer mode, where it monitors parameters regarding incoming data blocks and reports any status or errors to a microprocessor. This innovation alleviates the microprocessor from the burden of monitoring incoming data blocks and performing error checks, thus improving overall efficiency.
Career Highlights
Chao-I Chang has worked with Integrated Memory Logic, Inc., where he has further honed his skills in memory technology. His work has been instrumental in advancing the capabilities of memory controllers, making them more efficient and reliable.
Collaborations
Throughout his career, Chang has collaborated with notable professionals in the field, including Cheng-Chi Fang and Ji Yun Zhang. These collaborations have contributed to the development of his innovative technologies.
Conclusion
Chao-I Chang's contributions to flash memory technology through his patents demonstrate his commitment to innovation and excellence in the field. His work continues to influence the development of advanced memory solutions, showcasing the importance of inventors in driving technological progress.