Frederick A Ho

US Patent:

20080302233, Dec 11, 2008

Filed:

Jan 3, 2008

Appl. No.:

12/072804

Inventors:

Xiao-Yu Ding - Union City CA, US
Frederick Ho - Union City CA, US
Helen Ho - Union City CA, US
Jacquelin Ho - Union City CA, US
Sharon Liu - Hayward CA, US
Pu Zhang - Beijing, CN

International Classification:

G10H 7/00

US Classification:

84609

Abstract:

Digital music systems, apparatus and techniques based on digitized music data and information to allow for a wide range of applications including digital music practice companion systems.

US Patent:

20070125661, Jun 7, 2007

Filed:

Feb 23, 2005

Appl. No.:

10/590460

Inventors:

Hui Wang - Fremont CA, US
Afnan Muhammed - Fremont CA, US
Jian Wang - Fremont CA, US
Felix Gutman - San Jose CA, US
Frederick Ho - San Jose CA, US

Assignee:

ACM RESEARCH INC. - FREMONT CALIFORNIA CA

International Classification:

B23H 3/00

US Classification:

205651000

Abstract:

A metal layer formed on a wafer, the wafer having a center portion and an edge portion, is electropolished by aligning a nozzle and the wafer to position the nozzle adjacent to the center portion of the wafer. The wafer is rotated. As the wafer is rotated, a stream of electrolyte is applied from the nozzle onto a portion of the metal layer adjacent to the center portion of the wafer to begin to electropolish the portion of the metal layer with a triangular polishing profile to initially expose an underlying layer underneath the metal layer at a point.