Cuong Tien Vu

US Patent:

58909516, Apr 6, 1999

Filed:

Apr 15, 1996

Appl. No.:

8/632550

Inventors:

Cuong van Vu - San Jose CA

Assignee:

LSI Logic Corporation - Milpitas CA

International Classification:

B24B 53007

US Classification:

451 56

Abstract:

A utility wafer is used to mechanically condition and chemically stabilize a polishing pad and ready the pad for chemical-mechanical polishing of semiconductor production wafers. The utility wafer is fabricated from a high-purity ceramic material, such as quartz (SiO. sub. 2), or a high-purity metal, such as tungsten. Because there are no dielectric coatings to be maintained on the utility wafer, the utility wafer can be used much longer and at greatly reduced cost than other types of utility wafers. In one embodiment, a light reflective coating may be applied to one side of a ceramic utility wafer to ensure process machinery will detect the presence of the wafer. In another embodiment, a silicon wafer is bonded to the utility wafer to provide structural support to the utility wafer as the utility wafer is thinned by the abrasive action of the polishing pad.

US Patent:

20230043018, Feb 9, 2023

Filed:

Apr 6, 2022

Appl. No.:

17/714220

Inventors:

- Palo Alto CA, US
Shuhan Liu - San Jose CA, US
Hsiangyin Cheng - Taipei City, TW
Meng-Jung Chuang - Taipei City, TW
Liem Hieu Dinh Vo - San Jose CA, US
Richard Chang - Los Altos CA, US
Ming-Tsung Su - Taipei City, TW
Hao-Hsiu Huang - Taipei City, TW
Jeffrey ChiFai Liew - Millbrae CA, US
Zhicheng Qiu - Cupertino CA, US
Cuong Vu - Union City CA, US
Fahri Diner - Zurich, CH
Miroslav Samardzija - Mountain View CA, US
Shu Chun Shen - Taipei City, TW

International Classification:

H04W 4/029
H04W 52/02
H04W 4/38
G08B 25/01
A61B 5/00
A61B 5/11

Abstract:

A smart ring includes a battery, memory, processing circuitry, a plurality of sensors, a plurality of antennas, and a battery, each coupled to one another and all enclosed in a casing, wherein the processing circuitry is configured to conserve the battery by any of sending data to the cloud service when an application is open on the user device, sending data to the cloud service when a threshold is crossed, waking up processing or communicating when there is a change in motion detected by the accelerometer.