Chiu Y Tse

US Patent:

20090137439, May 28, 2009

Filed:

Sep 29, 2008

Appl. No.:

12/239957

Inventors:

Xuan-Dung Thi DINH - San Jose CA, US
Chiu Tse - San Francisco CA, US
Chris Reid - Hamilton, GB

International Classification:

C11D 9/02

US Classification:

510170, 510109

Abstract:

The present invention generally relates to compositions and methods for cleaning by contacting a hard disk data storage device, an inkjet printer cartridge head, or the like having residue thereon, particularly organometallic or metal oxide residue, with a cleaning composition of the present invention for a time and at a temperature sufficient to remove the residue. Stirring, agitation, circulation, sonication or other techniques as are known in the art optionally may be used. The hard disk data storage device, an inkjet printer cartridge head, or the like is generally immersed in the cleaning composition. The time and temperature can be determined based on the particular material being removed from a substrate. Generally, the temperature is in the range of from about ambient or room temperature to about 100 C. and the contact time is from about 1 to about 60 minutes. The preferred temperature and time of contact for this invention is about 25 to about 45 C. for about 2 to about 60 minutes. Generally the hard disk data storage device, an inkjet printer cartridge head, or the like may optionally be rinsed after using the composition or the method may be rinse-free, as such rinse is unnecessary with AlO. Preferred rinse solutions include isopropanol and/or deionized water.