Chemical compositions

Details Chemical compositions Chemical compositions

1999-10-07

2001-10-02

Seidleck, James J. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S366000, C524S463000, C510S188000, C510S202000, C510S411000, C510S412000

Reexamination Certificate

active

06297308

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to chemical compositions that can be useful for drying substrates, in particular to compositions comprising a fluorinated solvent and a fluoroalkyl-substituted surfactant.
BACKGROUND
Removing water from processed articles or articles of manufacture is a manufacturing step in the production of many commercial product components and commercial products. Known methods for removing water from substrates include evaporation, centrifugation, absorption, and solvent drying, with each of these methods having certain advantages and disadvantages.
Solvent drying by water displacement has been a preferred method for drying electronic components, magnetic media, and associated products such as disk drive heads. A variety of fluorinated solvents have been used in solvent drying and/or cleaning processes including, e.g., chlorofluorocarbons (CFCs), hydrofluorocarbons (HFCs), hydrochlorofluorocarbons (HCFCs), and perfluorocarbon (PFCs).
Some articles of manufacture require or benefit from drying methods that can provide a surface that is spot-free, e.g., essentially free of residual water and other residues. For instance, semiconducting wafers can require an essentially impurity-free surface for later working. As such, the method used to dry such products can preferably permit drying to a surface that is “spot-free.”
There exists a need for compositions which can be useful in drying methods, especially to meet the needs of spot-free drying applications.


REFERENCES:
patent: 2500388 (1950-03-01), Simons
patent: 2519983 (1950-08-01), Simons
patent: 2594272 (1952-04-01), Kauck et al.
patent: 2616927 (1952-11-01), Kauck et al.
patent: 2915554 (1959-12-01), Ahlbrecht et al.
patent: 3450755 (1969-06-01), Ahlbrecht
patent: 3900372 (1975-08-01), Childs et al.
patent: 3903012 (1975-09-01), Brandreth
patent: 4289892 (1981-09-01), Soch
patent: 4491531 (1985-01-01), Bargigia et al.
patent: 4788339 (1988-11-01), Moore et al.
patent: 5089152 (1992-02-01), Flynn et al.
patent: 5125978 (1992-06-01), Flynn et al.
patent: 5658962 (1997-08-01), Moore et al.
patent: 5750797 (1998-05-01), Vitcak et al.
patent: 5925611 (1999-07-01), Flynn et al.
patent: 1294949 (1969-05-01), None
patent: 2287432 (1976-05-01), None
patent: WO 93 22868 (1993-11-01), None
Encyclopedia of Chemical Technology, Kirk-Othmer, Fourth Ed., vol. 11, pp. 499-515, (1994), John Wiley & Sons.

Affiliated with

Also associated with

Rating

Chemical compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chemical compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2607124