CAFC Update(4)
■2004.1.19■
CFMT, INC. and CFM TECHNOLOGIES, INC., |
1.概要 2.背景 |
以 上 |
【関連事項】 判決の全文は下記のジョージタウン大学Law Centerのライブラリから閲覧することができます。 http://www.ll.georgetown.edu/federal/judicial/fed/opinions/01opinions/01-1452.html 【注釈】 *1 CFMT, Inc. v. YieldUp Int’l Corp., 92 F. Supp. 2d 359 (D. Del. 2000) *2 CFMT, Inc. v. YieldUp Int’l Corp., 144 F. Supp. 2d 305 (D. Del. 2001) *3 532特許のクレーム1及びクレーム55 1. An enclosed, full flow method for the cleaning of semiconductor wafers comprising positioning
said wafers in a vessel, closing said
vessel
to the environment, and flowing process
fluids
sequentially and continuously past
said wafers
in said vessel, including the steps
of (a) contacting said wafers with at least one
cleaning fluid to remove contaminants
from
said wafers; (b) removing said cleaning fluid from said wafers
with a rinsing fluid; and (c) removing said rinsing fluid from said wafers
with a drying fluid; whereby the processing does not requirement
[sic] movement or operator handling
of said
wafers between said steps; and maintaining the vessel containing said wafers
hydraulically full during each process
step. 55. An enclosed, full flow method for the treatment of semiconductor wafers comprising positioning
said wafers in a vessel, closing said
vessel
to the environment, and flowing process
fluids
in sequential steps continuously past
said
wafers in said vessel, including the
step
of reacting the surface of said wafers
with
at least one chemical reagent, whereby
the
processing does not require movement
or handling
of said wafers between said steps and
maintaining
the vessel containing said wafers hydraulically
full during each process step. *4 123特許のクレーム1及びクレーム20 1. Apparatus for wet processing of semiconductor wafers comprising: (a) vessel means for supporting said wafers in
a closed circulation process stream
wherein
process fluids may sequentially flow
past
said wafers, said vessel being hydraulically
full with process fluid when said process
fluids flow past said wafers; (b) means for supplying at least one cleaning
fluid to said process stream for removing
contaminants from said wafers, and
means
for withdrawing said cleaning fluid
from
said process stream; (c) means for supplying a rinsing fluid to said
process stream for removing other fluids
from said wafers, means for minimizing
gas/liquid
interfaces in said rinsing fluid and
means
for withdrawing said rinsing fluid
from said
process stream; and (d) means for supplying a drying fluid to said
process stream for removing other fluids
from said wafers and means for withdrawing
said drying fluid from said process
stream. 20. Apparatus for wet processing of semiconductor wafers comprising: (a) vessel means for supporting said wafers in
a closed circulation process stream
wherein
process fluids may sequentially flow
past
said wafers and (b) means for supplying at least one chemical
reagent to said process stream for
reacting
with portions of said wafers, said
process
stream being positioned within said
vessel
means such that said vessel means is
hydraulically
full with process fluid. (emphases added) *5 Christianson v. Colt Indus. Operating Corp.,
822 F.2d 1544, 1562 (Fed. Cir. 1987). 1. reduction of contamination by airborne particles; 2. reduction of contamination from human or robotic operators: 3. good heat transfer between process chemicals
and wafers; 4. uniform exposure of the wafers to reagent
chemicals at uniform concentrations
for precisely
limited periods of time; 5. reduction of hazards to personnel by minimizing
exposure to chemicals; 6. minimizing stagnant conditions and avoiding
filming effects; and 7. providing a mechanically simple process and
apparatus which allow for easy operation
and cleaning while minimizing the possibility
[sic] contaminant build-ups in the
apparatus. Still further advantages are provided by
preferred embodiments of the present
invention,
including: 1. the reduction of quantities of hazardous
process fluids used due to recirculation
of the process fluids; 2. the ability to provide quality drying fluids
to displace the residual rinsing fluid; 3. the ability to provide a high-quality rinsing
fluid having both low suspended solids
and
low dissolved impurities; and 4. the ability to provide high flow rates of
rinsing fluid to rinse the wafers and
precisely
dilute concentrated chemical reagents. The net effect of all the above advantages
is to reduce the risk of introducing
contaminants while simultaneously improving the yield
of non-defective semiconductor devices. |