Appeal 2007-1054
Application 10/640,067
thereon prior to forming an orifice layer (318) having a plurality of firing
nozzles (326) on the first substrate surface (303). (Id. 7 and 8.)
The Prior Art Relied upon
4. Baughman teaches a system for manufacturing an ink fill slot in a
thermal ink-jet print head by utilizing laser machining. (Col. 6, lines 59-63.)
5. Baughman also suggests that conventional photolithographic
techniques can be used in conjunction with laser machining to remove
excess substrate material from desired areas. (Col. 2, ll. 28-31.) 2
6. As depicted in Figures 4A- 4C, Baughman teaches a substrate (12)
including a first substrate surface (12a) having formed therein an ink fill slot
(18) by laser machining. (Col. 5, ll. 1-6; col. 6, ll. 59-63.) These figures
also depict that the ink fill slot is positioned between the first substrate
surface (12a) and a second substrate surface (12b).
7. As depicted in Figure 4D, Baughman teaches a plurality of nozzles
(20) containing orifices formed in the first substrate surface (12a)
subsequently to forming the ink fill slot on the substrate and after a shelf
length structure had been completed. (Col. 6, ll. 26-28.)
2 Baughman at column 2, lines 24 through 31 states:2
“ In accordance with the invention, an ink fill slot can be precisely
manufactured in a substrate utilizing photolithographic techniques
with chemical etching, plasma etching, or a combination thereof.
These methods may be used in conjunction with laser machining,
mechanical abrasion, electromechanical machining, or conventional
etch to remove additional substrate material in desired areas.”
(Emphasis added.). See Also, column 5, lines 1-8.
5
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