Appeal No. 96-1805
Application 08/200,432
that the space between the wafers be filled with a gas of
viscosity less than that of air prior to the start of sticking of
the wafers, it does not also require the reduced pressure
environment. However, as expressed above with regard to the
other independent claims, it is our view that the combined
teachings of the references fail to establish a prima facie case
of obviousness with regard to the requirement of filling the
space between the wafers with a gas having a lower viscosity than
air, on its own. This being the case, we will not sustain the
rejection of claim 4 or of dependent claim 5.
The teachings of Haisma, cited against some of the dependent
claims, also have been considered, but do not overcome the
deficiencies discussed above.
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