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the Submicronic Assembly]
Interferometric Vision
Both the the interconnection and the chips are aligned with respect to
the image of a reference mirror.
When aligned in white light the chip is maintained in the same fringe
as the network.
When fringes are found in white light (in this case around 8 fringes
are visible for each coincidence of specular interfaces), the piece to
be positioned is tilted until one fringe covers an whole specular interface.
fringes.gif (192 kB)
Few microns near the coincidence of the reference mirror image
with the piece to be positioned beautiful Newtons colors are appearing
along the interference area.
fringe.gif (161 kB)