  The footprint of inflation in the polarization pattern of the CMB is expected
at more than an order of magnitude below the limits of current polarization
measurements. Large receiver arrays are mandatory for achieving the required
sensitivity. We describe here the approach of the Q/U Imaging ExperimenT
(QUIET) which will use coherent detector arrays. Pseudo-correlation receivers
have been produced at 40 (90) GHz in small massproducable chip packages.
Deployment of the first arrays with 19 (91) receivers is taking place in 2008
in the Atacama Desert in Chile and an expansion to $\sim$1000 receivers is
foreseen for the future. The two frequencies and the selection of observing
regions with minimal foreground and good overlap with other upcoming
experiments will enable the detection of tensor to scalar ratios
$r\sim10^{-2}$.
