North America-based semiconductor equipment manufacturers posted $1.18bn in orders in August 2011, according to the August Book-to-Bill Report by SEMI, a global industry association serving the manufacturing supply chain for the micro- and nano-electronics industries.

The bookings figure is 8.8% less than the final July 2011 level of $1.3bn, and is 34.8% below the $1.82bn in orders posted in August 2010.

The three-month average of worldwide billings in August 2011 was $1.48bn.

The billings figure is 3% less than the final July 2011 level of $1.52bn, and is 5.1% less than the August 2010 billings level of $1.55bn.

SEMI president and CEO Stanley Myers said weaker DRAM demand, foundry spending reductions and near-term uncertainties about electronics demand are reflected in declining sales trends for new semiconductor manufacturing equipment.

"Consequently, the SEMI 3-month average billings are at levels last seen in June of 2010," Myers said.