(March 19, 2008) San Jose, CA North American-based manufacturers of semiconductor equipment posted $1.23 billion in orders in February 2008 (three-month average basis) and a book-to-bill ratio of 0.93, according to SEMI’s February 2008 Book-to-Bill Report published today. A book-to-bill of 0.93 means that $93 worth of orders were received for every $100 of product billed for the month.