SEMI book-to-bill ratio slips to 0.97 in May

SAN JOSE, Calif. – June 16, 2011 – North America-based manufacturers of semiconductor equipment posted $1.62 billion in orders in May 2011 (three-month average basis) and a book-to-bill ratio of 0.97, according to the May Book-to-Bill Report published today by SEMI. A book-to-bill of 0.97 means that $97 worth of orders were received for every $100 of product billed for the month.

The three-month average of worldwide bookings in May 2011 was $1.62 billion. The bookings figure is 1.1 percent more than the final April 2011 level of $1.60 billion, and is 6.2 percent above the $1.53 billion in orders posted in May 2010.

The three-month average of worldwide billings in May 2011 was $1.67 billion. The billings figure is 2.0 percent more than the final April 2011 level of $1.64 billion, and is 24.0 percent more than the May 2010 billings level of $1.34 billion.

“Three-month average bookings improved slightly in May and both bookings and billings are higher than one year ago,” said Stanley T. Myers, president and CEO of SEMI. “As we approach the half-year point, the data substantiates global industry expectations for double-digit growth this year.”

The SEMI book-to-bill is a ratio of three-month moving averages of worldwide bookings and billings for North American-based semiconductor equipment manufacturers. Billings and bookings figures are in millions of U.S. dollars.












December 2010




January 2011




February 2011




March 2011




April 2011 (final)




May 2011 (prelim)




Source: SEMI June 2011

The data contained in this release were compiled by David Powell, Inc., an independent financial services firm, without audit, from data submitted directly by the participants. SEMI and David Powell, Inc. assume no responsibility for the accuracy of the underlying data.

The data are contained in a monthly Book-to-Bill Report published by SEMI. The report tracks billings and bookings worldwide of North American-headquartered manufacturers of equipment used to manufacture semiconductor devices, not billings and bookings of the chips themselves. The Book-to-Bill report is one of three reports included with the Equipment Market Data Subscription (EMDS).

SEMI is the global industry association serving the manufacturing supply chains for the microelectronic, display and photovoltaic industries. SEMI member companies are the engine of the future, enabling smarter, faster and more economical products that improve our lives. Since 1970, SEMI has been committed to helping members grow more profitably, create new markets and meet common industry challenges. SEMI maintains offices in Beijing, Bengaluru, Berlin, Brussels, Grenoble, Hsinchu, Moscow, San Jose, Seoul, Shanghai, Singapore, Tokyo, and Washington, D.C. For more information, visit

Association Contacts

Dan Tracy/SEMI
Tel: 1.408.943.7987
E-mail: Email Contact

Deborah Geiger/SEMI
Tel: 1.408.943.7988
E-mail: Email Contact

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