(April 24, 2008) San Jose, CA — After a brief surge in February, when the book-to-bill ratio for North American semiconductor equipment reached .92, it has slipped back to 0.89 for March 2008, the same average as January, 2008. On the bright side, total billings for March — 1.29B — was only 1% lower than February’s 1.31B, and slightly more than January’s billings of 1.28B.