In October 2012 North American semiconductor equipment manufacturer orders shipped is estimated to be (Book-to-Billratio) 0.75, decline for the consecutive seven months and hit the lowest in the past year, but on the long-term observation of the trend close to 0.7 means to fall to the bottom, legal person is expected in the first quarter of next year to the end of the second start of the season is the reversal point, B / Bratio will be back to 1. The legal person pointed out that the long-term observation, B / Bratio close to 0.7 is about to fall to the bottom, the next 1 to 2 quarters the industry will begin to reverse the upward; the present 0.75 although has not significant rebound signals ,it is estimated according to past experience it will fall in the first quarter of next year to the second quarter of next year. Legal assessment estimates B / Bratio is expected in the first quarter to the second quarter of next year, bottoming out ,in the second quarter of next year, is expected to return to more than 1.