Industry sources report that the December PCB book-to-bill ratio for North America was 1.01, the ninth straight month that the ratio was 1.00 or higher.

A ratio of 1.01 means that for every $100 of boards shipped in December, suppliers got $101 in new orders. A ratio of 1.00 or higher indicates that PCB demand is higher than supply, which forcasts increased sales growth in the coming months.

Sources report that Rigid PCB bookings were up 6.8%, with a book-to-bill ratio at 1.01, while Flex Circuit shipments were up 1% in December, with a ratio at an even 1.0.