EETimes reports that 40nm yields at TSMC, the world’s largest independent foundry, have not dropped as previously reported.

A representative from the Taiwan Semiconductor Manufacturing Corporation said that the company’s 40nm growing pains were largely resolved: ”The 40-nm yield didn’t drop as reported. As a matter of fact, yield on the 40-nm process remained flat. TSMC is confident that the 40-nm yield will improve at the beginning of next year.”

The latest claims come in response to allegations that the foundry’s 40nm yield rates had fallen by a third to 40%, hampering the introduction of NVIDIA’s Fermi and the availability of AMD’s Evergreen cores.

While TSMC does not deny that it is still experiencing troubles with the difficult new process, the firm is keen to stress that they are largely logistical in nature. TSMC maintains that 40nm throughput is on an upswing, and will continue healthily throughout 2010.