iPhone 4 multitouch display

Randomly accurate rumor site Digitimes reports that, according to supply chain makers, Apple may have trouble meeting initial demand for the iPhone 5 thanks to a defect discovered in the production process for the touch panels made by Wintek.

A defect has presented in some iPhone 5 touch panels produced by Wintek which may affect the ability to meet initial shipment targets for the launch which is expected in October, according to iPhone supply chain makers.

The defect involves a "delayed bubble" effect which is harder to avoid during touch panel production, especially when the problem isn't found during the laminating process. If the problem isn't found before assembly, Wintek will have to scrap the panel altogether, essentially losing money and output during the production process.

Wintek currently accounts for some 20-25% of the overall production of touch panels Apple uses in the iPhone 5 with Chimei Innolux and TPK Holding pushing out the rest, so the problem shouldn't have a huge impact on volume out of the gate.

Apple running into production issues isn't completely unheard of, either, and Wintek also says to expect a quick remedy due to the fact that the lamination process in the iPhone 5 touch panels is the same as the iPhone 4.