Digitimes reports that iPhone touch panel supplier Wintek has apparently experienced some production issues that have caused minor defects in some of the panels being produced for the next-generation "iPhone 5".
The defect, "delayed bubble", is difficult to avoid during panel production, particularly when the defect is not detected during the process of laminating touch panels, and only later found during assembly, the sources said. Since the manufacturing process of touch panels used in iPhone 5 is of the same as that for iPhone 4, Wintek is expected to remedy the defect quickly, the sources indicated.
For its part, Wintek claims that all of its products are being delivered to customers on schedule.
It is unclear just how big of an effect the issue might have on iPhone supplies, as no estimate of the percentage of Wintek's panel production affected by the defect is given in the report, and Wintek is only responsible for 20-25% of total iPhone touch panel production. TPK is Apple's primary touch panel supplier, with Chimei Innolux also contributing some production capacity.
Also unclear is just what device is being addressed in the report, as it is still uncertain whether Apple be introducing both a redesigned iPhone 5 and an "iPhone 4S" that is nearly identical in appearance to the iPhone 4. Several reports from Apple's supply chain have suggested that there is no sign of a redesigned iPhone 5 at this time and that the iPhone 4S may be the only release for Apple next month.