Reuters is reporting that Apple may be having difficulty prepping a sufficient number of screens for the next iPhone. Apple is expected to unveil the new line at media event on September 9. The problem, says Reuters, involves a "key" component that's disrupting the production of the line's new screens, rumored to be larger than the iPhone 5's current four inches, and possibly come in two sizes.
More specifically, Reuters's supply chain sources say the problem is with the backlight configuration in the new phones. Apple wanted to reduce the material used for the backlight from two layers to one in hopes of thinning the phones, says Reuters. But without that second layer, the phones apparently weren't bright enough, which forced the parts back to engineering and held up the assembly process earlier this summer. That's now impacting the number of screens Apple's been able to produce in the ramp up to the unveiling, according to Reuters' sources.
How many phones amounts to a sufficient number at launch anyway? I have no idea, nor does Reuters, but the news site defangs the issue somewhat by pointing out that its sources indicated the “hiccup” may or may not make it harder for you to get one of the new phones at launch or delay the phones outright. Thus we're left to mull the possibility that there could be a launch availability problem, but with absolutely no idea of its magnitude, on a scale that runs from "catastrophic" to "irrelevant."
Short of actually delaying the debut, which seems unlikely at this point--rumors of a September 9 event bubbled up just a few weeks ago, well after the June/July timeframe referred to in the Reuters piece--it's unlikely we'll know whether this story impacted the phones' arrival. Availability issues have been a major part of every new iPhone launch, and a certain amount of scarcity--so long as Apple's able to ramp up production to meet or surpass its fiscal projections in the long run--isn't the worst problem to have. Sony's PlayStation 4, for instance, which Sony claims was plagued by supply issues from launch, has gone on to sell 10 million units worldwide, a record-breaking figure even Sony can't explain.