It’s brand new day, so here’s another iPhone 5 rumor for you. Out of all the rumors floating around about the next iPhone, one is almost unanimous: it will be thinner. Along with that, there are rumors of a metal back, rather than glass.

So how would that be accomplished? The Wall Street Journal reports that it will use “in-cell” technology, to make the screen thinner.

Not only are they reporting this, they are also claiming that mass production of these screens has already begun.

Japanese liquid-crystal-display makers Sharp Corp. and Japan Display Inc.—a new company that combined three Japanese electronics makers’ display units—as well as South Korea’s LG Display Co. are currently mass producing panels for the next iPhone using so-called in-cell technology, the people said.

This not the first report of Apple interested in “in-cell” technology. In April, KGI Securities Analyst Ming-Chi Kuo took a detailed look at the technology and estimated that the new iPhone could be at least 1.4mm thinner than the iPhone 4S. Thanks to in-cell, Apple could also reduce the thickness of the barry and use a thinner metal back, although us here at the site are hoping for a bigger battery.

[via MacRumors]