Toshiba kicked off a project Friday that is the first step toward a new type of memory chip that could provide vastly greater capacity at a lower cost for digital gadgets such as cameras, smartphones and tablets. The company held a groundbreaking ceremony to begin expansion of its number-five chip fabrication building (fab 5) in Yokkaichi, a state-of-the-art chip production facility in central Japan operated by Toshiba and SanDisk under a joint venture.