20 May '15, 1pm

Monolithic 3-D IC Topped With Solar Cell for Internet of Things

Monolithic 3-D IC Topped With Solar Cell for Internet of Things

A laboratory leading the charge toward monolithic 3-D ICs has now added ambient-light energy harvesters to its integration repertoire. Engineers at Taiwan's National Nano Device Laboratories (NDL) hope to use the integrated photovoltaic component to create a convenient, mobile, and durable Internet-of-Things chip. The IoT chip is a 3-D stack that includes logic, a type of nonvolatile memory similar to flash, and SRAM all built atop each other. Usually, ambient light energy harvesters placed beside other chips on a circuit board. But building it right on top of a monolithic three-dimensional integrated circuit (3D IC) saved a lot of space, said Chang-Hong Shen, Division Director of the lab’s Emerging Device, said in a news conference in Taipei last month. “The integration reduced the size of the device by 60 percent,” he said. It also saves energy, because the distance elec...

Full article: http://spectrum.ieee.org/tech-talk/semiconductors/design/...

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