ELOHIM has developed a super-small high-density silicon capacitor for the 5th generation (5G) application. A capacitor is an electrical component that temporarily stores a large amount of electric charge in a conductor. It plays an important role to stably supply current to electronic components. Starting with 5G smart devices, ELOHIM plans to expand the field for parts application to autonomous driving and artificial intelligence (AI).
ELOHIM collaborated with a partner global company to develop a super-small high-density silicon capacitor. ELOHIM’s silicon capacitor is tiny and has a thickness of 60 micrometers (µm). Conventional multilayer ceramic capacitors (MLCCs) have a thickness of several hundred µms.
The capacitance refers to the capacity to charge electricity, and the new capacitor has the capacity of 500 nF/mm2, which is an ultra-dense capacity level. The capacitance of the existing silicon capacitors is one-fifth of the ELOHIM’s product.
ELOHIM developed silicon capacitors using differentiated process technologies, such as high-K metal gates that effectively reduce leakage current while improving circuit integration, and dielectric film that prevents charge leakage.
The number of connection terminals is also special. Compared to MLCC or general silicon capacitors with 2 terminals per mm2, ELOHIM’s silicon capacitor has more than 50 terminals per mm2. It is more advantageous to optimize the power of electronic devices when there are more terminals. Optimizing the power allows device to reach maximum performance.
ELOHIM’s silicon capacitors are so small that they can be placed near highly integrated high-performance system semiconductors. They can easily optimize the power even in the high frequency band. It can reduce the noise by one-tenth the level of inductance compared to MLCC or general silicon capacitors. Inductance refers to the strength at which voltage is induced by electromagnetic waves.
ELOHIM CEO Yeong-Lyeol Park said, “It is expected that silicon capacitors will be integrated into high-tech semiconductor packages such as 2.5-dimensional semiconductor substrates and 3-dimensional (3D) stacked packages. We are also developing silicon capacitors that are embedded on a printed circuit board (PCB).”
ELOHIM is a technology venture company made up of experts from global semiconductor companies. It develops turn-key solutions which consist of silicon manual element design, process, packaging, and testing.