Silicon CapacitorsApplication for Ultra Broadband and Optical

Our Silicon Capacitor technology is well appreciated in Ultra broadband systems, especially thanks to their excellent electrical performances, such as ESR, ESL, insertion loss, and also thanks to their outstanding stability over frequency, up to 220GHz for the new X2SC series.
Differential pairs, IPDs or Silicon Interposers complete a wide and rich portfolio dedicated to broadband applications.

The use of 400 Gb / s (400 GbE) Ethernet is becoming more widespread in next-generation data centers, and R&D of Ethernet above 400 Gb / s has already started. The demand for higher speeds and wider bandwidth will continue to accelerate in the future. Murata's silicon capacitors are ideal for use in ultra-wideband optical communication devices, with their very low insertion loss and very small size which help reducing power and footprint. As you might already know, in the case of 400GbE and 800GbE, high modulation rates such as 56GBaud and 112GBaud per signal line are required. They are well supported with our UBB SMD silicon capacitor (UBSC-serie for example). In parallel, the demand for Silicon Photonics type optical transceivers is increasing as well as the conventional legacy type optical transceivers. In addition, form factors are changing, such as On-Board Optics and Co-Packaged Optics, which require new design concepts and unique electronic components. Customization of dedicated products is also our strength if required.

Murata’s Silicon Capacitors technology offers the key features that are required to design applications from 56 to 112 GBaud rates, and is even ready to serve 224 GBaud advanced systems.

Silicon Capacitors removes the need for rooting to make interconnection lines and differential silicon capacitors are ideal for differential transmission modes. Silicon Capacitors technology can help saving up to 70% of PCB area.

Murata Broadband silicon capacitor (Si-cap) has very low insertion loss (S21) compared with MLCCs as below. This difference in performance between MLCC and Si-cap will be even wider when it comes to 56GBaud and 112GBaud.

Silicon Capacitors removes the need for rooting to make interconnection lines and differential silicon capacitors are ideal for differential transmission modes. Silicon Capacitors technology can help saving up to 70% of PCB area.

The high frequency characteristics are also affected by the design of the laminate substrate like PCB. Therefore, to maximize the performances of your system, Murata also provides support documentation and tools.

WLSC, WLDC, WBSC, and UWSC-series are well-suited for decoupling applications in bias circuits of driver, LD, TIA, PD. They contribute to miniaturization where space is limi.

Very low thickness of Silicon Capacitors allow wire bonds to be optimized wuth shorter length, and therefore, parasitics effect like equivalent inductance of wire bonds are reduced. In high frequencies systems, this is mandatory for better performances.

Silicon Capacitors removes the need for rooting to make interconnection lines and differential silicon capacitors are ideal for differential transmission modes. Silicon Capacitors technology can help saving up to 70% of PCB area.

Surface mounted Silicon Capacitors improve also the DC-decoupling performances and enable further the system integration. They can be assembled in the active module package directly, or even embedded inside the PCB to shorten the decoupling lines.

Surface mounted Silicon Capactors can also be used for DC decoupling purpose. Emebbeded Silicon Capacitors enable to reduce drastically the decoupling distance, and improves therefore the overall performances.

Silicon Capacitors removes the need for rooting to make interconnection lines and differential silicon capacitors are ideal for differential transmission modes. Silicon Capacitors technology can help saving up to 70% of PCB area.

The use of Murata's silicon integrated passive device (IPD) technology enables both miniaturization and performance improvements for optical communication devices. For example, silicon interposers for TOSA enable the integration of all capacitors and resistors, which are conventionally mounted separately. This further improves stability in response to changes in temperature and voltage. As a result, it is possible to reduce the amount of mounting work, achieve miniaturization, and improve performance.

The use of Murata's silicon integrated passive device (IPD) technology enables both miniaturization and performance improvements for optical communication devices. For example, silicon interposers for TOSA enable the integration of all capacitors and resistors, which are conventionally mounted separately. This further improves stability in response to changes in temperature and voltage. As a result, it is possible to reduce the amount of mounting work, achieve miniaturization, and improve performance.