Silicon CapacitorsXBSC / UBSC / BBSC / ULSC Series

Ultra broadband surface mounted capacitor up to 100GHz

The XBSC / UBSC / BBSC / ULSC Capacitors target optical communication systems (ROSA /TOSA, SONET and all optoelectronics) as well as high speed data systems or products. These capacitors are designed for DC blocking, coupling and bypass grounding applications. The unique technology of integrated passive devices in silicon developed by Murata* offers low insertion loss, low reflection and high phase stability from 16 kHz up to more than 100 GHz for the XBSC, upto more than 60 GHz for the UBSC, up to 40 GHz for the BBSC and up to 20 GHz for the ULSC. These deep trench silicon capacitors have been developed with a semiconductor MOS process. They provide very high reliability and capacitance stability over voltage (0.1%/V) and temperature (60 ppm/K).

They have an extended operating temperature range from -55 to 150℃. Reliable and repeatable performances areobtained thanks to a fully controlled production line with high temperature curing (above 900℃) generating a highly pure oxide. The XBSC / UBSC / BBSC / ULSC series are compliant with standard JEDEC assembly rules, making theproduct fully compatible with high speed automated pick-and-place manufacturing operations. These capacitors areRoHS-compliant and are available either with ENIG terminations or lead-free prebumping depending on the case size.

*Murata Integrated Passive Solutions

Key features

  • Ultra broadband performance up to 110 GHz
  • Resonance free allowing ultra low group delay variation
  • Ultra low insertion loss thanks to an excellent impedance matching in transmission mode
  • Low ESL and low ESR in bypass grounding mode
  • High stability of capacitance value over temperature, voltage and aging
  • High reliability
  • Compatible with lead free reflow soldering

(please refer to our assembly note for more details)

Key applications

  • Optoelectronics / high-speed data
  • Trans-Impedance Amplifiers (TIA)
  • Receive-and-Transmit Optical Sub-Assembly (ROSA / TOSA)
  • Synchronous Optical Networking (SONET)
  • High speed digital logic
  • Broadband test equipment
  • Broadband microwave / millimeter wave
  • Replacement of X7R and NP0 capacitors
  • Low profile applications (400 or 100μm)

XBSC / UBSC / BBSC / ULSC series Specification

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Parameter Value
XBSC 100 GHz+ UBSC 60 GHz+ BBSC 40 GHz ULSC 20 GHz
Capacitance range 5.6 nF to 10nF (*2) 1nF to 100nF (*2) 1nF to 100nF (*2) 1nF to 100nF (*2)
Capacitance tolerances ±15% (*2) ±15 % (*2) ±15% (*2) ±15% (*2)
Mounting Method Solder Mounting (*7) Solder Mounting (*7) Solder Mounting (*7) Solder Mounting (*7)
Operating temperature range -55℃ to 150℃ -55℃ to 150℃ -55℃ to 150℃ -55℃ to 150℃
Storage temperature -70℃ to 165℃ (*3) -70℃ to 165℃ (*3) -70℃ to 165℃ (*3) -70℃ to 165℃ (*3)
Temperature coefficient +60ppm/K +60pmm/K +60pmm/K +60pmm/K
Breakdown Voltage (BV) 11VDC or 30VDC 11VDC or 30VDC 11VDC or 30VDC  11VDC or 30VDC
Capacitance variation versus RVDC 0.1%/V (from 0V to RVDC) 0.1%/V (from 0 to RVDC) 0.1%/V (from 0 to RVDC) 0.1%/V (from 0 to RVDC)
Insertion loss (IL) up to 60GHz <1.2dB (*) <0.4 dB (*4) <0.4 dB (*5)
<0.2dB (*6)
Return Loss (RL) up to 60GHz >20dB (*) >20dB (*4) >15dB (*5)
>20dB (*6)
Equivalent Series Inductance (ESL) Typ. 100pH (*) @ SRF Typ. 100pH (*4) @ SRF Typ. 100pH (*5) @ SRF
Typ. 100pH (*6) @ SRF
Equivalent Series Resistance (ESR) Typ. 300mΩ (*) Typ. 300 mΩ (*4) Typ. 500mΩ (*5)
Typ. 500mΩ (*6)
Insulation resistance 10 GΩ @ RVDC,
@25℃, t>120s, for 10nF
100GΩ @ RVDC,
@25℃, t>120s for 100nF
100GΩ @ RVDC,
@25℃, t>120s for 100nF
100GΩ @ RVDC, @25℃, t>120s for 100nF
Aging Negligible, < 0.001% / 1000h Negligible, < 0.001% / 1000h Negligible, < 0.001% / 1000h Negligible, < 0.001% / 1000h
Reliability FIT<0.017parts / billion hours FIT<0.017parts / billion hours FIT<0.017parts / billion hours FIT<0.017parts / billion hours
Capacitor height 100µm 400µm or 100µm 400µm or 100µm 400µm or 100µm
  • (*) e.g. 10nF / 0201M / BV 11V
  • (*2)Other values on request
  • (*3)w/o packing
  • (*4)e.g. 5.6nF / 0201M / BV 30V
  • (*5)e.g. 10nF / 0201/BV 30V
  • (*6)e.g. 100nF / 0402 / BV 11V
  • (*7)Please check the assembly note for the mounting methods of each product.

XBSC Series

UBSC Series

BBSC Series

ULSC Series

Substrate Design Support Tool

Silicon capacitor Matched Line

Assembly of Broadband Silicon Capacitors: Guidelines for improved Impedance Matching

UPDATE
2020/08/11

Assembly Note

Please check the assembly note for the mounting methods of each product.

Assembly Note Silicon Capacitor_Assembly by reflow (PDF: 1.6 MB)

UPDATE
8/7/2021

PDF Catalog

PDF documents related to silicon capacitors can be downloaded below

Commercial leaflet XBSC / UBSC / BBSC / ULSC V1.4_Murata (PDF: 1.9 MB)

UPDATE
24/2/2020