Silicon CapacitorsUWSC Series

Ultra large-band wire-bondable vertical capacitor up to 26GHz+

UWSC Capacitors target optical communication systems (ROSA / TOSA, SONET and all optoelectronics) as well as high speed data systems or products. The UWSC are designed for DC decoupling and bypass applications. The unique technology of integrated passive devices in silicon developed by Murata*, offers high rejection at frequencies higher than 26GHz. The UWSC capacitors are manufactured with both deep trench and MOS semiconductor processes to cover low and high capacitance requirements. The UWSC Capacitors provide very high reliability and capacitance stability over temperature (+60ppm/K) and voltage. They have and extended operating temperature range from -55 to 150℃. Reliable and repeatable performances are obtained thanks to a fully controlled production line with high temperature curing (above 900℃) generating a highly pure oxide. These capacitors are compatible with standard wirebonding assembly (ball and wedge). They are RoHS-compliant and are available with thick gold terminations.

*Murata Integrated Passive Solutions

Key features

  • Ultra large band performance higher than 26GHz
  • Resonance free and phase stability
  • Unique capacitance value of 1nF in 0101
  • High stability of capacitance value over temperature, voltage and aging
  • Ultra low ESR and ESL and high reliability
  • Compatible with standard wire bonding assembly (ball and wedge)

(please refer to our assembly note for more details)

Key applications

  • 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 (250µm, 100µm on request)

UWSC series Specification

Parameter Value
Capacitance range 47pF to 22nF(*)
Capacitance tolerances ±15%(*)
Mounting Method Wire-bonding vertical(*5)
Operating temperature range -55°C to 150°C
Storage temperature range -70℃ to 165℃(*2)
Temperature coefficient +60ppm/K
Breakdown Voltage (BV) 11V, 30V, 50V, 150V(*)(*6)
Capacitance variation versus RVDC 0.02%/V (from 0V to RVDC)
Equivalent Series Inductor (ESL) Typ 6pH(*4) @ SRF
Equivalent Series Resistor (ESR) Typ 14mΩ(*4)
Insulation resistance 100GΩ @ RVDC @ 25℃, t>120s for 100nF
Aging Negligible, < 0.001% / 1000h
Reliability FIT<0.017 parts / billions hours
Capacitor height 250µm or 100µm(*)
  • (*)Other values on request
  • (*2)w/o packing
  • (*4)e.g. 10nF / 0303 / BV 50V
  • (*5)Please check the assembly note for the mounting methods of each product.
  • (*6)See the FAQ here for the relationship between breakdown voltage and rated voltage.

UWSC Series

Refer to this FAQ regarding the relationship between voltage tolerance and rated voltage.
See the FAQ here for the part numbering.

Assembly Note

Assembly Note UWSC V1.7_Murata (PDF: 0.7 MB)


PDF Catalog

PDF documents related to silicon capacitors can be downloaded below

Commercial leaflet UWSC V1.4_Murata (PDF: 1.2 MB)