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    Silicon Capacitors

    Silicon CapacitorsThe lifetime of Murata silicon capacitor

    Relationship between product lifetime and recommended voltage

    The lifetime of Murata silicon capacitors is calculated by acceleration tests.
    Using the Oxide Fracture (TDDB: Time Dependent Dielectric Breakdown) measurement, one of the fracture mode measurements of semiconductors, we model the fracture mode and estimate the product lifetime using the acceleration coefficients of temperature and electric field.
    The recommended voltage with a product life of 10 years in a temperature environment of 100°C varies from technology to technology.
    Please refer to the table below.

    Murata's silicon capacitors
    Breakdown Voltage (BV) Recommended Voltage Murata Technology
    11V 3.6V PICS3
    30V 16V PICS3HV
    50V 21V PICSHV50
    100V 32V PICSHV100
    150V 68V PICSHV150
    Example
    If 32 V is continuously applied to a product of PICSHV100, the expected life is 10 years. (When the environmental temperature is 100°C)
    What does PICS mean?

    Fracture mode in semiconductor

    Figure of fracture mode in semiconductor

    When a dielectric such as an oxide film  is used at a constant voltage and temperature, oxide breakdown is observed over time. This is called TDDB and is one of the important fracture modes in semiconductors.
    This phenomenon is accelerated under high voltage or high temperature conditions.

    Example of test results

    Let's take one of Murata's technologies, PICS3HV (BV: 30 V).

    Vg (V) 37°C 100°C 150°C 225°C
    10 3076 years 671 years 276 years 102 years
    13 377 years 82 years 33 years 12 years
    16 46 years 10 years 4.1 years 1.5 years
    19 5.6 years 1.2 years 186 days 69 days

    As you can see from the table, if the rated voltage is 16V at 100°C, the lifetime of PICS3HV is more than 10 years.
    In this way, the product lifetime of the Murata silicon capacitor is calculated by each temperature and voltage applied.

    For details, see the following PDF document.

    Lifetime_of_3D_capacitors_Murata_technologies PDF

    See below for FAQs on silicon capacitor.

    Capacitors FAQ

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    6. The lifetime of Murata silicon capacitor
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