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Semiconductor device

  • US 9,570,436 B2
  • Filed: 06/05/2013
  • Issued: 02/14/2017
  • Est. Priority Date: 06/20/2012
  • Status: Expired due to Fees
First Claim
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1. A semiconductor device comprising:

  • A semiconductor structure configured to let a breakdown current occur due to a punch through breakdown,wherein the breakdown current flows by passing through a heterojunction interface that comprises polarization charges having a same polarity as that of carriers carrying the breakdown current,wherein the semiconductor structure comprises;

    a first semiconductor region disposed over a substrate and having a first conductivity type;

    a second semiconductor region having the first conductivity type; and

    a third semiconductor region located between the first and second semiconductor regions and having a second conductivity type,wherein the semiconductor device comprises;

    a first electrode having an ohmic characteristic with respect to the first semiconductor region;

    a second electrode having an ohmic characteristic with respect to the second semiconductor region; and

    a third electrode having a contact with the second semiconductor region and adjacent to the second electrode,wherein when a voltage positive or negative with respect to the first and third electrodes is applied to the second electrode during an On state, an On current by carriers having the first conductivity type flows between the second and third electrodes,wherein when a voltage positive or negative with respect to the first and third electrodes is applied to the second electrode during an Off state, the breakdown current by carriers having the first conductivity type flows between the second electrode and the first electrode, andwherein a current value of a leakage current flowing between the second and third electrodes is at most equal to or less than 1/1,000 of a current value of the On current.

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