×

Semi-conductor integrated circuit device including connection and disconnection mechanisms to connect and disconnect monitor circuit and semiconductor integrated circuit from each other

  • US 5,410,163 A
  • Filed: 08/29/1994
  • Issued: 04/25/1995
  • Est. Priority Date: 03/18/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A semiconductor integrated circuit device comprising:

  • a semiconductor integrated circuit main body having a circuit to be monitored;

    a monitor circuit to monitor said circuit to be monitored, provided on a chip in which said semiconductor integrated circuit main body is also mounted, said monitor circuit having the same structure as that of said circuit to be monitored;

    wirings extending from said monitor circuit to the semiconductor integrated circuit main body;

    connection mechanisms connected in series with said monitor circuit and said semiconductor integrated circuit main body through said wirings to disconnect said monitor circuit from said semiconductor integrated circuit main body through said wirings during an initial test state of said monitor circuit and to connect said monitor circuit to said semiconductor integrated circuit main body through said wirings during an operation state of said semiconductor integrated circuit main body so that said monitor circuit and said circuit to be monitored operate under the same operational condition; and

    disconnection mechanisms connected in series with said monitor circuit and said semiconductor integrated circuit main body through said wirings to connect said monitor circuit with said semiconductor integrated circuit main body through said wirings during the operation state of said semiconductor integrated circuit main body so that said monitor circuit and said circuit to be monitored operate under the same operational condition and to disconnect said monitor circuit from said semiconductor integrated circuit main body through said wirings during a second test state of said monitor circuit after completion of the operation state.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×