Semiconductor integrated circuit device including protection circuit for preventing circuit breakdown by static electricity

A semiconductor integrated circuit device comprising:

• a first power wire which supplies a power potential to a circuit having a first function;
• a first ground wire which supplies a ground potential to the circuit having said first function;
• a first protection circuit which is connected between said first power wire and said first ground wire, and protects the circuit having said first function;
• a second power wire which supplies a power potential to a circuit having a second function;
• a second ground wire which supplies a ground potential to the circuit having said second function;
• a second protection circuit which is connected between said second power wire and said second ground wire, and protects the circuit having said second function;
• and
• a fuse element which is disposed in at least one of intervals between said first power wire and said second power wire and between said first ground wire and said second ground wire, and brings one of said intervals into a disconnected state.

A semiconductor integrated circuit device comprising:

• a first power wire which supplies a power potential to a circuit having a first function;
• a first ground wire which supplies a ground potential to the circuit having said first function;
• a first protection circuit which is connected between said first power wire and said first ground wire, and protects the circuit having said first function;
• a second power wire which supplies a power potential to a circuit having a second function;
• a second ground wire which supplies a ground potential to the circuit having said second function;
• a second protection circuit which is connected between said second power wire and said second ground wire, and protects the circuit having said second function;
• and
• a fuse element which is disposed in at least one of intervals between said first power wire and said second power wire and between said first ground wire and said second ground wire, and brings one of said intervals into either one state of a connected state and a disconnected state.

A mounted substrate device comprising:

• a semiconductor integrated circuit device including:
• a first power wire which supplies a power potential to a circuit having a first function;
• a first ground wire which supplies a ground potential to the circuit having said first function;
• a first protection circuit which is connected between said first power wire and said first ground wire, and protects the circuit having said first function;
• a second power wire which supplies a power potential to a circuit having a second function;
• a second ground wire which supplies a ground potential to the circuit having said second function;
• a second protection circuit which is connected between said second power wire and said second ground wire, and protects the circuit having said second function;
• and
• a fuse element which is disposed in at least one of intervals between said first power wire and said second power wire and between said first ground wire and said second ground wire, and brings one of said intervals into a disconnected state;
• and
• a circuit substrate on which said semiconductor integrated circuit device is mounted, and which has a plurality of wire patterns connected to said first power wire, second power wire, first ground wire, and second ground wire.

A wire disconnecting method of a mounted substrate device, comprising:

• forming a semiconductor integrated circuit device having a fuse element, said fuse element being disposed in at least one of intervals between a first power wire and a second power wire and between a first ground wire and a second ground wire, and bringing one of said intervals into either one state of a connected state and a disconnected state;
• mounting said semiconductor integrated circuit device on a circuit substrate;
• and
• disconnecting said fuse element in said semiconductor integrated circuit device.