Patent ID: 7816761

Claim:
A semiconductor device comprising: a semiconductor substrate having a first conductivity type and a surface thereof; an insulating layer selectively formed on the surface of the semiconductor substrate; a fuse formed on the insulating layer, the fuse having a first terminal and a second terminal; a first diffusion layer having a second conductivity type formed on the surface of the semiconductor substrate, the first diffusion layer being electrically connected to the first terminal of the fuse; a first resistor having a first end and a second end, the first end of the first resistor being connected to the first terminal of the fuse; a gate of a first transistor connected to the second end of the first resistor; a second resistor having a first end and a second end, the first end of the second resistor being connected to the second terminal of the fuse; and a second transistor connected to the second end of the second resistor, wherein the first transistor, the first resistor, the fuse, the second resistor, and the second transistor are electrically connected together in this order before the fuse is blown, and the first transistor is electrically disconnected from the second transistor after the fuse is blown, and wherein the first resistor is formed of a second diffusion layer formed on the surface of the semiconductor substrate.