SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME

A method for fabricating a semiconductor device includes the steps of first providing a substrate having an one time programmable (OTP) device region, forming a shallow trench isolation (STI) in the substrate, forming a first doped region adjacent to the STI, removing part of the STI, and then forming a first gate structure on the substrate and the STI. Preferably, the first gate structure includes a high-k dielectric layer on the substrate and a gate electrode on the high-k dielectric layer, in which the high-k dielectric layer comprises a first L-shape.