Abstract: A fin field-effect transistor device with hybrid conduction mechanism, including a fin field-effect transistor, a second source region, and a second drain region; the fin field-effect transistor includes a substrate, a fin channel region, a first source region, and a first drain region; the height of the second source region is not lower than the height of the substrate between the first source region and the first drain region; the first source region, the first drain region and the second drain region are doped with first ions; the second source region is formed between the substrate and the first source region, the second drain region is formed between the substrate and the first drain region, the second source region is doped with second ions. This scheme can realize hybrid conduction of fin channel diffusion drift current and bottom channel band-to-band tunneling current, thus obtaining better ultra-steep switching characteristics.

Abstract: A gate-all-around transistor with hybrid conduction mechanism, including a GAA MOSFET, a second source region, and a second drain region. The GAA MOSFET includes a substrate, a first source region, and a first drain region. The first source region, the first drain region and the second drain region are doped with first ions, the second source region is doped with second ions. The second source region is formed between the substrate and the first source region, the second drain region is formed between the substrate and the first drain region. The height of the second source region and the second drain region are not less than the height of the substrate between the first source region and the first drain region. It can realize the hybrid conduction of the gate channel diffusion drift current and the bottom channel band tunneling current to obtain better ultra-steep switching characteristics.

Abstract: The present disclosure herein discloses a preparation method of a polyurethane-based nano-silver SERS substrate, belongs to the technical field of Raman spectrums, and aims to solve problems of complex preparation process, low sensitivity and the like of SERS substrates. The method uses solidified polyurethane as a skeleton, and the polyurethane adsorbs nano silver particles onto its surface due to a porous surface structure and adsorptivity, so an SERS substrate with crystal violet as a probe molecule and having a limit of detection as low as 10?10 M is obtained. The SERS substrate prepared by the method has a large surface area, adsorbs a large number of target molecules, and is easy to prepare, high in sensitivity, and conducive to qualitative and quantitative analysis of SERS.