Formation method of fin field effect transistor
A fin field effect transistor and fin technology, which is applied to semiconductor devices, electrical components, circuits, etc., can solve the problem that the electrical performance of the fin field effect transistor needs to be improved, so as to avoid shadow effect, weak blocking effect, and improve electrical performance effect
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[0032] It can be seen from the background art that the electrical performance of the fin field effect transistor formed in the prior art needs to be improved.
[0033] According to the research on the formation method of FinFET, refer to figure 1 , provide the substrate 100, after forming several discrete fins 101 on the substrate 100, it is usually necessary to perform ion implantation on the fins 101, and doping the fins 101 to improve the electrical performance of the fin field effect transistor, such as the threshold voltage ( Vt), saturation current (Idsat), etc.
[0034] The process steps of doping the fin portion 101 include: figure 2 , forming an initial photoresist layer covering the substrate 100 and the surface of the fin portion 101; exposing the initial photoresist layer; using a developer to clean the exposed initial photoresist layer to form a patterned photoresist layer The resist layer 102 exposes part of the surface of the fin portion 101 and the substrat...
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