Common-source operational amplifier and manufacture method for same
A technology of operational amplifiers and manufacturing methods, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., can solve problems such as reducing the frequency response characteristics of common-source operational amplifiers, and achieve the effect of improving frequency characteristics
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[0018] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0019] Please refer to Figure 4A-4F , taking the preparation of NMOS devices in a common-source operational amplifier as an example, the manufacturing method of the common-source operational amplifier includes:
[0020] First, if Figure 4A As shown, a gate structure 42 is formed on a substrate 41. The substrate 41 includes a source region and a drain region. The source region refers to the source extension region and the source heavily doped region to be formed later. region, similarly, the drain region refers to the region where the drain extension region and the heavily doped drain region will be formed subsequently;
[0021] Then, if Figure 4B As shown, the gate structure 42 is used as a mask, and the substrate 41 on both side...
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