Ohmic contact is a type of electrical contact between a metal and a semiconductor that allows for current to flow with low resistance, while schottky contact is a type of electrical contact between a metal and a semiconductor with a higher resistance and a rectifying behavior.
Ohmic contact is essential for ensuring efficient and reliable current flow in a semiconductor device, while schottky contact can lead to rectification and non-ideal behavior that can impact the device's performance.
No, ohmic contact and schottky contact have distinct properties and cannot be used interchangeably in semiconductor devices. Ohmic contact is typically preferred for efficient current flow, while schottky contact is used for rectification and other specialized applications.
The choice between ohmic contact and schottky contact depends on the specific properties and requirements of the device, such as the materials used, desired current flow, and desired rectification behavior.
In most cases, the type of contact used in a semiconductor device cannot be changed after it has been fabricated. However, for some devices, it may be possible to change the type of contact through additional processing steps or material modifications.