How the ohmic contact is formed in metal semiconductor diode? (AL-Aluminium)

How the ohmic contact is formed in metal semiconductor diode? (AL-Aluminium) Correct Answer n+ diffusion in n-region near AL lead

Aluminium is p-type impurity in silicon. So, when it is used to make a contact with n-type silicon, its essential contact is ohmic and no PN-junction is formed. Therefore, the contact is done by making n+ diffusion in the region near the surface where aluminium is deposited.
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