Device and method for generating identification key

A method of designing a device for generating an identification key, the method comprising:

• disposing a plurality of conductive layers in a first region included in a semiconductor chip layout, a density of the plurality of conductive layers disposed in the first region being equal to or greater than a first threshold and equal to or less than a second threshold, and the first threshold and the second threshold being less than a minimum density according to a design rule that ensures that all the plurality of conductive layers are formed in the first region;
• and
• disposing a reader configured to determine whether a first conductive layer designated in advance among the plurality of conductive layers is formed and to provide an identification key.

A method of manufacturing a device for generating an identification key, the method comprising:

• forming a plurality of conductive layers in a first region in a semiconductor chip, a density of the plurality of conductive layers formed in the first region being equal to or greater than a first threshold and equal to or less than a second threshold, and the first threshold and the second threshold being less than a minimum density according to a design rule that ensures that all the plurality of conductive layers are formed in the first region;
• and
• forming a reader in the semiconductor chip, the reader being configured to determine whether a first conductive layer designated in advance among the plurality of conductive layers is formed and to provide an identification key.