Memory device and operation method of the same

A memory device, comprising:

• a non-volatile memory circuit suitable for storing first defective column information and second defective column information;
• a first defective latch circuit suitable for receiving and storing the first defective column information from the non-volatile memory circuit during a boot-up operation;
• a first error correction code generation circuit suitable for generating a first error correction code for correcting an error of the first defective column information based on the first defective column information;
• a first error correction code latch circuit suitable for storing the first error correction code;
• a first error correction circuit suitable for correcting the error of the first defective column information transferred from the first defective latch circuit based on the first error correction code which is transferred from the first error correction code latch circuit so as to produce an error-corrected first defective column information;
• a first memory bank suitable for performing a column repair operation based on the error-corrected first defective column information;
• a second defective latch circuit suitable for receiving and storing the second defective column information from the non-volatile memory circuit during the boot-up operation;
• a second error correction code generation circuit suitable for generating a second error correction code for correcting an error of the second defective column information based on the second defective column information;
• a second error correction code latch circuit suitable for storing the second error correction code;
• a second error correction circuit suitable for correcting the error of the second defective column information transferred from the second defective latch circuit based on the second error correction code which is transferred from the second error correction code latch circuit so as to produce error-corrected second defective column information;
• and
• a second memory bank suitable for performing a column repair operation based on the error-corrected second defective column information.

A method for operating a memory device, comprising:

• transferring defective column information from a non-volatile memory to a defective column latch circuit;
• generating an error correction code based on the defective column information;
• storing the error correction code in an error correction code latch circuit;
• applying an active command to the memory device;
• performing an active operation in response to the active command;
• correcting an error of the defective column information transferred from the defective column latch circuit based on the error correction code which is transferred from the error correction code latch circuit in response to the active command so as to produce error-corrected defective column information;
• applying a column command and a column address to the memory device;
• determining whether the column address is the same as a defective column address included in the error-corrected defective column information;
• accessing a column corresponding to the column address when the column address is not determined to be the same as the defective column address included in the error-corrected defective column information;
• and
• accessing a redundant column when the column address is determined to be the same as the defective column address included in the error-corrected defective column information.