Abstract: A shim plate is capable of improving a loading deviation in the electrode coating width direction and a slot die coater including the same. The shim plate is disposed between a lower die block and an upper die block of a slot die coater to form a slot and to discharge a coating liquid through an outlet communicating with the slot. The shim plate includes a plurality of protruding parts that define a plurality of openings intermittently spaced apart along an area, and a blocking part configured to partially block a space between some of the protruding parts.

Abstract: An apparatus for measuring a step difference between a lip and a shim of a slot die includes: a laser sensor configured to measure a step difference between a lip and a shim of a slot die, the laser sensor being disposed to face the lip and the shim of the slot die, and a jig configured to come into contact with at least a part of the body where a portion of the slot die from which the ink is discharged is positioned. A method to implementing the same.