Patent ID: 9460892
Filing Date: 2016-10-04
CPC Classification: B82Y,H01J

Claim Text:
1. A charged particle beam writing method comprising: storing in a charged particle beam writing apparatus a specific position coordinate; storing in the charged particle beam writing apparatus a first time interval pattern defining first time intervals to diagnose a drift amount of a charged particle beam and a second time interval pattern associated with the specific position coordinate and defining second time intervals to diagnose a drift amount of the charged particle beam; performing a first writing by irradiating a target object with the charged particle beam using the charged particle beam writing apparatus, and writing a first predetermined writing pattern on the target object diagnosing a drift amount of the charged particle beam repeatedly with the first time intervals defined in the first time interval pattern during the first writing; diagnosing a drift amount of the charged particle beam when the first writing reaches the specific position coordinate; and performing a second writing by irradiating the target object with the charged particle beam after the first writing reaches the specific position coordinate, and writing a second predetermined writing pattern on the target object diagnosing a drift amount of the charged particle beam repeatedly with the second time intervals defined in the second time interval pattern during the second writing, wherein the first time intervals increase as time passes since start of application of the first interval pattern, and the second time intervals increase as time passes since start of application of the second interval pattern.