Patent Number: 
Section: claims

1. A charged particle beam writing method comprising:writing a pattern on a first target object by using a charged particle beam in a writing apparatus;conveying a second target object after having written the pattern on the first target object, wherein even though the second target object is arranged on any one of conveying paths including a carry-out port and a carry-in port of the writing apparatus, a conveying operation for the second target object is not performed during writing the pattern on the first target object;determining the presence/absence of a request of a conveying operation of the second target object, wherein a pattern writing operation for the first target object is stopped by the request; anddetermining whether a stop time of the pattern writing operation of the first target object occurred by performing the conveying operation of the second target object is included in a pattern writing prediction time of the first target object,wherein when the stop time of the pattern writing operation is not included in the pattern writing prediction time, the conveying operation of the second target object is not performed, and the pattern is written on the first target object. 2. The method according to claim 1, whereinthe conveying operation includes at least one of an operation of a conveying robot, opening/closing operations of a gate valve, and an actuating operation of a vacuum pump. 3. The method according to claim 1, wherein when the stop time of the pattern writing operation of the first target object is included in the pattern writing prediction time, the pattern writing operation of the first target object is stopped while the conveying operation of the second target object is performed. 4. The method according to claim 1, whereinthe pattern writing prediction time has a predetermined margin, andwhen the stop time of the pattern writing operation of the first target object falls within the predetermined margin, the pattern writing operation of the first target object is stopped while the conveying operation of the second target object is performed. 5. A charged particle beam writing method comprising:writing, by using a charged particle beam, a pattern on a target object to which a chemical amplification type resist is coated;determining the presence/absence of a request of an item which stops a pattern writing operation for the target object; anddetermining whether a stop time of the pattern writing operation occurred by performing the item is included in a pattern writing prediction time of the target object, whereinwhen the stop time of the pattern writing operation is not included in the pattern writing prediction time, the pattern writing operation for the target object is continued without performing the item regardless of the request of the item. 6. The method according to claim 5, whereinwhen the stop time of the pattern wiring operation is included in the pattern writing prediction time, the pattern writing operation of the target object is stopped while the item is executed. 7. The method according to claim 5, whereinthe pattern writing prediction time has a predetermined margin, andwhen the stop time of the pattern writing operation falls within the predetermined margin, the pattern writing operation of the target object is stopped while the item is executed. 8. The method according to claim 5, whereinwhen the target object on which the pattern writing operation is performed is used as a first target object, the item includes a conveying operation of a second target object. 9. The method according to claim 8, whereinthe conveying operation includes at least one of an operation of a conveying robot, opening/closing operations of a gate valve, and an actuating operation of a vacuum pump.