Patent ID: 8754382
Filing Date: 2014-06-17
Classification: B82Y,H01J

Abstract:
1. A drawing apparatus which performs drawing on a substrate with a pulse of a charged particle beam, the apparatus comprising: a detector configured to output a current in accordance with a pulse of a charged particle beam incident thereon; and a processor including a capacitor which is charged with a current output from the detector in accordance with the pulse incident thereon, and configured to detect a value of a voltage of the capacitor, and to obtain an intensity of the pulse incident on the detector based on a value of a capacitance of the capacitor and the detected voltage value, wherein the processor includes a resistor, and is configured to detect a current output from the detector in accordance with a charged particle beam incident thereon through a voltage drop across the resistor, to supply a current, having a current value that is determined based on the detected current, to the capacitor to detect a value of a voltage of the capacitor to which the current having the determined current value is supplied, and to obtain the value of the capacitance based on the determined current value and the detected value of the voltage of the capacitor to which the current having the determined current value is supplied.