Patent ID: 11940463
Assignee: TOKYO SEIMITSU CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 19:
20. A particle measurement method of measuring particles generated when a probe needle contacts an electrode pad of a wafer to check electrical characteristics of the wafer, the method comprising:
acquiring pad surface shape data indicating a surface shape of the electrode pad including a probe needle mark where the probe needle has contacted;
detecting a pad reference surface as a reference for measurement of the particles from a surface of the electrode pad based on the pad surface shape data;
calculating volume of a recessed portion recessed from the pad reference surface in the surface shape of the electrode pad and volume of a protruding portion protruding from the pad reference surface based on the pad surface shape data; and
calculating a particle quantity from a volume difference between the volume of the recessed portion and the volume of the protruding portion.