Patent ID: 11929245
Assignee: HAMAMATSU PHOTONICS K.K.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC H

Claim 7:
8. An ionization method, comprising:
a process of preparing a conductive substrate having a first surface, a second surface on a side opposite to the first surface, and a plurality of through-holes opening on each of the first surface and the second surface;
a process of arranging a sample on a mount portion and arranging the substrate on the sample so that the second surface is in contact with the sample;
a process of providing a matrix crystal layer on the first surface by evaporation of a matrix material; and
a process of ionizing components of the sample having moved from the second surface side to the first surface side via the plurality of through-holes together with the matrix by irradiating the first surface with an energy beam while applying a voltage to the substrate in a state where the sample is arranged between the mount portion and the substrate,
wherein, in the process of providing the matrix crystal layer, the matrix crystal layer is formed with a plurality of matrix crystal grains so as to include a gap communicating the plurality of through-holes with an outside.