Radiation imaging apparatus, radiation imaging system, and manufacturing method for radiation imaging apparatus

A manufacturing method for a radiation imaging apparatus, the method comprising:

• preparing a sensor panel including a first surface provided with a pixel array and a plurality of electrical connection portions and a second surface on an opposite side to the first surface;
• and
• fixing the sensor panel to a support base supporting the second surface through a first support member,
• wherein in an orthogonal projection to the first surface, the first support member is provided so as to overlap the pixel array, and the plurality of electrical connection portions is provided between a region in which the first support member overlaps the pixel array and an outer edge of the sensor panel,
• the method further comprises
• providing a plurality of second support members including one second support member provided so as to overlap and configured to support not less than two of the plurality of electrical connection portions, and
• connecting a plurality of wiring members to the plurality of electrical connection portions,
• in an orthogonal projection to the first surface, the plurality of electrical connection portions include an electrical connection portion provided at a position where the electrical connection portion does not overlap the plurality of second support members,
• each of the plurality of second support members is fixed to at least one of the second surface, and the support base, and
• a passage extending from the first support member to the outer edge is provided between the second surface and the support base so as not to overlap the plurality of second support members in an orthogonal projection to the first surface.