Substrate-fastening device and substrate-assembling structure using same

A substrate-assembling structure, comprising:

• a substrate comprising at least one perforation, and a first surface and a second surface opposite to each other, wherein the at least one perforation is passed through the first surface and the second surface along a first direction;
• and
• a substrate-fastening device comprising:
• a base carrying the substrate, wherein the first surface of the substrate faces the base;
• and
• at least one fastening component disposed on the base and spatially corresponding to each of the at least one perforation in one-to-one correspondence, wherein each of the at least one fastening component comprises:
• a supporting portion comprising a supporting surface disposed on the base, wherein the supporting portion is connected between the first surface of the substrate and the base, and the supporting surface is attached to the first surface;
• a positioning portion disposed on the supporting surface of the supporting portion and extended along the at least one perforation;
• a resin-attaching portion connected to the positioning portion, wherein the resin-attaching portion is extended from an interior of the at least one perforation of the substrate and passes through the second surface, and a gap is formed between an outer peripheral wall of the resin-attaching portion and an inner peripheral wall of the at least one perforation, wherein the at least one perforation is sleeved on the positioning portion and the resin-attaching portion along the first direction, and a circumscribed-circle diameter of the positioning portion is greater than a circumscribed-circle diameter of the resin-attaching portion;
• an end portion connected to the positioning portion through the resin-attaching portion;
• and
• a fixation resin disposed around the outer peripheral wall of the resin-attaching portion and connected between the end portion and the positioning portion, wherein the fixation resin covers a part of the second surface adjacent to a peripheral edge of the at least one perforation, and fills the gap.