Apparatus for producing ingot

An apparatus for producing an ingot, applied to an ingot-growing process, comprising:

• a crucible, having a hollow cylindrical body with an end bottom to provide thereinside an internal space for accommodating a raw crystal-growing material, a top of the body having oppositely an annular main outer wall and an annular main inner wall, an outer diameter of the annular main outer wall being greater than an inner diameter of the annular main inner wall, an annular top edge being formed to connect the annular main outer wall and the annular main inner wall, a connection portion of the annular main inner wall and the annular top edge being defined as an annular first guiding part, the annular first guiding part being a non-right angle structure;
• and
• a lid, having a bottom for disposing a seed, the bottom having a bottom protrusion, a maximum outer diameter of the bottom protrusion being less than a maximum outer diameter of the lid, an outer wall of the bottom protrusion having an annular second guiding part corresponding to the annular first guiding part, the annular second guiding part being a non-right angle structure, the lid being detachable and covering the top of the crucible when the bottom protrusion is inserted into the annular the main inner wall, and the annular first guiding part contacts the annular second guiding part;
• wherein a portion of the bottom of the lid surrounding the bottom protrusion is flush against the annular top edge of the crucible when the annular first guiding part is in contact with the annular second guiding part;
• wherein a positioning notch having a leading section and an engaging section is disposed within the annular first guiding part, and a positioning node is disposed upon the annular second guiding part, such that the lid is configured to cover the top of the crucible with the annular first guiding part conformably mating with the annular second guiding part when the positioning node is inserted into the leading section of the positioning notch, and the lid is detachable from the crucible when the positioning node and the annular first guiding part separate from the annular second guiding part and the leading section of the positioning notch;
• wherein the leading section is parallel to an axial direction of the body and the engaging section is perpendicular to the leading section;
• wherein when the annular first guiding part is conformably mated with the annular second guiding part, the lid is configured to allow the lid to float, separate from the crucible, fall back to tightly engage with the crucible, and rotate to displace the positioning node into the engaging section of the positioning notch to secure the lid to the crucible.