Patent ID: 9709334
Date: 2017-07-18
CPC Classifications: C01B,F27B,F27D

Claim:
1. A heat treatment container of a vacuum heat treatment apparatus for manufacturing silicon carbide, the heat treatment container comprising: A bottom; and A sidewall, A heating member, Wherein an exhaust passage is defined in the sidewall, Wherein the exhaust passage comprises: A plurality of upper exhaust passages defined in an uppermost portion of the sidewall, and a plurality of lower exhaust passages defined in a lower portion of the sidewall; Wherein the plurality of upper exhaust passages are disposed bordering a top edge of the sidewall; Wherein each of the plurality of upper exhaust passages has a corresponding lower exhaust passage of the plurality of lower exhaust passages in a vertical direction along the sidewall; Wherein a porous member is disposed inside the heat treatment container; wherein a height of the porous member is equal to or greater than heights of the lower exhaust passages; Wherein a connection portion between the plurality of upper exhaust passages and the sidewall has a rounded shape; Wherein the heat treatment container has a space, one open side, and a cover member covering the open side; Wherein the open side is at top of the heat treatment container; Wherein the connection portion makes contact with the cover member, Wherein the space is formed by the bottom and the sidewall integrally connected to the bottom, Wherein the bottom is plate shaped, Wherein the porous member is disposed only at a lower portion of the heat treatment container, Wherein the porous member is disposed only at a position corresponding to the lower exhaust passages, and Wherein the porous member is configured to block the lower exhaust passages such that raw material within the heat treatment container is inhibited from leaking, Wherein the heat treatment container comprises graphite, and Wherein the heating member applies a voltage to the graphite to generate heat.