Transfer molding method with sensor and shut-off pin
According to one embodiment, a mold includes a substrate clamping surface, a cavity, a suction part, a vent, an intermediate cavity, and an opening/closing part. The substrate clamping surface contacts a surface of a processing substrate. The cavity is recessed from the substrate clamping surface. The suction part is recessed from the substrate clamping surface. The vent is provided on a path between the cavity and the suction part, communicates with the cavity, is recessed from the substrate clamping surface to a vent depth. The intermediate cavity is provided between the vent and the suction part on the path, communicates with the vent, and is recessed from the substrate clamping surface to an intermediate cavity depth deeper than the vent depth. The opening/closing part opens and closes the path and is provided between the intermediate cavity and the suction part on the path.
1. A transfer molding method, comprising:
clamping a substrate between an upper side of a mold and a lower side of the mold;
suctioning a gas inside a cavity of the mold through a vent of the mold;
moving a transfer part to introduce a resin to the cavity; and
closing a shut-off pin after a sensing by a sensor, wherein
the transfer part is configured to be movable between an initial position and a post-movement position;
the mold includes:
a substrate clamping surface contacting a surface of the substrate;
the cavity recessed from the substrate clamping surface;
a suction part recessed from the substrate clamping surface;
the vent being provided on a path between the cavity and the suction part, communicating with the cavity, being recessed from the substrate clamping surface to a vent depth, and being used as an exhaust path of the gas;
an intermediate cavity being provided between the vent and the suction part on the path, communicating with the vent, and being recessed from the substrate clamping surface to an intermediate cavity depth deeper than the vent depth; and
the shut-off pin opening and closing the path and being provided between the intermediate cavity and the suction part on the path,
the transfer part is configured to fill the resin into the cavity in an open state of the shut-off pin,
the sensor is positioned between an input of the vent and the intermediate cavity and is configured to sense that at least a portion of the resin has passed through the vent and reached at least a portion of the intermediate cavity.
2. The method according to claim 1 , wherein
the sensing by the sensor includes at least one of:
sensing, at a path between the transfer part and the cavity, at least one of: a temperature of the mold, a pressure of the resin, reflected light at the mold, or reflected light at the substrate;
sensing, at the path between the cavity and the suction part, at least one of: a temperature of the mold, a pressure of the resin, reflected light at the mold, or reflected light at the substrate; or
sensing a position of the transfer part.
3. The method according to claim 1 , wherein
the sensing by the sensor includes
sensing, at a path between the transfer part and the cavity, at least one of: a temperature of the mold, a pressure of the resin, reflected light at the mold, or reflected light at the substrate.
4. The method according to claim 1 , wherein
the sensing by the sensor includes
sensing, at the path between the cavity and the suction part, at least one of: a temperature of the mold, a pressure of the resin, reflected light at the mold, or reflected light at the substrate.
5. The method according to claim 1 , wherein
the sensing by the sensor includes
sensing a position of the transfer part.
6. The method according to claim 1 , wherein
the mold comprises at least two intermediate cavities,
the shut-off pin includes multiple shut-off pins, a first shut-off pin positioned at a first position and a second shut-off pin positioned at a second position,
the first position is provided between one of the intermediate cavities and the suction part on the path,
the second position is provided between another of the intermediate cavities and the suction part on the path,
the sensor is configured to sense that at least a portion of the resin has reached at least a portion of the one of the intermediate cavities or another of the intermediate cavities,
the first position or the second position is set to a closed state after the sensing by the sensor.
7. The method according to claim 1 , wherein
the mold includes a gate being recessed from the substrate clamping surface to a gate depth,
the cavity is provided at least a part between the vent and the gate,
the vent depth being shallower than the gate depth.