Patent ID: 8117981

Claim:
A liquid material supplying apparatus comprising: a storage tank which stores a liquid material; a pressure tank applying a positive pressure higher than an atmospheric pressure with respect to the liquid material; a syringe comprising a nozzle for discharging the liquid material; a valve member which is provided between the pressure tank and the syringe and which opens/closes a liquid path of the liquid material; a bubble defoaming filter which is provided between the syringe and the valve member and which removes bubbles from the liquid material; and a pressure applying mechanism which selectively applies a positive pressure higher than the atmospheric pressure and a negative pressure lower than the atmospheric pressure inside the syringe in order to start/stop discharging the liquid material from the nozzle, wherein: the nozzle adjoins an end of the syringe, the bubble defoaming filter comprises at least one mesh board having a small aperture arranged between a liquid entrance and an outlet of the bubble defoaming filter, and a space portion disposed at an upper portion of the bubble defoaming filter that is sandwiched between the liquid entrance and the mesh board, the space portion arranged at a first position comparatively close to the liquid entrance in a direction from the liquid entrance to the outlet, a liquid material gathering pipe is connected to the space portion of the bubble defoaming filter to lead the gathered liquid material to the storage tank, the outlet of the bubble defoaming filter is connected to a portion close to the syringe while a liquid path including a portion between the outlet and the syringe is formed with a uniform inside diameter.