Patent ID: 7666260

Claim:
A vaporizer comprising: a vaporizing chamber including a vaporizing surface configured to vaporize a liquid material; a spray portion configured to spray the liquid material in the vaporizing chamber; a delivery part attached to the vaporizing chamber and including a gas outlet to deliver a gas material generated inside the vaporizing chamber to a process chamber through a gas feed line; first heating portion configured to heat the vaporizing chamber; and a second heating portion configured to heat a wall of the delivery part, wherein the delivery part comprises a filter member covering the gas outlet and including a peripheral portion set in thermal contact with and fixed to the wall of the delivery part, and a heat transfer member set in thermal contact with the filter member at a position other than a peripheral portion and configured to transfer heat of the second heating portion to the filter member, wherein the second heating portion and the filter member are separated from each other, and the heat transfer member is disposed between the second heating portion and the filter member and supports the filter member, wherein the vaporizer further comprises a shield plate covering the filter member and disposed farther from the gas outlet than is disposed the filter member, and wherein the shield plate is fixed to the heat transfer member along with the filter member with a spacer interposed between the shield plate and the filter member such that the shield plate receives heat through the heat transfer member and the spacer from the second heating portion.