A method of fabricating a thin film heater includes providing a heating element supported on a surface of a flexible dielectric backing film; and attaching a layer of heat shrink film onto the surface of the dielectric backing film so as to at least partially enclose the heating element between the heat shrink film and the dielectric backing film. The method provides a much more precise and consistent method of assembling the heater assembly and improves the thermal properties and heat transfer to a heating chamber.

Provided is a resin molded body including: a resin porous body that contains a carbon fiber nonwoven fabric and has continuous voids; and a skin layer formed of a thermosetting resin composition. In this resin molded body, the continuous voids have a porosity of 50% by volume to 97% by volume, the skin layer has a porosity of 5% by volume or less, and the thermosetting resin composition is embedded at a depth of 50 m to 1,000 m on the resin porous body side of the resin molded body. Also provided is a method of producing a fiber-reinforced resin molded body, the method including, in the order mentioned: the preform forming step of forming a preform using a resin porous body that has continuous voids and a flexural modulus of 10 MPa or more based on the ISO178 method (1993); the sealing step of forming a closed space that encloses the preform with a molding die and/or a film; the injection step of injecting a thermosetting resin composition into the closed space; and the curing step of maintaining a temperature equal to or higher than a curing temperature of the thermosetting resin composition. This method provides a resin molded body that contains a porous structure and is excellent in surface quality and productivity.