Panel heater

摘要

A panel heater is made of a metallic panel member and an ohmic heat generating body which is covered with a sheath member and which is embedded in the metallic panel member. One of the sheath member and the panel member is formed by a first material capable of being alloyed with, and having a coefficient of thermal expansion close to a coefficient of thermal expansion of, a second material for the other of the sheath member and the panel member. The sheath member and the panel member are seamlessly integrated by diffusion bonding at a high temperature and high pressure.