| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustor having a circuit board which provides a humidity resistance and an insect resistance, and is properly recycled. SOLUTION: In this combustor having the circuit board 1a, various types of electronic and electric parts 4 engaged in a combustion control are mounted on the circuit board and a protective layer 3a formed of a silicon resin is formed on the surface of the circuit board 1a. Either or both of a solder resist layer 51 as an insulation coating layer and a silk printing layer 52 are formed at least on the surface portion of the circuit board 1a on which the protective layer 3a formed of the silicon resin is not formed because the electronic and electric parts are large-sized beforehand. COPYRIGHT: (C)2004,JPO
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