| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure wherein the size is compact, the convenience is considered when a unit is built in a user side equipment and operability is improved in the case of mounting. SOLUTION: The structure of a driving unit or a control unit (driver) 1 of a motor is provided with a plurality of electronic components 4a, 4b constituting an electronic circuit, which are arranged on both sides of a dielectric substrate 2 arranged almost at the central position is the unit 1. The sum of the weights of the plurality of electronic components 4a, 4b arranged on both the sides is almost uniformly distributed. The sum of heating value of heating electronic components 4c, 4d is distributed almost uniformly, out of the plurality of electronic components 4a, 4b which are arranged on both sides interposing the dielectric substrate 2 in the unit, or arranged on both sides of the substrate 2. COPYRIGHT: (C)2004,JPO
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