Electronic distributing type ignition device
AssigneeHitachi, Ltd.
InventorsNorio Moriyama, Noboru Sugiura
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Abstract
In order to mount a power transistor chip, a multilayered member formed by fixing a molybdenum plate to a copper base is flattened by eliminating its deformation in the member caused by heated fixing through elastic working, it is possible to prevent cracking in a power transistor chip or a solder layer caused by the deformation. Especially, it is possible to improve the reliability of an electronic distributing type ignition device mounted on an engine block formed in a unit of an ignition controller and an ignition coil.
Claims3
An electronic distributing type ignition device formed in a unit of an ignition coil for each of spark plugs and an ignition controller having a power transistor for controlling said spark plug, wherein said power transistor in said ignition controller is mounted on and fixed to a molybdenum plate in a multilayered member formed by fixing the molybdenum plate on the fixing surface of a copper base and by flatting each of the surfaces.
Dependencies are inferred from the claim text.