Semiconductor device
AssigneeRenesas Electronics Corporation
InventorsNorikazu MOTOHASHI, Tomohiro NISHIYAMA, Tadashi SHIMIZU, Shinji NISHIZONO
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Abstract
An electronic device has a control board having a plurality of wiring layers, a metal-made housing supporting the control board, and a fixing screw for fixing the control board to the housing through a washer. The control board includes a through hole penetrating from a third surface to a fourth surface, a through electrode formed inside the through hole, and a power system GND pattern formed on any wiring layer of the wiring layers. The power system GND pattern and the housing are electrically coupled through the through electrode, the washer, and the fixing screw.
Claims18
An electronic device comprising:
- a wiring substrate which has a first surface, a second surface on a side opposed to the first surface, and a plurality of wiring layers arranged between the first surface and the second surface;
- and
- a metal-made case which supports the wiring substrate,
- wherein the wiring substrate includes
- a first through hole which penetrates from one surface to other surface, of a surface on which an uppermost wiring layer of the wiring layers is formed and a surface on which a lowermost wiring layer is formed,
- a through electrode which is formed inside the first through hole, and
- a conductor pattern which is formed on a wiring layer positioned on a side inner, in a substrate thickness direction, than the uppermost and lowermost layers, of the wiring layers, and
- wherein the conductor pattern and the case are electrically coupled through the through electrode.
Dependencies are inferred from the claim text.