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US 10,834,856 B2Granted
Electronic control unit
AssigneeDenso Corporation
InventorHiroyasu Sugiura
Life of this patent
Estimating the term…
Abstract
An electronic control unit has a substrate that includes a terminal connection portion that is a through hole that extends through the substrate from a first surface to a second surface. A resist opening along an outer edge of the terminal connection portion exposes a circuit pattern from a surface resist layer. A plurality of vias are disposed at positions adjacent to the resist opening in a heat receiving area to facilitate the transfer of heat during a soldering process from the first surface to the second surface.
Claims16
An electronic control unit comprising:
- a substrate including:
- a first surface;
- a second surface disposed opposite the first surface;
- a plurality of circuit patterns arranged in layers between the first surface and the second surface and layered from a first layer to an n-th layer, where n is an integer of 2 or more;
- a surface resist layer disposed on the first layer;
- a terminal connection portion provided as a through hole that pierces the first surface, extends through the substrate, and pierces the second surface, the terminal connection portion disposed at an outermost position near a periphery of the substrate;
- a resist opening that exposes a first circuit pattern of the first layer along an outer edge of the terminal connection portion;
- and
- a plurality of vias disposed at positions adjacent to the resist opening, and
- an outermost terminal positioned in the terminal connection portion and connected to the terminal connection portion with a connection member, wherein
- the first surface is a main surface of the substrate near the first layer and the second surface is another main surface of the substrate near the n-th layer, and
- the plurality of vias include a plurality of outer vias formed in a heat receiving area and on a periphery side of the substrate between the resist opening and the periphery of the substrate, the heat receiving area configured to receive heat from the connection member during a connection process when the outermost terminal is inserted into the terminal connection portion and is connected to the outermost terminal by the connection member, and
- the surface resist layer is disposed continuously between the resist opening and the plurality of vias.
10 more elements
An electric power steering device comprising:
- a speed reduction gear;
- and
- a drive device including
- a motor, and
- an electronic control unit comprising:
- a substrate including:
- a first surface;
- a second surface disposed opposite the first surface;
- a plurality of circuit patterns arranged in layers between the first surface and the second surface and layered from a first layer to an n-th layer, where n is an integer of 2 or more;
- a surface resist layer disposed on the first layer;
- a terminal connection portion provided as a through hole that pierces the first surface, extends through the substrate, and pierces the second surface, the terminal connection portion disposed at an outermost position near a periphery of the substrate;
- a resist opening that exposes a first circuit pattern of the first layer along an outer edge of the terminal connection portion;
- and
- a plurality of vias disposed at positions adjacent to the resist opening, and
- an outermost terminal positioned in the terminal connection portion and connected to the outermost terminal with a connection member,
- wherein
- the first surface is a main surface of the substrate near the first layer and the second surface is another main surface of the substrate near the n-th layer, and
- the plurality of vias include a plurality of outer vias formed in a heat receiving area and on a periphery side of the substrate between the resist opening and the periphery of the substrate, the heat receiving area configured to receive heat from the connection member during a connection process when the outermost terminal is inserted into the terminal connection portion and is connected to the outermost terminal by the connection member, and
- the surface resist layer is disposed continuously between the resist opening and the plurality of vias.
16 more elements
Dependencies are inferred from the claim text.