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US 2020/0029471 A1Published application
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.
Claims15
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 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 wherein
- 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.
9 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 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 wherein
- 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.
14 more elements
Dependencies are inferred from the claim text.