BOARD
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United States of America Patent
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Issued Date -
Oct 12, 2023
app pub date -
Jan 23, 2023
filing date -
Mar 22, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a new board with a sufficient adhesion strength between an insulating layer and a metal layer. A board of the embodiment is a board including an insulating layer and a metal layer. The insulating layer contains a resin containing an insulating filler. The metal layer is disposed on a surface of the insulating layer. The resin is present partially between at least a part of the insulating filler present in the surface of the insulating layer and a metal constituting the metal layer. In an interface between the insulating layer and the metal layer, a depth of the metal present at a deepest portion in the insulating layer is 1.2 µm or less based on the resin or the insulating filler present in an outermost surface of the insulating layer.
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