Prevention of bridging between solder joints
AssigneeInternational Business Machines Corporation
InventorsRisa Miyazawa, Takahito Watanabe, Hiroyuki Mori, Keishi Okamoto
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Abstract
A method of fabricating a connection structure is disclosed. The method includes providing a substrate that has a top surface and includes a set of pads for soldering, each of which has a pad surface exposed from the top surface of the substrate. The method also includes applying a surface treatment to a part of the top surface of the substrate close to the pads and the pad surface of each pad so as to make at least the part of the top surface and the pad surfaces of the pads rougher. The surface treatment includes sandblasting.
Claims8
A method of fabricating a connection structure, comprising:
- providing a substrate having a top surface and including a set of pads for soldering, each having a pad surface exposed from the top surface of the substrate;
- and
- applying a surface treatment to at least a part of the top surface of the substrate close to the pads and the pad surface of each pad of the set of pads so as to make at least the part of the top surface and the pad surfaces of the pads rougher,
- wherein the surface treatment includes sandblasting.
A method of fabricating a connection structure, comprising:
- providing a substrate having a top surface and including a set of pads for soldering, each having a pad surface exposed from the top surface of the substrate;
- and
- applying a surface treatment to at least a part of the top surface of the substrate close to the pads and the pad surface of each pad of the set of pads so as to make at least the part of the top surface and the pad surfaces of the pads rougher,
- wherein the surface treatment includes a plasma treatment.
A connection structure comprising:
- a substrate having a top surface;
- and
- a set of pads for soldering, each having a pad surface exposed from the top surface of the substrate;
- wherein the substrate has at least a part of the top surface to which a surface treatment of enhancing surface roughness has been applied and each pad of the set of pads has at least a part of the pad surface to which the surface treatment has been applied.
Dependencies are inferred from the claim text.