| 摘要 |
The present invention relates to a multi-layer laminate or substrate manufacturing process for forming soldering surfaces on a substrate of a module without requiring a solder mask. In one embodiment, a substrate is provided having a substrate body, soldering pads, and a metal segment. A patterned mask is formed over the substrate such that soldering surfaces of the soldering pads remain exposed. The soldering surfaces of the soldering pads are plated to create plated soldering surfaces over the soldering pads. The plated soldering surfaces are the regions for solder placement. The patterned mask is then removed from the substrate. Next, an anti-wetting treatment is applied to the substrate such that any unplated metal surfaces react to the anti-wetting treatment to form treated surfaces. As such, the plated soldering surfaces will wet solder while the treated surface will not wet solder. In a preferred embodiment, the anti-wetting treatment is an oxidation process.
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