Circuit boards are bar coded to allow tracking throughout the process from raw board creation to final assembly. When using a laser to produce a bar code, marks are typically made on a lasermarkable label or ink patch to prevent damage to the FR4 substrate because direct marking frequently results in pinholes through to the underlying copper layer.
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Laser lines
Glasgow trial explores AR cues for autonomous road safety
They've ploughed into a few vulnerable road users in the past. Making that less likely will make it spectacularly easy to stop the traffic for...