LDS Antenna Forming Principle and Design Techniques

LDS laser technology principle

Some non-conductive organic metal compounds are doped into the LDS material. After laser processing, the organic bonds of the metal compounds are broken up, the metal atoms are separated and attached to the plastic surface.

When organic compounds are exposed to laser, their organic bonds break, releasing metal atoms and organic matter. The surface activated by laser can be metallized.

LDS process

LDS Design Specifications

1. Product size tolerance

    Common cases： The internal dimension tolerance of laser engraving pattern is +/-0.10mm, and the dimension tolerance of laser engraving pattern to plastic part is +/-0.15mm

    Special Cases： The internal dimension tolerance of laser engraving pattern is +/-0.08mm, and the dimension tolerance of laser engraving pattern to plastic part is +/-0.12mm

2. Width and gap of laser engraved drawings

    Minimum laser engraving pattern width: 0.3mm

    The minimum laser engraving pattern spacing is: 0.5mm

3. The distance from the laser engraved pattern to the edge of the plastic part

    The minimum distance from the laser engraved pattern to the edge of the plastic part is: 0.2mm

4. The distance from the laser engraved pattern to the well wall

5. Corner design of plastic parts (with laser engraving graphics)

    It is recommended to round the corners as shown below (green is OK, red is a bad design), the recommended radius is: 0.3mm or more

6. Concave and convex surface design of plastic parts (with laser engraving graphics)

    In order to improve the efficiency and quality of laser engraving, it is recommended to retain a certain angle when designing the concave and convex surfaces, as shown in the figure below, and it is recommended to be more than 30 degrees.

7. Plastic parts (with laser engraving graphics) window connection design

    In order to avoid the accumulation of laser engraving dust at the window (the dust generated by the laser cannot be discharged and adheres to the surrounding plastic surface, and the laser dust will be plated), and to avoid overflow plating, the following window sizes are recommended:

8. Points to note in plastic mold design

    Avoid mold lines, ejector pins, and shrinkage in the laser engraving area. The maximum flash should be controlled within 0.05mm.

    If the ejector pin must appear in the laser engraving area, please design it as suggested in the following figure.

    If the parting line appears in the laser engraving area, the parting line difference should be controlled within 0.1MM.