Seam Sealing of Electronic Packages Using Pulsed Laser Sources

Easy Synchronization of the Laser to the Part Profile

To protect sensitive electronic components from contaminants seeping in and to ensure safe and reliable operation, the components’ housing must be sealed hermetically. Using a laser source as a tool provides high welding speeds and produces fine welding seams with narrow welding radiuses. The advantage of precision laser welding is the contactless application of the laser’s energy, which avoids stressing the housing either thermally or mechanically. For example, to create the welding seam, the package to be welded is moved under a pulsed laser source causing the laser spots to overlap each other. This is ideal when the welding process is relatively simple, and the laser spot size is proportionate to the welding width.

For a consistently high welding quality, the size and spacing of the laser pulse overlap must remain constant; even at high speeds, and with complex geometries. PI’s motion solutions enable synchronization of the laser pulse overlaps and energy in line with the defined motion path.

Key Features of the Motion Solution

High-repeatable sealing process​
Highly accurate welding path​
Consistent welding quality​
Highly configurable weld path​
High throughput
Easy laser integration

Z Axis – Precise Vertical Motion of the Laser Head

  • Precision ball screw linear stage with servo motor and holding brake for reliable operation under high loads
  • Absolute encoders avoid workpiece collisions
  • Folded drivetrain reduces installation space
  • Economically priced with fast delivery
    >> L-812 High-Load Linear Stage

XY Axis – Repeatable Motion of the Workpiece

  • Servo motor-driven ball screw linear stages for high-speed and precision
  • Absolute encoders avoid referencing and ensure operational safety
  • Low XY profile and folded drivetrain reduce installation space
  • XY drag chain cable management protects during processing and prolongs lifetime
    >> L-812 High-Load Linear Stage

Flexible and Easy Automation Control

  • EtherCAT® motion control and drive modules provide open network connectivity
    >> G-901 Motion Controller
  • Laser control interface synchronizes the laser beam to the motion path for high-accuracy welding
    >> Laser Control Interface
  • Extensive programming environment and support for higher level languages
  • Flexible CAD-to-motion import
    >> SPC CAD/CAM Software
  • Autofocus capabilities of the controller for dynamic focus adjustment
  • Look-ahead capability adjusts velocity to maintain accuracy
  • Easy programming of motion path including G-Code

Do you have questions about our solutions? Our specialists are happy to help you!

Contact us today!