Fluxless laser soldering of radar housings
Abstract
Laser soldering of electronic components is a rapidly maturing technology and has been found to be particularly useful in the attachment of very fine pitch surface mount devices. Conversely, very little progress has been made to extend this technology to other soldering applications. It was the intention of this study to explore the feasibility of utilizing laser soldering to produce hermetic closure joints in radar packages. In producing hermetic joints, several requirements had to be met. It was essential to have a process that would eliminate the potential for entrapment of corrosive flux residues within the radar unit. In addition, it was desirable to create higher strength solder joints than could be produced by conventional step solder techniques which require lower temperature solders to be used in the final closure process. Further, solder mixing of the closure joint solder and solders used on components inside the radar was to be avoided. To fulfill the requirements, the localized heating characteristics of laser soldering made it an obvious choice for this application.
- Publication:
-
Presented at the JOWOG 22D Joining Subgroup Meeting
- Pub Date:
- 1990
- Bibcode:
- 1990jowo.meet...23K
- Keywords:
-
- Laser Welding;
- Neodymium Lasers;
- Optical Radar;
- Soldered Joints;
- Soldering;
- Electronic Equipment;
- Housings;
- Lasers and Masers