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7.5.1 Soldering Surface Mount Gull Wing Components, Point To Point Method

  • This procedure covers the general guidelines for soldering surface mount Gull Wing components.
  • Place component and check alignment.
  • Place the soldering iron tip at the junction between the pad and component lead.
Outline
This procedure covers the general guidelines for soldering surface mount Gull Wing components. There is basically only one type of Gull Wing component. Whether leads are on two sides or four sides, or whether the component is large or small, the soldering principles are the same.

Minimum Skill Level - Intermediate
Recommended for technicians with skills in basic soldering and component rework, but may be inexperienced in general repair/rework procedures.

Conformance Level - High
This procedure most closely duplicates the physical characteristics of the original, and most probably complies with all the functional, environmental and serviceability factors.

Acceptability References
IPC-A-610 12.0 Surface Mount Assemblies
Procedure References
1.0 Foreword
2.1 Handling Electronic Assemblies
2.2 Cleaning
2.5 Baking And Preheating
7.1.1 Soldering Basics
7.1.2 Preparation For Soldering And Component Removal
7.1.3 Solder Joint Acceptability Criteria
IPC7711 5.5.3 Point-To-Point Method
Tools and Materials
Cleaner
Cleaner
General purpose cleaner for removing contamination.
Microscope
Microscope
Precision microscope with stand and lighting for work and inspection.
Solderinmg Iron
Soldering Iron, Solder and Flux
Properly maintained soldering iron, soldering iron tips, solder and flux.
Wipes
Wipes
Nonabrasive, low-linting wipes for cleanup.
Proprietary Information
This procedure contains proprietary information. The information is in a password protected folder for access by Circuit Technology Center, Inc. employees only.
Images and Figures
7.5.1 Soldering Surface Mount Gull Wing Components, Point To Point Method
Surface Mount Gull Wing Component
7.5.1 Soldering Surface Mount Gull Wing Components, Point To Point Method
Figure 1: Place component and check alignment.
7.5.1 Soldering Surface Mount Gull Wing Components, Point To Point Method
Figure 2: Place the soldering iron tip at the junction between the pad and component lead.

Procedure
  1. Add liquid flux to the corner pads.
  2. Place the component in position and hold it steady. The leads must be aligned with the pads. On large components this is best done by aligning the leads on opposite corners. (See Figure 1)
  3. Place the soldering iron tip at the junction between the pad and component lead at one of the corners. The soldering iron tip may rest at the junction of the component lead and pad or on top of the lead. Apply additional wire solder as needed. (See Figure 2)
  4. Remove the tip. Wait a moment for the solder to solidify before soldering the opposite corner.
  5. After the opposite corner is soldered, solder the remaining leads.
  6. Clean, if required and inspect.
Procedure for reference only.
Questions?
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