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.

ACCEPTABILITY REFERENCES
IPC-A-610	12.0	Surface Mount Assemblies
PROCEDURE REFERENCES
CTC 7721	1.0	Foreword
CTC 7721	2.1	Handling Electronic Assemblies
CTC 7721	2.2	Cleaning
CTC 7721	2.5	Baking and Preheating
CTC 7711	7.1.1	Soldering Basics
CTC 7711	7.1.2	Preparation For Soldering
CTC 7711	7.1.3	Solder Joint Acceptability Criteria
IPC 7711	5.5.3	Point-To-Point Method

TOOLS & MATERIALS
Cleaner
Flux
Microscope
Solder
Soldering Iron with Tips
Wipes

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.