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

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

Conformance Level - High

Tools and Materials

Cleaner General purpose cleaner for removing contamination.

Flex-Rack PCB Holder Sturdy rack for PCBs used for rework and positioning.

Microscope Precision microscope with stand and lighting for work and inspection.

Precision Tool Set Nine precision-crafted tools for detailed circuit board work.

Soldering Iron Properly maintained soldering iron and properly sized soldering iron tips.

Soldering Skills Practice Kit Training kit to practice circuit board soldering skills prior to testing for certification.

Wipes Nonabrasive, low-linting wipes for cleanup.

Procedure

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.

Images

Soldering Surface Mount Gull Wing Components, Point To Point Method

Place component and check alignment.

Place the soldering iron tip at the junction between the pad and component lead.