IPC 7711A.pdf - 第193页
EQUIPMENT REQUIRED Soldering system Soldering iron Cup of flat faced tip MATERIALS Flux PROCEDURE 1. Install appropriate tip. 2. Start with the coolest tip temperature possible (approximately 315°C) and change as necessa…
NOTES
IPC-7711A
Number: 6.1.3
Revision:
Date: 2/98
Subject: Removing Shorts Between Gull Wing
Page2of2
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
--``,``,-`-`,,`,,`,`,,`---
EQUIPMENT REQUIRED
Soldering system
Soldering iron
Cup of flat faced tip
MATERIALS
Flux
PROCEDURE
1. Install appropriate tip.
2. Start with the coolest tip temperature possible (approximately 315°C) and change
as necessary. The surface attraction of the solder to the tip must overcome that
of the leads.
3. Clean tip using a damp sponge.
4. Apply flux to the bridged leads. (See Figure 1.)
5. Hold the tip so the toe of the hoof runs parallel to the row of leads, that is, the
side of the tip toward the side of the component. The angle between the side of
the tip and the side of the component would ideally be zero for maximized heat
transfer, but can be up to 30° depending on operator preference. (See Figure 2.)
6. Bring the tip face down flat onto the bridge and pause for reflow. Draw the tip,
and the liquid bridge with it, down the row of leads, respreading the solder across
the rest of the leads. (See Figure 3.)
7. Clean, as required, and inspect.
Figure 1 Apply Flux
Figure 2 Hold Tip Parallel
30 degree
maximum
Figure 3 Draw Tip Down Row
7711A
Rework of
Electronic Assemblies
Revision:
Date: 2/98
Removing Shorts Between Gull Wing
Respread Method
Number: 6.1.4
Product Class: R, F, W, C
Skill Level: Intermediate
Level of Conformance: High
Material in this manual, IPC-7711 Rework of Electronic Assemblies, was voluntarily established by Technical Committees of
IPC. This material is advisory only and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the
use, application, or adaptation of this material. Users are also wholly responsible for protecting themselves against all claims
or liabilities for patent infringement. Equipment referenced is for the convenience of the user and does not imply endorsement
by IPC.
Page1of2
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
--``,``,-`-`,,`,,`,`,,`---
NOTES
IPC-7711A
Number: 6.1.4
Revision:
Date: 2/98
Subject: Removing Shorts Between Gull Wing
Page2of2
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
--``,``,-`-`,,`,,`,`,,`---