IPC 7711A - 第109页
EQUIPMENT REQUIRED Soldering handpiece Soldering system Tweezer handpiece Removal tips Broad surfaced tip MATERIALS Flux-cored solder Cleaner PROCEDURE 1. Remove conformal coating (if any) and clean work area of any cont…
NOTES
IPC-7711A
Number: 3.7.3.1
Revision:
Date: 2/98
Subject: Gull Wing Removal (four-sided)
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 handpiece
Soldering system
Tweezer handpiece
Removal tips
Broad surfaced tip
MATERIALS
Flux-cored solder
Cleaner
PROCEDURE
1. Remove conformal coating (if any) and clean work area of any contamination,
oxides or residues.
2. Install removal tips into tweezer handpiece.
3. Start with tip temperature of approximately 315°C and change as necessary.
4. Using soldering handpiece, melt solder to form a solder bridge fill, joining all
component leads. (See Figure 1.)
5. Remove old solder from tips and thermal shock tips with damp sponge.
6. Tin bottom edges of tips with solder. (See Figure 2.)
7. Lower tips over component and squeeze handpiece, contacting ALL leads with
tips. (See Figures3&4.)
8. Confirm solder melt of ALL joints and lift component from PWB. (See Figures 4
& 5.)
9. Release component onto a heat resistant surface.
10. Re-tin tips with solder.
11. Prepare lands for component replacement.
Figure 1 Bridge Fill
Figure 2 Tin Tips
Figure 3 Position Tips
Figure 4 Melt All Joints
Figure 5 Lift Component
7711A
Rework of
Electronic Assemblies
Revision: A
Date: 10/03
Gull Wing Removal (four-sided)
Bridge Fill Method – Tweezer
Number: 3.7.4
Product Class: R, F, W, C
Skill Level: Advanced
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: 3.7.4
Revision: A
Date: 10/03
Subject: Gull Wing Removal (four-sided)
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
--``,``,-`-`,,`,,`,`,,`---