IPC 7711A.pdf - 第167页
EQUIPMENT NEEDED Hot air pencil Hot air tip Liquid dispensing system Tweezers Vacuum pick-up tool OPTIONAL EQUIPMENT Manual solder paste dispenser MATERIALS Solder paste Cleaner Solder paste dispense needles Tissue/wipe …
NOTES
IPC-7711A
Number: 5.5.3
Revision:
Date: 2/98
Subject: Gull Wing Installation
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 NEEDED
Hot air pencil
Hot air tip
Liquid dispensing system
Tweezers
Vacuum pick-up tool
OPTIONAL EQUIPMENT
Manual solder paste dispenser
MATERIALS
Solder paste
Cleaner
Solder paste dispense needles
Tissue/wipe
PROCEDURE
1. Install tip into hot air pencil.
2. Set heater temperature of approximately 425°C and change as necessary.
3. Apply a small bead of solder paste along the land pattern using a dispenser. (See
Figure 1.)
4. Position component onto lands using a vacuum pick up tool or tweezers. (See
Figure 2.)
5. Adjust pressure output so hot air scorches a tissue from approximately 0.5 cm
away. (See Figure 3.)
6. Direct hot air over component with tip at a distance of 2.5 cm to pre-dry solder
paste. (See Figure 4.)
7. When pre-drying is observed (paste has dull, flat appearance), move tip closer
(0.5 cm) and heat until complete solder melt is observed. (See Figure 5.)
8. Clean, if required, and inspect.
Figure 1 Apply Solder Paste
Figure 2 Position Component
Figure 3 Adjust Pressure
Figure 4 Pre-dry Paste
Figure 5 Melt Joints
7711A
Rework of
Electronic Assemblies
Revision:
Date: 2/98
Gull Wing Installation
Hot Air Pencil/Solder Paste Method
Number: 5.5.4
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: 5.5.4
Revision:
Date: 2/98
Subject: Gull Wing Installation
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
--``,``,-`-`,,`,,`,`,,`---