PCBA Assembly Process Flow / PCB Assembly Manufacturing introduces the basic manufacturing process of PCBA / PCB assembly in different condition of component.It is about PCBA manufacture production.

1. PCBA assembly process flow
Single Side Surface Mounting
Single sided plug-in mounting
Double sided surface mounting
Single sided mix assembly
Double sided mix assembly
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Internal usage only

2. Single Side Surface Mounting
Solder printing
SMD parts
Reflow soldering
Solder paste——Reflow Soldering
Simple
Fast
Easy
Single sided plug-in mounting
Forming
THT parts
Wave soldering
Wave soldering
Simple Fast Easy
Forming is the most inefficient
work in the wave soldering ，
and it may cause electrostatic
damage and increase mistake
probability, also may delay the
delivery time the same time.
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
Internal usage only

3. Double sided surface mounting
B side
Solder paste printing
SMD parts
Reflow soldering
Flipping
A side
Solder paste printing
SMD parts
Reflow soldering
flipping
To make full use of PCB space, smaller the mounting area and improve efficiency,
A side usually is layout with big IC components and B side mainly chip
components.
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
3
Internal usage only

4. Single sided mix assembly
Solder paste printing
Surface mounted parts
Reflow soldering
THT components
Wave soldering
PCBA assembly with second heating, higher efficiency
Remark: If THT components quantity is small, could use reflow soldering and hand welding.
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
Internal usage only

5. One side SMT, the other THT
Glue process with
low pass, Not
recommended
surface mount adhesives SMD parts
Solidification
Flipping
THT
Wave soldering
PCBA assembly with second heating, higher efficiency
Remark: If THT components quantity is small, could use reflow soldering and hand welding .
Solder paste sprinting
Surface mounted parts
Reflow soldering
Hand welding
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
Internal usage only

6. Double sided mixed assembly （ 1 ）
Solder paste printing
SMT adhesive
SMD
Reflow soldering
parts
SMD parts
Flipping
Heating to solid
Flipping
THT parts
PCBA assembly heating three times,
low efficiency
Wave soldering
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
Internal usage only

7. Double sided mixed assembly(2)
B side
Solder paste printing
SMD Parts
Reflow soldering
Flipping
A side
Solder paste printing
SMD parts
Reflow soldering
Manual welding
Wave soldering(mould)
Manual welding is suitable for both side components are many and SMD part lot ， but THT
component is little ； If THT component is many ， Wave soldering(mould) is suggested.
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
Internal usage only

8. Contact Agile Circuit Co., Ltd
Chris Chow
Director of Sales and Marketing
Agile Circuit Co., Ltd
0316# East Tower of Shiji Square, the First Nanyou Industrial Park, Nan
Shan Dist,518054 China
Phone: 85-755-86050627
Email: sales@agipcb.com
To know more about PCB manufacture and assembly, visit us at
http://www.agipcb.com
@2013 Agile Circuit Co., Ltd All Right Reserved ||www.agipcb.com
Internal usage only