PCB manufacturing solder paste technical requirements

1,000 Published by FASTPCBA 11月 18,2019

PCB manufacturing solder paste technical requirements


PCB manufacturing solder paste is a key process material which is necessary for reflow soldering processes. The solder paste is a cream solder which is uniformly mixed by an alloy powder and  paste flux carrier. The printability and solderability quality of the solder paste directly affect the assembly quality of the SMT.

pcb manufacturing solder paste

pcb manufacturing solder paste


1. Before solder paste application

A. During solder paste preparation and storage period before printing, store at 2-10 ° C (or at room temperature) for one year (at least 3-6 months), the performance of solder paste should remain unchanged

B.The metal powder and flux in the solder paste are not layered.

C.Low hygroscopicity, low toxicity, odorless, non-corrosive.


2.During solder paste application

A.It is required that the viscosity of the pcb manufacturing solder paste changes little with time. When printing continuously at room temperature, it is required that the solder paste is not easy to dry.

B.Has good de-moldproperty, does not block the template leak when printing continuously

C.Keep the original shape and size after printing, nodrop, good thixotropy (shape retention)

D.After printing keep at room temperature for 12-24h, at least 4h, its performance remains unchanged.


3.When reflowing

A.During the reflow soldering preheating process, the solder paste collapse deformation is required to be small.

B.The reflow wettablityis good, the solder fly is less, and the minimum amount of solder balls is formed.

C.Good wettabililty performance.


4.After reflow

A.The formed solder joints have sufficient strength to ensure that the solder joints will not be damaged due to factors such as power generation and vibration.

B.Post-weld residue has good stability, no corrosiveness, high insulation resistance, easy to clean after welding

PCB manufacturer reflow soldering machine heating system

PCB manufacturer reflow soldering machine heating system   The full hot air and infrared hea...

Do you like ? 1,113

Read more
Types and advantages of flexible pcb circuit board

Types and advantages of flexible pcb circuit board The PCBA board is the finished product after t...

Do you like ? 1,188

Read more
What are the SMT process

What are the  SMT process Everyone knows that the electronic products we use in our lives are ass...

Do you like ? 2,580

Read more
What is the difference between PCB and PCBA

What is the difference between PCB and PCBA What is a PCB PCB = printed circuit board; PCB is an ...

Do you like ? 2,323

Read more

IATF16949 The most important function of automotive electronics is to improve the safety, comfort...

Do you like ? 2,312

Read more

ISO9001 ISO9001 quality management system is the foundation of enterprise development and growth....

Do you like ? 2,122

Read more
High-tech certification

High-tech certification The national high-tech enterprise certification is a comprehensive evalua...

Do you like ? 1,987

Read more
Gold supplier

Gold supplier     

Do you like ? 2,333

Read more