Welcome to SINOSIGMA PCB Circuit Board Manufacturer !
SIGMA GROUP LIMITED is a High-tech Professional PCB & PCBA
Manufacturer in China.
1. Excellent Quality and Competitive Price ;
2. High Technology Capability: Min: 3mil/3mil trace/space, Min
drill: 4mil .up to 30 layers.
3. Fast and timely delivery.
4. Related Quality certification: UL,ISO9001,ISO14001,ROHS,CQC
5. Our PCB are used to : Telecommunication equipment,Electric
instruments,and Led/wireless products field etc.
We offer PCB & PCBA fabrication providing consistent high
quality products and affordable prices. Whether your design is
simple or complex, SIGMA PCB's Printed Circuit Board Fabrication
service is ready to meet your requirements.
If you have any PCB & PCBA orders or inquiry, Please Contact
We are sure any of your inquiry will get our prompt attention &
Linkedin: SINISIGMA GROUP LIMITED & Becky-Hsu.
Q1.What is needed for quotation?
- PCB: Quantity, Gerber file and Technic requirements(material,surface
finish treatment, copper thickness,board thickness ,...)
- PCBA: PCB information, BOM, (Testing documents...)
|Layer||Quick Turn/Usual Time||Mass production|
|>1000pcs||Depend on BOM|
There is no MOQ in SINOSIGMA
The shipping cost is determined by the destination, weight, packing
size of the goods. Please let us know if you need us to quote you
the shipping cost.
Q5.How can I make sure the quality of my PCBAs?
We ensure that each piece of PCBA products work well before
shipping. We'll test all of them according to your test procedure.
Q6. How can I know the process of my PCBA production?
4-5 days for PCB production and components purchasing, and 5-10days
for PCB assembly and Testing.
Q7. When will I get the quotation after sent Gerber, BOM and test
Within 2 hours for PCB quotation and around 5 hours for PCBA
Q8.Is it possible to provide customer sample?
Yes, we can provide sample to test before mass production.
Q9. Do you keep our information and files secret?
Keeping secret for customers is the basic principle of our factory.
We can sign with the NDA with you.
Q10.Can I get the best price?
Yes. To help customers control cost is what we are always trying to
do. And we are the factory in Guangzhou is set up to reduce costs.