1.2 MM Thickness 4 Layer PCB TWS Bluetooth Earphone PCB Board

Basic Information
Place of Origin: China
Certification: UL
Model Number: PCB00035
Minimum Order Quantity: 1 pcs/lot
Price: negotiable
Packaging Details: Vacuum bubble bag packaging
Delivery Time: 20 days
Payment Terms: T/T
Supply Ability: 100k pcs/month
Detail Information
No Of Layers:: 4 Layer Material:: FR4 TG>130
Solder Mask Colour:: Green Solder Mask PCB Thickness:: 1.2 MM
Surface Technics:: ENIG 1U' Min Lind Space&Width:: 4/4 Mil
High Light:

1.2 MM Thickness 4 Layer PCB


UL 4 Layer PCB


TWS Bluetooth Earphone PCB Board

Product Description

4 Layer PCB 1.2 MM Thickness Used In TWS Earphone


  • Main Features:

1 4 Layer Printed Circuit Board PCB .
2  Immersion Gold treatment, gold thickness 1u'.
3 FR4 substrate material, tg130 degree.
4 Min line space and width 6/6 mil.
5 Copper thickness is 1 oz on each layer, 35 um on each layer.
6  Green solder mask and white silkscreen.
7  ROHS, MSDS, SGS, UL, ISO9001&ISO14001 Certificated


  • Our Product Categories:


Our Product Categories
Material Kinds Layer Counts Treatments
FR4 Single Layer HASL Lead Free
CEM-1 2 Layer/Double Layer OSP
CEM-3 4 Layer Immersion Gold/ENIG
Aluminum Substrate 6 Layer Hard Gold Plating
Iron Substrate 8 Layer Immersion Silver
PTFE 10 Layer Immersion Tin
PI Polymide 12 Layer Gold fingers
AL2O3 Ceramic Substrate 14 Layer Heavy copper up to 8OZ
Rogers, Isola high frequency materials 16 Layer Half plating holes
Halogen free 18 Layer HDI Laser drilling
Copper based 20 Layer Selective immersion gold
  22 Layer immersion gold +OSP
  24 Layer Resin filled in vias


  • FAQ

Q1: What is a PCB Test Coupon?

A1: During the PCB Manufacturing process, it is important to evaluate the quality of the boards being fabricated. A good way to do this is to fabricate a few extra boards called PCB Test Coupons which can be tested to evaluate the performance of the boards. PCB Test Coupons are designed to have the same spec (trace width, copper weight, via structure, etc.) as the original PCB board and are tested to identify manufacturing defects, material defects or other related defects.

During the PCB Fabrication process multiple PCBs are fabricated on a large board called a panel. The PCB Test Coupon is usually not a part of the core PCB panel, is built in section surrounding the PCBs. They are designed to represent actual board conditions for plating, etching and lamination. It's common to fabricate one coupon at each end of a board panel to verify performance across the entire panel. Any defect identified in the PCB Test Coupon would mean that other boards on the same panel would have the same issues.

Advantages of using PCB Test Coupon:

  • There is always a coupon which can be analyzed without the need to cut samples from any of the PCBs in a batch.
  • Coupons are the best way to measure and characterize the real-life PCB conditions.
  • They can be standardized using fixtures to speed up the testing process.
  • Apt for destructive testing, say demanding testing without damaging the desired PCB.
  • Monitoring of the production and assembly processes becomes easier, hence increases the production yields.



Contact Details

Phone Number : +8613826589739

WhatsApp : +8613826589739