CEM-1 External keyboard PCB Carbon circuit board

CEM-1 External keyboard PCB Carbon circuit board
Product Details

Specifications of PCB:


1-38 layers PCB



FR-4, Rogers, Fr-2, ECT

Copper Thickness

1/2 oz min; 12oz max

Finish Board Thickness

0.2 mm-6.00mm(8mil -126mil)Surface Finish

Surface Treatment

Solder Mask(black, green, white, red, blue, thickness>=12um, Block,


Silkscreen(black, yellow, white)

Peel able-mask(red, blue, thickness>=300um)

Surface Finish




Conductor Width(W)

+/-0.05mm(2mil) or +/-20% of original

Hole Diameter(H)


Non PTHL:+/-0.05mm(2mil)



Panel Size

110 x 100mm(min)

660 x 600mm(max)

Min Trace Width & Line Spacing

0.075mm /0.075mm (3mil/3mil)

Min Hole Diameter for CNC Drilling


Min Hole Diameter for Punching


Hole Position

+/-0.075mm(3mil) CNC Drilling

Test Voltage


Layer-layer misregistration

4 layers:0.15mm(6mil)max

6 layers:0.25mm(10mil)max

CEM-1 External keyboard PCB Carbon circuit board:

The main technical parameters:

1, the resistance value range: 10 & Omega; ~ 1M & Omega;
2, the law of resistance: linear
3, resistance value tolerance: ±5% -±20%
4, linear tolerance: ±0.5% - ±3%
5, durability: 200,000 or 1 million times level
6, resistance temperature coefficient:±1500PPM
8, material: FR1/FR4/CEM-1/CEM-3

 Special introduction of manufacturing process:

Our services:

We are professional manufacturer in  various Ceramic PCB/PCBA and Carbon PCB/PCBA with 9 years experience, we can provide a reasonable price with high quality products.

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Our products:

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1. May I ask how you guarantee the quality of the products?

For PCB, we will use Flying Probe Test, E-test etc.
For PCBA, we need you to offer us a method or test fixture for the function test. Every production process will have the special quality control. 

2. What services can you supply ?
We are a manufacturer  providing OEM PCB and PCBA producing services for more than 10 years. We can provide one stop services from PCB producing, components purchasing, assembly, quality control, ect. 

3. What file we need to prepare if we want to get an quotation from you?
For PCB and FPC quotation, please show us Gerber files and specification.

For PCBA and FPCA quotation, please show us Gerber files, specification and BOM list.


3.  Can I receive samples to test your quality ?
Yes,it is reasonable to get sample to test quality at first,but you should pay for samples,and we will return all sample cost in future mass production if the the gross cost of batch order has reached to a certain amount.

4.To what acceptability standards do we build?

A: IPC A600 Class 2 through IPC 6012 Class 3A


5.Where should you send your files to get a printed circuit board quote or place an order?

A: You can simply send us an inquiry via Alibaba site. Very soon our sales person will contact you for your inquiry/files. Or you can send your inquiry/files to our email address

Contact: Sunny

Tel: +86-0755-29621535 EXT 822

Mol/whatapp: +86-18038188954

Skype: 594432891@qq.com

Email:  sales7@xdpcba.com

Website:   www.xdpcba.com   

Website:  www.xdxpcb.com   


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