Witgain Technology Ltd
Witgain Technology Ltd Professional PCB Manufacturer
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6 Layer Rigid Printed Circuit Board
PCB Specifications:
Layer Count: 6 Layer Rigid PCB
Material: FR4
Board Thickness: 1.6MM
Min Hole: 0.25MM
Min Trace: 5/5Mil
Unit Size: 748mm*90mm/1up
Solder Mask: Black
Surface Treatment: ENIG
Application: LED Screen
Capabilities:
| Item | Capability |
| Layer Count | 1-24 Layers |
| Board Thickness | 0.1mm-6.0mm |
| Finished Board Max Size | 700mm* 800mm |
| Finished Board Thickness Tolerance | +/-10% +/-0.1(<1.0mm) |
| Warp | <0.7% |
| Major CCL Brand | KB/NanYa/LTEQ/ShengYi/Rogers Etc |
| Material Type | FR4,CEM-1,CEM-3,Aluminum,Copper,Ceramic, PI, PET |
| Drill Hole Diameter | 0.1mm-6.5mm |
| Out Layer Copper Thickness | 1/20Z-8OZ ; |
| Inner Layer Copper Thickness | 1/3OZ-6OZ |
| Aspect Ratio | 10:1 |
| PTH Hole Tolerance | +/-3mil |
| NPTH Hole Tolerance | +/-1mil |
| Copper Thickness Of PTH Wall | >10mil(25um) |
| Line Width And Space | 2/2mil |
| Min Solder Mask Bridge | 2.5mil |
| Solder Mask Alignment Tolerance | +/-2mil |
| Dimension Tolerance | +/-4mil |
| Max Gold Thickness | 200u'(0.2mil) |
| Thermal Shock | 288C, 10s, 3 Times |
| Impedance Contro | +/-10% |
| LTest Capability | PAD Size Min 0.1mm |
| Min BGA | 7mil |
| Surface Treatment | OSP, ENIG, HASL, Plating Gold, Carbon Oil,Peelable |
Our Service:
We can offer below services to our cutomers.
1) PCB Design
We have experienced engineers who used to work in HuaWei and Cisco. They have rich experience in PCB design and layout. If cutomers want to outsource the pcb design work to suppliers, we can take it.
2) PCB Manufacturing(Main Business)
PCB manufacturing is our main business. We have two factories which produce pcbs and we can produce very rich kinds of pcb, like HDI pcb, multilayer pcb, rigid-flex pcb, half hole pcb, thick copper pcb, hard gold pcb etc. This business is our main profit resources.
3) Components Outsourcing
Since our marketing office locates in ShenZhen City, we have very rich suppliers resources for componenets. If our customers want us to buy components, we can also do that.
4) PCB Assembly
We have very close brother factories which offer SMT and DIP services. For some customers, they only need samples pcba and they do not want to find too many suppliers.
Questions&Answers:
Question:What Is PCB Measling?
Answer:
Measling is the occurrence of discrete white spots in the base laminate material of a PCB. Measling usually occurs when the resin is not properly applied to the board during the lamination process. These defects appear during the PCB production cycle and signify a malfunctioning board.
A small amount of measling can be tolerated on printed circuit boards however when excessive this can degrade electrical and overall performance of the board. A combination of moisture and other contaminants is responsible for measles.
Adopting proper production techniques can help prevent its development. However, sometimes PCB Measling can occur during the life of the board due to mechanical stress. The finish on the glass fabric also contributes to measling. A higher the surface tension finish on the board, results in better wetting and better resistance to measling.
How to prevent PCB Measling?
Measling Test Procedure:
Various test methods are used to validate the measling defect. One is to expose the laminate to moisture prior to its immersion in 500 degrees Fahrenheit solder paste. If the laminate passes this test, then it will normally go through the etching and soldering process without measling and the appearance of white spots.