TONGZHAN INDUSTRIAL LIMITED
TONGZHAN INDUSTRIAL LIMITED
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Producibility Immersion Gold + OSP PCB Board Design Rigid - Flex Boards Rogers
Prototype PCB Assembly Description:
1. Focus on component sourcing.
2. Management team with 10+ years of experience in the material.
3. PCB Component Sourcing Teams: Project department, Engineering department, Purchasing.
4. department, Quality department, Customs Declaration department.
5. Professional component validation engineers.
6. Professional BOM Engineers.
Prototype PCB Assembly Parameters:
| Item | Technical Parameter |
| Layer | 2-64 |
| Thickness | 0.3-6.5mm |
| Copper Thickness | 0.3-12 oz |
| Min Mechanical Hole | 0.1mm |
| Min Laser Hole | 0.075mm |
| HDI | 1+n+1,2+n+2,3+n+3 |
| Max Aspect Ratio | 20:01 |
| Max Board Size | 650mm*1130mm |
| Min Width/Space | 2.4/2.4mil |
| Min Outline Tolerance | ±0.1mm |
| Impedance Tolerance | ±5% |
| Min PP Thickness | 0.06mm |
| Bow &Twist | ≤0.5% |
| Materials | FR4, High-Tg FR4, Rogers, Nelco, RCC, PTFE, M4, M6, TU862, TU872 |
| Surface Finished | HASL, HASL Pb Free Immersion Gold/Tin/Silver Osp, Immersion Gold+OSP |
| Special Capability | Gold Finger Plating, Peelable, Carbon ink |
Prototype PCB Assembly Introduction:
In high-speed design, the characteristic impedance of controlled impedance boards and lines is one of the most important and common problems. First understand the definition of a transmission line: A transmission line consists of two conductors of a certain length, one for sending a signal and the other for receiving a signal (remember the concept of "loop" instead of "ground"). In a multilayer board, each trace is part of a transmission line, and the adjacent reference plane can act as a second trace or return. The key to a line being a "good" transmission line is to keep its characteristic impedance constant throughout the line.