3M Stiffener Flexible PCB
3M Stiffener Flexible printed circuits
Flexible printed circuits have become established in recent years as a medium for circuits.
The main users of flexible printed circuits are the technological sectors which need the following characteristics and benefits:
Implementation of compact, complex assemblies which minimise size and weight
Dynamically and mechanically robust when bent
Defined characteristics of the circuit systems on the circuit board (impedances and resistances)
Reliability of the electrical connections by minimising the number of connections between the modules
Saving connectors and wiring, also cost-saving by lowering the costs for component placement and assembly
2. Materials
Flexible base material: As a base material, Yaheng Circuit uses exclusively polyimide film which, compared to the alternative PET and PEN films has the advantage of a high processing temperature range, unrestricted solderability as well as the large operating temperature range. Depending on the requirements for the product and process, differing versions of film are used.
| Polyimide thickness | 25 µm, 50 µm, 100 µm | Yaheng Circuits standard: 50 µm |
| Copper | Single or double sided | |
| 18 µm, 35 µm, 70 µm | Yaheng Circuits standard: 18 µm or 35 µm | |
| Rolled copper (RA) | Suitable for dynamic, flexible applications | |
| Electrolytically deposited copper (ED) | Low elongation after fracture, only suited for static and semi-dynamic applications | |
| Adhesive systems | Acrylic adhesive | For dynamical, flexible applications, not UL 94 V-0 listed |
| Expoy adhesive | Limited dynamic flexibility, UL 94 V-0 listed | |
| Adhesive free | Yaheng Circuits standard, high flexibility, chemical resistance, and is UL 94 V-0 listed |
High quality fpc pcb board:with high speed transmission current stable,flexible,easy to install,good insulation.
Flexible pcba board:export led pcb board,PI material,Electrolytic copper,ultra-thin thickness,can be bent at will.
Double side flat cable flex pcb manufacturer:connection line+PI reinforcement+tin spraying process.
SINGLE SIDE FLAT CABLE BOARD:Reinforcing material Pl, auxiliary
material: conductive adhesive, shielding film,resistance to winding capacity of more than 150,000 times.
| Item | 3M Stiffener Flexible PCB |
| Max Layer | 8L |
| Inner Layer Min Trace/Space | 3/3mil |
| Out Layer Min Trace/Space | 3.5/4mil |
| Inner Layer Max Copper | 2oz |
| Out Layer Max Copper | 2oz |
| Min Mechanical Drilling | 0.1mm |
| Min Laser Drilling | 0.1mm |
| Aspect Ratio(Mechanical Drilling) | 10:1 |
| Aspect Ratio(Laser Drilling) | / |
| Press Fit Hole Ttolerance | ±0.05mm |
| PTH Tolerance | ±0.075mm |
| NPTH Tolerance | ±0.05mm |
| Countersink Tolerance | ±0.15mm |
| Board Thickness | 0.1-0.5mm |
| Board Thickness Tolerance(＜1.0mm) | ±0.05mm |
| Board Thickness Tolerance(≥1.0mm) | / |
| Impedance Tolerance | Single-Ended：±5Ω(≤50Ω)，±10%(＞50Ω) |
| Differential：±5Ω(≤50Ω)，±10%(＞50Ω) | |
| Min Board Size | 5*10mm |
| Max Board Size | 9*14inch |
| Contour Tolerance | ±0.05mm |
| Min BGA | 7mil |
| Min SMT | 7*10mil |
| Surface Treatment | ENIG,Gold Finger,Immersion Silver,Immersion Tin,HASL(LF),OSP,ENEPIG,Flash Gold;Hard gold plating |
| Solder Mask | Green Solder Mask/Black PI/Yellow PI |
| Min Solder Mask Clearance | 3mil |
| Min Solder Mask Dam | 8mil |
| Legend | White,Black,Red,Yellow |
| Min Legend Width/Height | 4/23mil |
| Strain Fillet Width | 1.5+0.5mil |
| Bow & Twist | / |
