Active Prototype AOI SPI XRAY PCB Assembly Service Roger Rigid Flex Turnkey
Layers of Printed Circuit Board
A printed circuit board can have multiple layers of copper which almost always are arranged in pairs. The number of layers and the interconnection designed between them (vias, PTHs) provide a general estimate of the board complexity. Using more layers allow for more routing options and better control of signal integrity, but are also time consuming and costly to manufacture. Likewise, selection of the vias for the board also allow fine tuning of the board size, escaping of signals off complex ICs, routing, and long term reliability, but are tightly coupled with production complexity and cost.
One of the simplest PCB assembly service to produce is the two-layer board. It has copper on both sides that are referred to as external layers; multi layer boards sandwich additional internal layers of copper and insulation. After two-layer PCBs, the next step up is the four-layer. The four layer board adds significantly more routing options in the internal layers as compared to the two layer board, and often some portion of the internal layers is used as ground plane or power plane, to achieve better signal integrity, higher signaling frequencies, lower EMI, and better power supply decoupling.
Multi-layer boards in PCB assembly service, the layers of material are laminated together in an alternating sandwich: copper, substrate, copper, substrate, copper, etc.; each plane of copper is etched, and any internal vias (that will not extend to both outer surfaces of the finished multilayer board) are plated-through, before the layers are laminated together. Only the outer layers need be coated; the inner copper layers are protected by the adjacent substrate layers.
Electrical properties of Printed Circuit Board
Each trace consists of a flat, narrow part of the copper foil that remains after etching. Its resistance, determined by its width, thickness, and length, must be sufficiently low for the current the conductor will carry. Power and ground traces may need to be wider than signal traces. In a multi-layer board one entire layer may be mostly solid copper to act as a ground plane for shielding and power return. For microwave circuits,transmission lines can be laid out in a planar form such as stripline or microstrip with carefully controlled dimensions to assure a consistent impedance. In radio-frequency and fast switching circuits the inductance and capacitance of the printed circuit board conductors become significant circuit elements, usually undesired; conversely, they can be used as a deliberate part of the PCB assembly service, as in distributed-element filters, antennae, and fuses, obviating the need for additional discrete components. High density interconnects (HDI) PCBs have tracks and/or vias with a width or diameter of under 152 micrometers.
Specification
| NO. |
Items |
Capabilities |
| 1 |
Layers |
2-68L |
| 2 |
Maximum machining size |
600mm*1200mm |
| 3 |
Board thickness |
0.2mm-6.5mm |
| 4 |
Copper thickness |
0.5oz-28oz |
| 5 |
Min trace/space |
2.0mil/2.0mil |
| 6 |
Minimum finished aperture |
0. 10mm |
| 7 |
Maximum thickness to diameter ratio |
15:1 |
| 8 |
Via treatment |
Via, blind&buried via, via in pad, Copper in via … |
| 9 |
Surface finish/treatment |
HASL/HASL lead free, Chemical tin, Chemical Gold, Immersion gold Inmersion Silver/Gold, Osp, Gold Plating |
| 10 |
Base Material |
FR408 FR408HR, PCL-370HR;IT180A, Megtron 6(Panasonic);Rogers4350,
Rogers4003, RO3003, Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4) |
| 11 |
Solder mask color |
Green.Black.Red.Yellow.White.Blue.Purple.Matte Green. Matte Black |
| 12 |
Testing Service |
AOI, X-Ray, Flying-Probe, Function Test, First Article Tester |
| 13 |
Profiling Punching |
Routing,V-CUT,Beveling |
| 14 |
Bow&twist |
≤0.5% |
| 15 |
HDI type |
1+n+1,2+n+2,3+n+3 |
| 16 |
Min mechanical aperture |
0.1mm |
| 17 |
Min laser aperture |
0.075mm |
What CESGATE provide?
1. 7/24 Sales and technical support
2. Felxible payment methods and negotiable payment terms
3. Both samples and bulk orders are supported
4. More than 10 years overseas export experience, flexible handling of transportation and customs clearance issues
FAQ
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Q: How long is the shelf life of the PCB board and how should it be stored?
CESGATE: 25℃ / 60%RH is recommended when the PCB is stored. The plate itself has no shelf life, but if it exceeds three months, it needs to be baked to remove moisture and stress, and it should be used immediately after baking. It is recommended that the pieces should be loaded within 6 months of storage to reduce the phenomenon of rejection and explosion.
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Q: Why should we buy from CESGATE?
CESGATE: Professional and experienced R&D team. Advanced production equipment, scientific and reasonable process flow.
Reliable and strict quality control system. We test all our products before shipment to make sure everything is in perfect condition. From the design to the complete product, CESGATE's professional team will put you at ease
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Q: What are the types of solder mask?
CESGATE: There are traditional epoxy resin IR baking type, UV curing type, Liquid Photo Imageable Solder Mask and Dry film solder mask. Currently, the liquid solder mask is the main type. |
Q: Are my files safe?
CESGATE: Your files are held in complete safety and security.We protect the intellectual property for our customers in the whole process.. All documents from customers are never shared with any third parties.
If requested by the client, we will sign an NDA subject to local laws on the client's side and promise to keep client data highly confidential. |
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