Part 1 - COMMON PCB FABRICATION SPEC
FR-4 (COMMON PCB Board Material)
The PCB material used is commonly FR-4. It is a durable PCB material suitable for most type of application. It is a Flame Retardant (which gives its name FR grade 4) glass reinforced epoxy laminate material, which is resistance to flame, good strength, and is resistance to water. It is a very common board material used for PCB fabrication.
There are many other types of materials available for PCB fabrication. We do not recommend other materials other than FR-4, unless your design requires the specific specification, or is suitable for your situation. There are advantages and disadvantages for each of the material. In most situation, FR-4 will be enough. For your information, the following are the other type of materials available for PCB fabrication。
- G10, G11, FR-1, FR-2, FR-3, FR-4, FR-5 (flame retardant)
- CEM-1, CEM-3, CEM-5 (Composite Epoxy Material)
- Flexible PCB (for tight space, flexible)
- Ceramic, Metal, Aluminum (for high heat generating components)
- Roger (for high-frequency application), RO3000, RO4000
- Polyimide, PTFE, Polytetrafluoroethylene (Teflon)
0.8mm and 1.6mm (COMMON BOARD THICKNESS)
The most COMMONLY used PCB board thickness is 0.8mm and 1.6mm. For board thickness 1.6mm provides a stronger support for a typical application.
Most through hole mounted components are designed to be mounted onto a 1.6mm PCB board. Most standard enclosures are designed for 1.6mm PCB board. Using 1.6mm is recommended unless you have a specific reason to use other thickness. Always ensure that your through-hole components can be properly mounted if you are using non-standard PCB thickness 1.6mm.
For small dedicated design, thinner PCB board may be preferred. In extreme cases, proper routing of traces on thin PCB board it can help to improve the signal integrity.
For rare larger size PCB board design, the board may tend to bend or wrap. Care is needed to ensure that there is sufficient support (or mounting holes) to hold the PCB board. It may be necessary to increase the PCB thickness to 2.0mm or above for a better mechanical strength.
Some of the common PCB thickness can be 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm, 2.2mm, 2.4mm.
1 Layer or 2 Layers Board Design
2L means 2 layers. For the very simple circuit, you may only need a single layer PCB. In most design, you would easily end up with a 2 layer board. The manufacturing process gets complicated as the number of layer increase more than 2 layers. This also means the cost will be higher for a multi-layer board. Unless you have board size constraint or limitation in your electronic design, it is strongly recommended to keep your PCB layout within 2 layers.
While designing a 2 layers board can be more challenging and time-consuming than a multi-layer board, 2 layer board offers the following advantages,
- Lower production cost
- Lower maintenance cost
- Easier to troubleshoot
- Easier to make repair, modification
In order to let our user experience on using our service, we offer FREE PCB Board Fabrication on COMMON PCB specification in 5pcs quantities and X & Y edge of board should =<100mm each.
Remember don’t design board in ODD shape!!!
** Term and condition applied.