PCB prototype is the preliminary step of mass production, prototyping verifies the performance of the designed product which is OK. In addition, PCB prototype is also a verification function for board manufacturers. After the PCB prototype is confirmed to be accurate before mass production, we are recommended in the same PCB manufacturer to proceed with the high volume production.
How to provide documents for PCB prototype
What should be noticed in the documentation provided?
- File format: Normally need to provide Altium/Gerber/Eagle files. For the Gerber file, (for now we only accept RS-274-X format), double layers are shown below：
GTL- top copper layer
GBL- bottom copper layer
GTS- top solder mask layer
GBS- bottom solder mask layer
GTO- top overlay layer
GBO- bottom overlay layer
DRL -drill layer
GM1- mechanical 1
GKO- keep-out layer
4 layers need the extra layer order, eg:
TOP-VCC-GND-BOT 、TOP-GP1-GP2-BOT、 TOP-G1-G2-BOT、 art001-art002-art003-art004
- PCB parameters: there are general the number of layers, material, thickness, surface finish, color of solder mask, copper thickness, and other specific requirements, the following to understand the main parameters of this part.
Materials：It is best to consult in advance to explain what kind of materials are required for the manufacture of PCB prototype. At present, the most common material is FR4, FR-4 glass epoxy is a popular and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios.
Layers：The price of PCB board varies with the number of layers
Solder Mask: There are many colors about PCB prototype, green, black, white, blue, red, yellow, matt black and matt green (We support all of the above color). It is worth mentioning that considering efficiency and cost, UETPCBA regards green as a conventional color.
Silkscreen： The silkscreens printed on the PCB is usually matched with the solder mask color.Copper：Generally according to the current of PCB circuit to scientific calculation of the thickness of copper, generally the thicker the better, but the cost will be higher, so it needs a reasonable balance (we support 1 to 10oz).
Via Process：Tenting vias, Plugged vias and Vias not coveredSurface Finish：Currently we support Electroless Nickel Immersion Gold (ENIG), Hot Air Solder Level (HASL, Lead and Lead‐free), OSP, Immersion Tin, Immersion Silver, ENEPIG Gold Fingers, Flash Gold, Full Body Hard Gold, Wire Bondable Gold, etc.
Quantity: The number of PCB prototypes to be made must be clearly stated.
Other Special Requirements: if there are any other special requirements for PCB manufacturing, you should also inform to your PCB manufacturer, like impedance control, custom stack-up and other special production process.
How to provide files for PCB Assembly
PCB FILE: PCB Altium/Gerber/Eagle files (all mentioned above)
Bill of Materials (BOM): Including Manufacture part numbers, Brands, Descriptions, Designators, Quantities, Footprint, Customer part number, etc. Assembly drawings: Including Reference designators, Component positions & Polarities Pick & Place files: also called Centroid File
Test Guidance Document: the guidance and technical requirements of test parameters, and features that need to be noted during testing.
Special instructions: Conformal coating, Potting, Serial numbers, etc.
The above is how to prepai r files for your PCB prototype project. If you have any questions, please feel free to contact us.