Reference indicators - these identify the component types from the BOM. There are some silkscreen markings used to accurately place components as follows: The application of PCB silkscreen is done during PCB fabrication, but it’s used for the PCB assembly process steps, which is mainly in referring to placing or mounting components. It should be noted though that the acrylic ink does not cure on boards with silver finishes. The ink is cured with UV light as it is printed. In this process an inkjet projector is used with acrylic ink that is applied onto the raw PCB directly from the CAD data.
SILKSCREEN SERVICES MANUAL
It is much more accurate than manual screening.ĭLP is the most accurate of all these processes but is more expensive. After this the board is developed and cured. In this a liquid photo-imageable epoxy is coated on to the laminate and then exposed with UV light. Liquid Photo Imaging is quite similar to the process used for the application of solder mask. This method is used when the line widths are greater than 4 mil. Nowadays, there are the two most common silkscreen PCB printing techniques, such as liquid photo imaging (LPI) and direct legend printing (DLP). In the past few years, the primary method of silkscreen referred to using a stencil to directly apply ink to the board surface. Importance of the s ilkscreen PCB to a ssembly Identification numbers unique to each board Location of parts through reference designators For traditional silk-screening you require a polyester screen stretched on aluminum frames, a laser photo plotter, spray developer and curing ovens.Ī silkscreen can provide the following information:
SILKSCREEN SERVICES SOFTWARE
PCB software also uses standard fonts in silkscreen layers but you can choose other fonts from the system too. The standard colors we normally see are black, white and yellow. The ink used for these markings is highly formulated. Essentially a detailed PCB silkscreen can help both the manufacturer and the engineer to locate and identify all the components. This silkscreen is usually applied on the component side however using silkscreen on the solder side is also not uncommon. Silkscreen is a layer of ink traces used to identify components, test points, parts of the PCB, warning symbols, logos and marks etc. When you design or order your printed circuit boards, do you need to pay extra for silkscreen? There are some questions you need to know what’s silkscreen? And how important silkscreen is in your PCB fabrication? Now PCBGOGO will explain for you.
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