These can be applied to a variety of metals, most popular being Nickel Silver (maintains solderability with no post coating required), or traditionally either a brass or mild steel coated with either tin or nickel plating (depending on your requirements). The full process is available, including forming, plating, soldering and / or spot welding.
Sheilding at PCB Board Level – A deceptively simple technique for controlling EMC (Electro-Magnetic Compatibility). Perhaps the most common technique to keep harmful interference out and also unwanted emission in.
Solutions at Product Enclosure Level – Why This is Unadvisable
Practical EMC shielding requires considerable engineering skill to give good results. However, at product enclosure level, it can be complex and expensive when taking into account both additional material and assembly costs. Also, effective enclosure shielding usually requires substantial filtering of all cables, which pass out of the product right at the point where they penetrate the enclosure shield.
Why Use Shielding at PCB Level?
Shielding at PCB level, however, is simple and low cost. Board level shielding solutions can be used to achieve an EMC performance that would be far more difficult and costly at product enclosure level.
At board level, shielding cans can be used selectively on problem areas of a circuit, directly tackling components with emissions that are too high or are too sensitive.
In brief, PCB shielding cans are simple metal boxes that are easily soldered in place. Dealing with EMC problems at this level, ensures component and assembly costs are low and the appearance and ease of maintenance of the product are not compromised.
Effect on Emissions
With this method of execution, the circuit board tracking and wiring is shielded inside the can solution. Due to space, contained tracks and wires are consequently very short and not very efficient as aerial radiating RFI or EMI. Furthermore, filtering to reduce overall emissions to an acceptable level, may be minimal if required at all.
For bespoke RFI Shielding products the manufacturing technique of choice is Chemical Milling, let us illustrate this in more detail:
Photofab have for many years worked closely with connector manufacturers to supply high quality development metal connectors. Photofab can supply formed, heat treated and plated contacts and connectors that will represent the final fully tooled product in very short lead times.Read More
Photofab has a wide experience in the manufacture of metal filters, meshes, screens and grids. Key requirements include high accuracy, fine apertures, no “breaks” in the bars and no burrs. Due to the bespoke nature of each user’s requirement Photofab offer solutions customized to your individual requirements.Read More
Photofab can chemically etch bi-polar plates used in Proton Exchange Membrane (PEM) fuel cells. Fuel cell development has moved forward a long way in the past few years, Photofab work with some of the industries key minds on trialing new designs for separator plates (conductive plates within a fuel cell stack acting as an anode for one fuel cell and …Read More
Photofab supply stacked and bonded metal laminations to high accuracy and consistency. The use of a specialised resist provides both insulating properties within the stack as well as bonding capabilities. The etching process provides a burr free finish, ideal to eliminate problems during winding. The full process is available, including post stacking services such as grinding where required.Read More
Photofabrication supply RFI Shielding solutions using various intelligent design techniques. These can be applied to a variety of metals, most popular being Nickel Silver (maintains solderability with no post coating required), or traditionally either a brass or mild steel coated with either tin or nickel plating (depending on your requirements). The full process is available, including forming, plating, soldering and …Read More
World leading manufacturers of springs since 1971 Strip or flat springs come in many different designs, sizes and materials Beryllium Copper, Phosphor Bronze, Carbon Spring Steel and Stainless Steel and are used in many different industries: electronics, military, automotive, aircraft, space, medical, telecoms and shipping. Complex designs from prototype through to production quantities can be produced economically and on short …Read More
Forming – the bending and shaping of parts. Forming, metal forming, is the metalworking process of fashioning metal parts and objects through mechanical deformation; the workpiece is reshaped without adding or removing material, and its mass remains unchanged.Forming (metalworking) – Wikipedia In addition to manufacturing your parts we are able to offer a variety of forming solutions to suit your …Read More