RFI Products

If you can design it, we can make it. 

This page provides you with design advise, examples of typical shielding cans and also make you aware of the types of features that are available when using Chemical Milling as a method of manufacture.

Collection of EMC/RFI Shielding, Screening Cans (Shielding)

We will manufacture to any specification!

Examples of Can Types

	Single piece PCB shielding can. Features half etch fold lines and location pins.		Four sided can with removable lid. Removable spring fingered lids or push fit lids.
	Multi-level Cans with removable spring fingered lids.		Complex Cans. May be manufactured with dividers, locking tabs, locating holes, brackets, lid captivation, soldered detail and dimples.

Features:

• Solder Joints – Butt jointed corners with tin plate finish, allows corners to be soldered for increased screening.

• Spot Welding – Overlapping joint corners with tin plate finish are spot welded for increased screening.

• Locking Tabs / Locating Holes – an alternative to soldering, allowing greater rigidity.

• Dividers – provide discreet screening within the frame.

• Holes / Cut Outs – can be incorporated as requested.

• Anti Solder Migration Barrier – prevents solder creepage up the sides of its PCB mounting screening enclosures during automated and reflow soldering processes.

• Spring Fingered Lids – easy access and excellent attenuation.

• Push Fit Lids – easy access and good attenuation.

• PCB Locations – lancings or brackets can be specified to act as guides or supports.

• Locking Pins – for exact positioning and retention, deal for reflow soldering applications.

• Half Etch Pins – pins that are easily bent, to lock the shielding can into place.

• Common Metal Types – Copper, Brass, Mild Steel, Stainless Steel and Nickel Silver.

• Common Plating Types – Tin plate (Bright and Electrolytic) and Nickel plate.

• RoHs Compliance – All standard metal used for shielding cans are RoHS compliant. The types of plating we offer will always be RoHS compliant, usless you state otherwise. Please note that Hot Tin Dip is not RoHS compliant.

The Benefits of Shielding at PCB Level

SHIELDING 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.

Although board level shielding using simple metal cans is much easier than shielding at enclosure level, there are still design issues to consider. 

To find out more about the Photo Etching Process please either contact us on 01480 475831, or take “The Process Tour” 

Photofabrication have wide experience in the manufacture of EMC/RFI Shielding, Screening Cans (Shielding). A selection of previously manufactured components is shown below. All components are customized to your requirements from low cost tooling. If you need a EMC/RFI Shielding, Screening Cans (Shielding), please call us on 01480 226699 or contact us for further information.

If you like what you see, please contact us. If there is nothing similar to the component you need, then we will make a customised part for you.

Screening can, screening cans, RFI, EMI, EMC, Shielding