Production Manufacturing Services
Automatic Optical Inspection (AOI)
Inspects Solder Joints & Component Identification
Our Automatic Optical Inspection (AOI) uses a 3-CCD color camera and other cameras to visually inspect a wide range of defects on a PCB. Typical defects might include dimensional defects such as insufficient solder, solder bridges, missing solder, missing or incorrectly placed components.
Component identification is the second important task performed by AOI. The marking of each component is verified against a database of component markings. The database is constantly expanded to include varying markings from different manufacturers of the same component.
- Each production run of PCBs is compared to a Customer supplied Golden Board
- All Golden Boards are tracked by Version Numbers
- AOI provides Production Batch manufacturing verification
AOI is not to be confused with Testing
- Successful AOI outcomes do not guarantee a functioning board
- Only Board Testing can verify the validity of component performance
PCB Board Testing
Full ICT / MDA Service
In-Circuit Testing (ICT) involves the use of a bed of nails jig to gain access to various nodes on an assembled Printed Circuit Board so that a variety of tests may be performed on the assembly. Tests include integrity of tracks, measurement of resistance and capacitance along with many other measurements.
After testing is performed and the board is electrically sound, the next stage involves loading firmware into various components thus bringing the assembly to life. Once concluded, the ICT can start to perform live test on many parts of the assembly.
ICT must be designed in
- ICT must be considered at the start of design
- Test points must be accessible by probes
- Consider test points for functional live test
- Test jigs can measure colour & intensity of LEDs
- Many tests are possible on our ICT machine
Selective and Accurate
Conformal coating of PCBs is normally required when the assembly is destined for a harsh environment. The two typical methods of conformal coat are by spraying or dipping. Often dipping is not possible because the PCB contains connectors which must not be coated.
This is where our conformal coating machine becomes a more versatile option. Software is used to select sections of a PCB to be sprayed. The spraying is then with special spray heads at extremely low PSI settings, this eliminates any overspray to neighbouring components.
- There are different types of Conformal Coat for varied applications
- Consider which product is suitable for your application
- Consider which parts of your PCB need to be protected
- Thicker applications are achieved by multiple spray passes
- Some conformal coats contain a UV tracer for application verification
Low Melt Overmoulding
Low Melt Overmoulding is a simple method of waterproofing electronic assemplies and also providing mechanical support and strain relief. The moulding polyamide-based hot-melt adhesives have a melting range of 120°C to 180°C and are low viscosity and present good adhesion to many plastics such as polyethylene, polyvinyl chloride and polyamide.
The process is related to injection moulding where heated hot-melt adhesive is injected into a tool. The thin molten mass will flow around filigree components at low pressure unlike the high pressure required for conventional plastic injection moulding. The low pressure makes the entire process economical, as both the machine and the tool can be designed for these low loads, allowing the use of inexpensive aluminium tooling.
- Low temperatures will not affect electronic components
- Encapsulation is both waterproof and tamperproof
- Electronic Circuits can be encapsulated into a single cable
- Inexpensive tooling makes low volume possible