Prototype PCB assembly and analysis

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In my last post about printed circuit board manufacturing and prototype pcb assembly, we looked at the various finishes that can be applied to printed circuit boards, such as silver or gold.

These finishes are just some of the many chemical processes that take place during prototype PCB assembly and manufacture such as Plating, Etching and Developing for example.
One thing all these processes have in common is that they have to be maintained by continual analysis of the chemicals used to ensure top performance at all times.

FIGure1During use, the chemicals will deteriorate and need constant replenishment and in some cases will need some undesirable elements removed or stabilised. Close control of chemical concentrations is vital for quality of production and our resident chemist, Jay, makes sure that each process we use in the printed circuit board assembly is kept to its optimum at all times.

Basically, Jay will take a sample of a particular chemical and, depending on its usage, analyse it using our Spectrometer (See Fig.1) or Titration (See Fig.2).
FIG2The results of the analyses are recorded and Jay will make additions or other adjustments to the chemical bath as required.

 

Results are then entered into the database (Fig.3) .

FIG3

Then these are automatically uploaded to our Statistical Process Control or SPC system to produce relevant tables and charts. (Fig.4, Fig 5).

FIG4 FIG5

Using the network, this information is then available to management. Charts are also displayed on notice boards.

More than 80 analyses are performed in-house and ensure that production quality is maintained at all times, whether its a prototype PCB assembly or volume manufactured board.

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